add all frontend files

node_modules/es-iterator-helpers/test/Iterator.concat.js

@@ -0,0 +1,718 @@
+'use strict';
+
+var defineProperties = require('define-properties');
+var test = require('tape');
+var callBind = require('call-bind');
+var functionsHaveNames = require('functions-have-names')();
+var forEach = require('for-each');
+var debug = require('object-inspect');
+var v = require('es-value-fixtures');
+var hasSymbols = require('has-symbols/shams')();
+var mockProperty = require('mock-property');
+var hasPropertyDescriptors = require('has-property-descriptors')();
+
+var index = require('../Iterator.concat');
+var impl = require('../Iterator.concat/implementation');
+var from = require('../Iterator.from/polyfill')();
+
+var isEnumerable = Object.prototype.propertyIsEnumerable;
+
+var testIterator = require('./helpers/testIterator');
+
+module.exports = {
+	tests: function (concat, name, t) {
+		t['throws'](
+			function () { return new concat(); }, // eslint-disable-line new-cap
+			TypeError,
+			'`' + name + '` itself is not a constructor'
+		);
+		t['throws'](
+			function () { return new concat({}); }, // eslint-disable-line new-cap
+			TypeError,
+			'`' + name + '` itself is not a constructor, with an argument'
+		);
+
+		forEach(v.primitives.concat(v.objects), function (nonIterator) {
+			t['throws'](
+				function () { concat(nonIterator); },
+				TypeError,
+				debug(nonIterator) + ' is not an iterable Object'
+			);
+		});
+
+		t.deepEqual(concat().next(), { value: undefined, done: true }, 'no arguments -> empty iterator');
+
+		t.test('actual iteration', { skip: !hasSymbols }, function (st) {
+			forEach(v.nonFunctions, function (nonFunction) {
+				var badIterable = {};
+				badIterable[Symbol.iterator] = nonFunction;
+				st['throws'](
+					function () { concat([], badIterable, []); },
+					TypeError,
+					debug(badIterable) + '[Symbol.iterator] is not a function'
+				);
+			});
+
+			forEach(v.primitives, function (nonObject) {
+				var badIterable = {};
+				badIterable[Symbol.iterator] = function () { return nonObject; };
+				st['throws'](
+					function () { concat([], badIterable, []).next(); },
+					TypeError,
+					debug(badIterable) + '[Symbol.iterator] does not return an object'
+				);
+			});
+
+			forEach(v.strings, function (string) {
+				st['throws'](
+					function () { concat(string); },
+					TypeError,
+					'non-objects are not considered iterable'
+				);
+				var stringIt = concat(['a'], [string], ['c']);
+				testIterator(stringIt, ['a', string, 'c'], st, 'string iterator: ' + debug(string));
+			});
+
+			var arrayIt = concat([1, 2, 3]);
+			st.equal(typeof arrayIt.next, 'function', 'has a `next` function');
+
+			st.test('real iterators', { skip: !hasSymbols }, function (s2t) {
+				var iter = [1, 2][Symbol.iterator]();
+				testIterator(concat(iter, [3]), [1, 2, 3], s2t, 'array iterator + array yields combined results');
+
+				s2t.end();
+			});
+
+			st.test('observability in a replaced String iterator', function (s2t) {
+				var originalStringIterator = String.prototype[Symbol.iterator];
+				var observedType;
+				s2t.teardown(mockProperty(String.prototype, Symbol.iterator, {
+					get: function () {
+						'use strict'; // eslint-disable-line strict, lines-around-directive
+
+						observedType = typeof this;
+						return originalStringIterator;
+					}
+				}));
+
+				concat(from(''));
+				s2t.equal(observedType, 'string', 'string primitive -> primitive receiver in Symbol.iterator getter');
+				concat(from(Object('')));
+				s2t.equal(observedType, 'object', 'boxed string -> boxed string in Symbol.iterator getter');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/concat/arguments-checked-in-order', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var getIterator = 0;
+
+				var iterable1 = {};
+				Object.defineProperty(iterable1, Symbol.iterator, {
+					get: function () {
+						getIterator += 1;
+						return function () {
+							throw new EvalError();
+						};
+					}
+				});
+
+				var iterable2 = {};
+				Object.defineProperty(iterable2, Symbol.iterator, {
+					get: function () {
+						throw new EvalError();
+					}
+				});
+
+				s2t.equal(getIterator, 0);
+
+				s2t['throws'](function () { concat(iterable1, null, iterable2); }, TypeError);
+
+				s2t.equal(getIterator, 1);
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/concat/fresh-iterator-result', function (s2t) {
+				var oldIterResult = {
+					done: false,
+					value: 123
+				};
+
+				var testIterator1 = {
+					next: function () {
+						return oldIterResult;
+					}
+				};
+
+				var iterable = {};
+				iterable[Symbol.iterator] = function () {
+					return testIterator1;
+				};
+
+				var iterator = concat(iterable);
+
+				var iterResult = iterator.next();
+
+				s2t.equal(iterResult.done, false);
+				s2t.equal(iterResult.value, 123);
+
+				s2t.notEqual(iterResult, oldIterResult);
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/concat/get-iterator-method-only-once', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var iteratorGets = 0;
+				var iteratorCalls = 0;
+				var array = [1, 2, 3];
+
+				function CountingIterable() {}
+				Object.defineProperty(
+					CountingIterable.prototype,
+					Symbol.iterator,
+					{
+						get: function () {
+							iteratorGets += 1;
+
+							return function () {
+								iteratorCalls += 1;
+								return array[Symbol.iterator]();
+							};
+						}
+					}
+				);
+
+				var iterable = new CountingIterable();
+
+				s2t.equal(iteratorGets, 0);
+				s2t.equal(iteratorCalls, 0);
+
+				var iter = concat(iterable);
+
+				s2t.equal(iteratorGets, 1);
+				s2t.equal(iteratorCalls, 0);
+
+				testIterator(iter, array, s2t, 'iterating over the iterator calls the iterator function once');
+
+				s2t.equal(iteratorGets, 1);
+				s2t.equal(iteratorCalls, 1);
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/concat/get-iterator-method-throws', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var iterable = {};
+				Object.defineProperty(iterable, Symbol.iterator, {
+					get: function () {
+						throw new EvalError();
+					}
+				});
+
+				s2t['throws'](function () { concat(iterable); }, EvalError);
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/concat/inner-iterator-created-in-order', function (s2t) {
+				var calledIterator = [];
+
+				var iterable1 = {};
+				iterable1[Symbol.iterator] = function () {
+					calledIterator.push('iterable1');
+					return [1][Symbol.iterator]();
+				};
+
+				var iterable2 = {};
+				iterable2[Symbol.iterator] = function () {
+					calledIterator.push('iterable2');
+					return [2][Symbol.iterator]();
+				};
+
+				var iterator = concat(iterable1, iterable2);
+
+				s2t.deepEqual(calledIterator, []);
+
+				s2t.deepEqual(iterator.next(), { done: false, value: 1 });
+
+				s2t.deepEqual(calledIterator, ['iterable1']);
+
+				s2t.deepEqual(iterator.next(), { done: false, value: 2 });
+
+				s2t.deepEqual(calledIterator, ['iterable1', 'iterable2']);
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/concat/next-method-called-with-zero-arguments', function (s2t) {
+				var nextCalled = 0;
+
+				var testIterator1 = {
+					next: function () {
+						nextCalled += 1;
+						s2t.equal(arguments.length, 0);
+
+						return {
+							done: false,
+							value: 0
+						};
+					}
+				};
+
+				var iterable = {};
+				iterable[Symbol.iterator] = function () {
+					return testIterator1;
+				};
+
+				var iterator = concat(iterable);
+				s2t.equal(nextCalled, 0);
+
+				iterator.next();
+				s2t.equal(nextCalled, 1);
+
+				iterator.next(1);
+				s2t.equal(nextCalled, 2);
+
+				iterator.next(1, 2);
+				s2t.equal(nextCalled, 3);
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/concat/next-method-returns-non-object', function (s2t) {
+				var nonObjectIterator = {
+					next: function () {
+						return null;
+					}
+				};
+
+				var iterable = {};
+				iterable[Symbol.iterator] = function () {
+					return nonObjectIterator;
+				};
+
+				var iterator = concat(iterable);
+
+				s2t['throws'](function () { iterator.next(); }, TypeError);
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/concat/next-method-returns-throwing-done', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var throwingIterator = {
+					next: function () {
+						var result = { done: null, value: 1 };
+						Object.defineProperty(result, 'done', {
+							get: function () {
+								throw new EvalError();
+							}
+						});
+						return result;
+					},
+					'return': function () {
+						throw new Error();
+					}
+				};
+
+				var iterable = {};
+				iterable[Symbol.iterator] = function () {
+					return throwingIterator;
+				};
+
+				var iterator = concat(iterable);
+
+				s2t['throws'](function () { iterator.next(); }, EvalError);
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/concat/next-method-returns-throwing-value-done', { skip: !hasPropertyDescriptors }, function (s2t) {
+				function ReturnCalledError() {}
+				function ValueGetterError() {}
+
+				var throwingIterator = {
+					next: function () {
+						var result = { value: null, done: true };
+						Object.defineProperty(result, 'value', {
+							get: function () {
+								throw new ValueGetterError();
+							}
+						});
+						return result;
+					},
+					'return': function () {
+						throw new ReturnCalledError();
+					}
+				};
+
+				var iterable = {};
+				iterable[Symbol.iterator] = function () {
+					return throwingIterator;
+				};
+
+				var iterator = concat(iterable);
+
+				var iterResult = iterator.next();
+
+				s2t.equal(iterResult.done, true);
+				s2t.equal(iterResult.value, undefined);
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/concat/next-method-returns-throwing-value', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var throwingIterator = {
+					next: function () {
+						var result = { value: null, done: false };
+						Object.defineProperty(result, 'value', {
+							get: function () {
+								throw new EvalError();
+							}
+						});
+						return result;
+					},
+					'return': function () {
+						throw new Error();
+					}
+				};
+
+				var iterable = {};
+				iterable[Symbol.iterator] = function () {
+					return throwingIterator;
+				};
+
+				var iterator = concat(iterable);
+
+				s2t['throws'](function () { iterator.next(); }, EvalError);
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/concat/next-method-throws', function (s2t) {
+				var throwingIterator = {
+					next: function () {
+						throw new EvalError();
+					}
+				};
+
+				var iterable = {};
+				iterable[Symbol.iterator] = function () {
+					return throwingIterator;
+				};
+
+				var iterator = concat(iterable);
+
+				s2t['throws'](function () { iterator.next(); }, EvalError);
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/concat/return-is-not-forwarded-after-exhaustion', function (s2t) {
+				var testIterator1 = {
+					next: function () {
+						return {
+							done: true,
+							value: undefined
+						};
+					},
+					'return': function () {
+						throw new EvalError();
+					}
+				};
+
+				var iterable = {};
+				iterable[Symbol.iterator] = function () {
+					return testIterator1;
+				};
+
+				var iterator = concat(iterable);
+				iterator.next();
+				iterator['return']();
+
+				s2t.end();
+			});
+
+			t.test('test262: test/built-ins/Iterator/concat/return-is-not-forwarded-before-initial-start', function (s2t) {
+				var testIterator1 = {
+					next: function () {
+						return {
+							done: false,
+							value: 1
+						};
+					},
+					'return': function () {
+						throw new EvalError();
+					}
+				};
+
+				var iterable = {};
+				iterable[Symbol.iterator] = function () {
+					return testIterator1;
+				};
+
+				var iterator = concat(iterable);
+				iterator['return']();
+				iterator.next();
+				iterator['return']();
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/concat/return-method-called-with-zero-arguments', function (s2t) {
+				var returnCalled = 0;
+
+				var testIterator1 = {
+					next: function () {
+						return { done: false };
+					},
+					'return': function () {
+						returnCalled += 1;
+						s2t.equal(arguments.length, 0);
+						return { done: true };
+					}
+				};
+
+				var iterable = {};
+				iterable[Symbol.iterator] = function () {
+					return testIterator1;
+				};
+
+				var iterator;
+
+				// Call with zero arguments.
+				iterator = concat(iterable);
+				iterator.next();
+				s2t.equal(returnCalled, 0);
+
+				iterator['return']();
+				s2t.equal(returnCalled, 1);
+
+				// Call with one argument.
+				iterator = concat(iterable);
+				iterator.next();
+				s2t.equal(returnCalled, 1);
+
+				iterator['return'](1);
+				s2t.equal(returnCalled, 2);
+
+				// Call with two arguments.
+				iterator = concat(iterable);
+				iterator.next();
+				s2t.equal(returnCalled, 2);
+
+				iterator['return'](1, 2);
+				s2t.equal(returnCalled, 3);
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/concat/throws-typeerror-when-generator-is-running-next', function (s2t) {
+				var enterCount = 0;
+
+				var iterator;
+
+				var testIterator1 = {
+					next: function () {
+						enterCount += 1;
+						iterator.next();
+						return { done: false };
+					}
+				};
+
+				var iterable = {};
+				iterable[Symbol.iterator] = function () {
+					return testIterator1;
+				};
+
+				iterator = concat(iterable);
+
+				s2t.equal(enterCount, 0);
+
+				s2t['throws'](function () { iterator.next(); }, TypeError);
+
+				s2t.equal(enterCount, 1);
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/concat/result-is-iterator', function (s2t) {
+				var iter = concat();
+				s2t.equal(typeof iter.next, 'function', 'concat() result has next method');
+				s2t.equal(typeof iter[Symbol.iterator], 'function', 'concat() result has Symbol.iterator');
+				s2t.equal(iter[Symbol.iterator](), iter, 'concat() result Symbol.iterator returns itself');
+
+				var customIter = { next: function () { return { done: true, value: undefined }; } };
+				var iterable = {};
+				iterable[Symbol.iterator] = function () { return customIter; };
+				iter = concat(iterable);
+				s2t.equal(typeof iter.next, 'function', 'concat(iterable) result has next method');
+				s2t.equal(typeof iter[Symbol.iterator], 'function', 'concat(iterable) result has Symbol.iterator');
+				s2t.equal(iter[Symbol.iterator](), iter, 'concat(iterable) result Symbol.iterator returns itself');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/concat/single-argument', function (s2t) {
+				var array = [1, 2, 3];
+				var iterator = concat(array);
+
+				for (var i = 0; i < array.length; i += 1) {
+					var iterResult = iterator.next();
+					s2t.equal(iterResult.done, false, 'not done at index ' + i);
+					s2t.equal(iterResult.value, array[i], 'correct value at index ' + i);
+				}
+
+				var finalResult = iterator.next();
+				s2t.equal(finalResult.done, true, 'done after all values');
+				s2t.equal(finalResult.value, undefined, 'value is undefined when done');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/concat/many-arguments', function (s2t) {
+				var iterables = [
+					[],
+					[1],
+					[2, 3],
+					[4, 5, 6],
+					[7, 8, 9, 10]
+				];
+
+				var iterator = concat(iterables[0], iterables[1], iterables[2], iterables[3], iterables[4]);
+
+				var expected = [].concat(iterables[0], iterables[1], iterables[2], iterables[3], iterables[4]);
+
+				for (var i = 0; i < expected.length; i += 1) {
+					var iterResult = iterator.next();
+					s2t.equal(iterResult.done, false, 'not done at index ' + i);
+					s2t.equal(iterResult.value, expected[i], 'correct value at index ' + i);
+				}
+
+				var finalResult = iterator.next();
+				s2t.equal(finalResult.done, true, 'done after all values');
+				s2t.equal(finalResult.value, undefined, 'value is undefined when done');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/concat/zero-arguments', function (s2t) {
+				var iterator = concat();
+
+				var iterResult = iterator.next();
+				s2t.equal(iterResult.done, true, 'done immediately with zero arguments');
+				s2t.equal(iterResult.value, undefined, 'value is undefined');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/concat/return-is-forwarded', function (s2t) {
+				var returnCount = 0;
+
+				var testIterator1 = {
+					next: function () {
+						return { done: false, value: 1 };
+					},
+					'return': function () {
+						returnCount += 1;
+						return { done: true, value: undefined };
+					}
+				};
+
+				var iterable = {};
+				iterable[Symbol.iterator] = function () {
+					return testIterator1;
+				};
+
+				var iterator = concat(iterable);
+
+				s2t.equal(returnCount, 0, 'return not called before next()');
+
+				iterator.next();
+
+				s2t.equal(returnCount, 0, 'return not called after next()');
+
+				iterator['return']();
+
+				s2t.equal(returnCount, 1, 'return called once after iterator.return()');
+
+				// Subsequent return() calls should not forward again
+				iterator['return']();
+
+				s2t.equal(returnCount, 1, 'return not called again on subsequent return()');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/concat/throws-typeerror-when-generator-is-running-return', function (s2t) {
+				var enterCount = 0;
+				var iterator;
+
+				var reentrantTestIterator = {
+					next: function () {
+						return { done: false };
+					},
+					'return': function () {
+						enterCount += 1;
+						iterator['return'](); // re-entrant call
+						return { done: false };
+					}
+				};
+
+				var iterable = {};
+				iterable[Symbol.iterator] = function () {
+					return reentrantTestIterator;
+				};
+
+				iterator = concat(iterable);
+
+				iterator.next();
+
+				s2t.equal(enterCount, 0, 'return not entered before calling return()');
+
+				s2t['throws'](
+					function () { iterator['return'](); },
+					TypeError,
+					'throws TypeError when generator is running during return()'
+				);
+
+				s2t.equal(enterCount, 1, 'return entered exactly once before throwing');
+
+				s2t.end();
+			});
+
+			st.end();
+		});
+	},
+	index: function () {
+		test('Iterator.concat: index', function (t) {
+			module.exports.tests(index, 'Iterator.concat', t);
+
+			t.end();
+		});
+	},
+	implementation: function () {
+		test('Iterator.concat: implementation', function (t) {
+			module.exports.tests(impl, 'Iterator.concat', t);
+
+			t.end();
+		});
+	},
+	shimmed: function () {
+		test('Iterator.concat: shimmed', function (t) {
+			t.test('Function name', { skip: !functionsHaveNames }, function (st) {
+				st.equal(Iterator.concat.name, 'concat', 'Iterator.concat has name "concat"');
+				st.end();
+			});
+
+			t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
+				et.equal(false, isEnumerable.call(Iterator, 'concat'), 'Iterator.concat is not enumerable');
+				et.end();
+			});
+
+			t.equal(Iterator.concat.length, 0, 'Iterator.concat has length 0');
+
+			module.exports.tests(callBind(Iterator.concat, Iterator), 'Iterator.concat', t);
+
+			t.end();
+		});
+	}
+};

node_modules/es-iterator-helpers/test/Iterator.from.js

@@ -0,0 +1,322 @@
+'use strict';
+
+var defineProperties = require('define-properties');
+var test = require('tape');
+var callBind = require('call-bind');
+var functionsHaveNames = require('functions-have-names')();
+var hasProto = require('has-proto')();
+var forEach = require('for-each');
+var debug = require('object-inspect');
+var v = require('es-value-fixtures');
+var hasSymbols = require('has-symbols/shams')();
+var hasPropertyDescriptors = require('has-property-descriptors')();
+var mockProperty = require('mock-property');
+
+var index = require('../Iterator.from');
+var impl = require('../Iterator.from/implementation');
+
+var isEnumerable = Object.prototype.propertyIsEnumerable;
+
+var testIterator = require('./helpers/testIterator');
+
+var $Iterator = require('../Iterator/implementation');
+var iterProto = require('iterator.prototype');
+
+var getCodePoints = function getCodePoints(str) {
+	var chars = [];
+	for (var i = 0; i < str.length; i++) {
+		var c1 = str.charCodeAt(i);
+		if (c1 >= 0xD800 && c1 < 0xDC00 && i + 1 < str.length) {
+			var c2 = str.charCodeAt(i + 1);
+			if (c2 >= 0xDC00 && c2 < 0xE000) {
+				chars.push(str.charAt(i) + str.charAt(i + 1));
+				i += 1;
+				continue; // eslint-disable-line no-continue, no-restricted-syntax
+			}
+		}
+		chars.push(str.charAt(i));
+	}
+	return chars;
+};
+
+module.exports = {
+	tests: function (from, name, t) {
+		t['throws'](
+			function () { return new from(); }, // eslint-disable-line new-cap
+			TypeError,
+			'`' + name + '` itself is not a constructor'
+		);
+		t['throws'](
+			function () { return new from({}); }, // eslint-disable-line new-cap
+			TypeError,
+			'`' + name + '` itself is not a constructor, with an argument'
+		);
+
+		forEach(v.primitives.concat(v.objects), function (nonIterator) {
+			if (typeof nonIterator !== 'string') {
+				t['throws'](
+					function () { from(nonIterator).next(); },
+					TypeError,
+					debug(nonIterator) + ' is not an iterable Object'
+				);
+			}
+		});
+
+		t.test('actual iteration', { skip: !hasSymbols }, function (st) {
+			forEach(v.nonFunctions, function (nonFunction) {
+				var badIterable = {};
+				badIterable[Symbol.iterator] = nonFunction;
+				st['throws'](
+					function () { from(badIterable).next(); },
+					TypeError,
+					debug(badIterable) + ' is not a function'
+				);
+			});
+
+			// st['throws'](
+			// 	function () { return new from([]); }, // eslint-disable-line new-cap
+			// 	RangeError,
+			// 	'`' + name + '` iterator is not a constructor'
+			// );
+
+			forEach(v.strings, function (string) {
+				var stringIt = from(string);
+				testIterator(stringIt, getCodePoints(string), st, 'string iterator: ' + debug(string));
+			});
+
+			var arrayIt = from([1, 2, 3]);
+			st.equal(typeof arrayIt.next, 'function', 'has a `next` function');
+
+			st.test('__proto__ is Iterator.prototype', { skip: !hasProto }, function (s2t) {
+				var fakeIterator = {
+					__proto__: iterProto,
+					next: function () {}
+				};
+				s2t.ok(fakeIterator instanceof $Iterator, 'is an instanceof Iterator');
+				s2t.equal(typeof fakeIterator.next, 'function', 'fake iterator `.next` is a function');
+				s2t.equal(from(fakeIterator), fakeIterator, 'returns input when it is an instanceof Iterator');
+
+				s2t.end();
+			});
+
+			st.test('real iterators', { skip: !hasSymbols }, function (s2t) {
+				var iter = [][Symbol.iterator]();
+				// eslint-disable-next-line no-proto
+				var arrayIterHasIterProto = hasProto && iter.__proto__.__proto__ !== Object.prototype;
+				s2t.equal(
+					from(iter),
+					iter,
+					'array iterator becomes itself',
+					{ skip: !arrayIterHasIterProto && 'node 0.12 - 3 do not have Iterator.prototype in the proto chains' }
+				);
+
+				s2t.end();
+			});
+
+			st.test('observability in a replaced String iterator', function (s2t) {
+				var originalStringIterator = String.prototype[Symbol.iterator];
+				var observedType;
+				s2t.teardown(mockProperty(String.prototype, Symbol.iterator, {
+					get: function () {
+						'use strict'; // eslint-disable-line strict, lines-around-directive
+
+						observedType = typeof this;
+						return originalStringIterator;
+					}
+				}));
+
+				from('');
+				s2t.equal(observedType, 'string', 'string primitive -> primitive receiver in Symbol.iterator getter');
+				from(Object(''));
+				s2t.equal(observedType, 'object', 'boxed string -> boxed string in Symbol.iterator getter');
+
+				s2t.end();
+			});
+
+			st.test('262: get-next-method-only-once', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var nextGets = 0;
+				var testIter = {
+					next: function () {
+						return { done: true, value: undefined };
+					}
+				};
+				Object.defineProperty(testIter, 'next', {
+					get: function () {
+						nextGets += 1;
+						return function () {
+							return { done: true, value: undefined };
+						};
+					}
+				});
+
+				var iter = from(testIter);
+				s2t.equal(nextGets, 1, 'next retrieved once on creation');
+				iter.next();
+				s2t.equal(nextGets, 1, 'next not retrieved again on next()');
+				iter.next();
+				s2t.equal(nextGets, 1, 'next still not retrieved again');
+
+				s2t.end();
+			});
+
+			st.test('262: get-next-method-throws', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var testIter = {};
+				Object.defineProperty(testIter, 'next', {
+					get: function () {
+						throw new EvalError('next getter threw');
+					}
+				});
+
+				s2t['throws'](
+					function () { from(testIter); },
+					EvalError,
+					'throws when getting next throws'
+				);
+
+				s2t.end();
+			});
+
+			st.test('262: iterable-to-iterator-fallback', function (s2t) {
+				// When Symbol.iterator is null/undefined, treat object as iterator
+				var iteratorObj = {
+					next: function () {
+						return { done: true, value: undefined };
+					}
+				};
+				iteratorObj[Symbol.iterator] = null;
+				var iter1 = from(iteratorObj);
+				s2t.equal(typeof iter1.next, 'function', 'iterator with null Symbol.iterator is treated as iterator');
+
+				var iteratorObj2 = {
+					next: function () {
+						return { done: true, value: undefined };
+					}
+				};
+				iteratorObj2[Symbol.iterator] = undefined;
+				var iter2 = from(iteratorObj2);
+				s2t.equal(typeof iter2.next, 'function', 'iterator with undefined Symbol.iterator is treated as iterator');
+
+				s2t.end();
+			});
+
+			st.test('262: return-is-forwarded', function (s2t) {
+				var returnCalls = 0;
+				var testIter = {
+					next: function () {
+						return { done: false, value: 1 };
+					},
+					'return': function () {
+						returnCalls += 1;
+						return { done: true, value: undefined };
+					}
+				};
+
+				var iter = from(testIter);
+				iter.next();
+				s2t.equal(returnCalls, 0, 'return not called before calling return()');
+				iter['return']();
+				s2t.equal(returnCalls, 1, 'return called once after return()');
+
+				s2t.end();
+			});
+
+			st.test('262: return-method-returns-iterator-result', function (s2t) {
+				// When base iterator has no return method, wrapper's return() returns { done: true, value: undefined }
+				var testIter = {
+					next: function () {
+						return { done: false, value: 1 };
+					}
+				};
+
+				var iter = from(testIter);
+				iter.next();
+				var result = iter['return']();
+				s2t.equal(result.done, true, 'done is true');
+				s2t.equal(result.value, undefined, 'value is undefined');
+
+				s2t.end();
+			});
+
+			st.test('262: get-return-method-throws', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var testIter = {
+					next: function () {
+						return { done: false, value: 1 };
+					}
+				};
+				Object.defineProperty(testIter, 'return', {
+					get: function () {
+						throw new SyntaxError('return getter threw');
+					}
+				});
+
+				var iter = from(testIter);
+				iter.next();
+				s2t['throws'](
+					function () { iter['return'](); },
+					SyntaxError,
+					'throws when getting return throws'
+				);
+
+				s2t.end();
+			});
+
+			st.test('262: supports-iterator', function (s2t) {
+				// Non-iterable iterator objects (no Symbol.iterator, but has next)
+				var plainIterator = {
+					next: function () {
+						return { done: true, value: 42 };
+					}
+				};
+
+				var iter = from(plainIterator);
+				s2t.equal(typeof iter.next, 'function', 'wrapped iterator has next method');
+				var result = iter.next();
+				s2t.equal(result.done, true, 'done is true');
+				s2t.equal(result.value, 42, 'value is passed through');
+
+				s2t.end();
+			});
+
+			st.test('262: supports-iterable', function (s2t) {
+				// Iterable objects work
+				var arr = [1, 2, 3];
+				testIterator(from(arr), [1, 2, 3], s2t, 'array iterable');
+
+				s2t.end();
+			});
+
+			st.end();
+		});
+	},
+	index: function () {
+		test('Iterator.from: index', function (t) {
+			module.exports.tests(index, 'Iterator.from', t);
+
+			t.end();
+		});
+	},
+	implementation: function () {
+		test('Iterator.from: implementation', function (t) {
+			module.exports.tests(impl, 'Iterator.from', t);
+
+			t.end();
+		});
+	},
+	shimmed: function () {
+		test('Iterator.from: shimmed', function (t) {
+			t.test('Function name', { skip: !functionsHaveNames }, function (st) {
+				st.equal(Iterator.from.name, 'from', 'Iterator.from has name "from"');
+				st.end();
+			});
+
+			t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
+				et.equal(false, isEnumerable.call(Iterator, 'from'), 'Iterator.from is not enumerable');
+				et.end();
+			});
+
+			module.exports.tests(callBind(Iterator.from, Iterator), 'Iterator.from', t);
+
+			t.end();
+		});
+	}
+};

node_modules/es-iterator-helpers/test/Iterator.js

@@ -0,0 +1,95 @@
+'use strict';
+
+var defineProperties = require('define-properties');
+var test = require('tape');
+var functionsHaveNames = require('functions-have-names')();
+
+var index = require('../Iterator');
+var impl = require('../Iterator/implementation');
+
+var isEnumerable = Object.prototype.propertyIsEnumerable;
+
+module.exports = {
+	tests: function (Iter, name, t) {
+		t.equal(typeof Iter, 'function', name + ' is a function');
+
+		t['throws'](
+			function () { Iter(); }, // eslint-disable-line new-cap
+			TypeError,
+			name + ' throws when Call-ed'
+		);
+
+		t['throws'](
+			function () { return new Iter(); },
+			TypeError,
+			name + ' throws when Construct-ed'
+		);
+
+		var SubIter;
+		var SubSubIter;
+		try {
+			/* eslint no-new-func: 0 */
+			SubIter = Function('Iter', 'return class SubIter extends Iter {};')(Iter);
+			SubSubIter = Function('SubIter', 'return class SubSubIter extends SubIter {};')(SubIter);
+		} catch (e) { /**/ }
+
+		t.test('class inheritance', { skip: !SubIter }, function (st) {
+			st.doesNotThrow(
+				function () { return new SubIter(); },
+				'Extending ' + name + ' does not throw when Construct-ed'
+			);
+			st.doesNotThrow(
+				function () { return new SubSubIter(); },
+				'Extending ' + name + ' twice does not throw when Construct-ed'
+			);
+
+			st.end();
+		});
+	},
+	index: function () {
+		test('Iterator: index', function (t) {
+			module.exports.tests(index, 'Iterator', t);
+
+			t.end();
+		});
+	},
+	implementation: function () {
+		test('Iterator: implementation', function (t) {
+			module.exports.tests(impl, 'Iterator', t);
+
+			t.end();
+		});
+	},
+	shimmed: function () {
+		test('Iterator: shimmed', function (t) {
+			t.test('Function name', { skip: !functionsHaveNames }, function (st) {
+				st.equal(Iterator.name, 'Iterator', 'Iterator has name "Iterator"');
+				st.end();
+			});
+
+			t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
+				et.equal(false, isEnumerable.call(global, Iterator), 'Iterator is not enumerable');
+				et.end();
+			});
+
+			t.test('prototype descriptor', { skip: !defineProperties.supportsDescriptors }, function (pt) {
+				var desc = Object.getOwnPropertyDescriptor(Iterator, 'prototype');
+				pt.deepEqual(
+					desc,
+					{
+						configurable: false,
+						enumerable: false,
+						value: Iterator.prototype,
+						writable: false
+					}
+				);
+
+				pt.end();
+			});
+
+			module.exports.tests(Iterator, 'Iterator', t);
+
+			t.end();
+		});
+	}
+};

node_modules/es-iterator-helpers/test/Iterator.prototype.constructor.js

@@ -0,0 +1,57 @@
+'use strict';
+
+var defineProperties = require('define-properties');
+var test = require('tape');
+
+var Index = require('../Iterator.prototype.constructor');
+var Impl = require('../Iterator.prototype.constructor/implementation');
+
+var $Iterator = require('../Iterator/polyfill')();
+
+var isEnumerable = Object.prototype.propertyIsEnumerable;
+
+module.exports = {
+	tests: function (t, constructor, name) {
+		t.equal(constructor, $Iterator, name + ' is Iterator');
+	},
+	index: function () {
+		test('Iterator.prototype.constructor: index', function (t) {
+			t.notEqual(Index, $Iterator, 'index is not Iterator itself');
+			t.equal(typeof Index, 'function', 'index is a function');
+
+			t['throws'](
+				function () { Index(); }, // eslint-disable-line new-cap
+				TypeError,
+				'index throws when Call-ed'
+			);
+
+			t['throws'](
+				function () { return new Index(); },
+				TypeError,
+				'index throws when Construct-ed'
+			);
+
+			t.end();
+		});
+	},
+	implementation: function () {
+		test('Iterator.prototype.constructor: implementation', function (t) {
+			t.equal(Impl, $Iterator, 'implementation is Iterator itself');
+			module.exports.tests(t, Impl, 'Iterator.prototype.constructor');
+
+			t.end();
+		});
+	},
+	shimmed: function () {
+		test('Iterator.prototype.constructor: shimmed', function (t) {
+			module.exports.tests(t, Iterator.prototype.constructor, 'Iterator.prototype.constructor');
+
+			t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
+				et.equal(false, isEnumerable.call(Iterator.prototype, 'constructor'), 'Iterator#constructor is not enumerable');
+				et.end();
+			});
+
+			t.end();
+		});
+	}
+};

node_modules/es-iterator-helpers/test/Iterator.prototype.drop.js

@@ -0,0 +1,458 @@
+'use strict';
+
+var defineProperties = require('define-properties');
+var test = require('tape');
+var callBind = require('call-bind');
+var functionsHaveNames = require('functions-have-names')();
+var hasStrictMode = require('has-strict-mode')();
+var forEach = require('for-each');
+var debug = require('object-inspect');
+var v = require('es-value-fixtures');
+var hasSymbols = require('has-symbols/shams')();
+var hasPropertyDescriptors = require('has-property-descriptors')();
+var iterate = require('iterate-iterator');
+
+var index = require('../Iterator.prototype.drop');
+var impl = require('../Iterator.prototype.drop/implementation');
+
+var fnName = 'drop';
+
+var isEnumerable = Object.prototype.propertyIsEnumerable;
+
+var testIterator = require('./helpers/testIterator');
+
+module.exports = {
+	tests: function (drop, name, t) {
+		t['throws'](
+			function () { return new drop(); }, // eslint-disable-line new-cap
+			TypeError,
+			'`' + name + '` itself is not a constructor'
+		);
+
+		forEach(v.primitives.concat(v.objects), function (nonIterator) {
+			t['throws'](
+				function () { iterate(drop(nonIterator, 0)); },
+				TypeError,
+				debug(nonIterator) + ' is not an Object with a callable `next` method'
+			);
+
+			var badNext = { next: nonIterator };
+			t['throws'](
+				function () { iterate(drop(badNext, 0)); },
+				TypeError,
+				debug(badNext) + ' is not an Object with a callable `next` method'
+			);
+		});
+
+		t.test('observable lookups', { skip: !hasPropertyDescriptors }, function (st) {
+			var effects = [];
+
+			var obj = {};
+			Object.defineProperty(obj, 'next', {
+				configurable: true,
+				enumerable: true,
+				get: function next() {
+					effects.push('get next');
+					return function () {
+						return { done: true, value: undefined };
+					};
+				}
+			});
+			drop(obj, {
+				valueOf: function valueOf() {
+					effects.push('ToNumber limit');
+					return 0;
+				}
+			});
+
+			st.deepEqual(effects, [
+				'ToNumber limit',
+				'get next'
+			]);
+			st.end();
+		});
+
+		var arr = [1, 2, 3];
+
+		t.test('actual iteration', { skip: !hasSymbols }, function (st) {
+			var iterator = callBind(arr[Symbol.iterator], arr);
+
+			st['throws'](
+				function () { drop(iterator(), -3); },
+				RangeError,
+				'-3 is not >= 0'
+			);
+
+			st['throws'](
+				function () { return new drop(iterator()); }, // eslint-disable-line new-cap
+				TypeError,
+				'`' + name + '` iterator is not a constructor'
+			);
+			st['throws'](
+				function () { return new drop(iterator(), 0); }, // eslint-disable-line new-cap
+				TypeError,
+				'`' + name + '` iterator is not a constructor'
+			);
+
+			testIterator(iterator(), [1, 2, 3], st, 'original');
+			testIterator(drop(iterator(), 0), [1, 2, 3], st, 'drop 0');
+			testIterator(drop(iterator(), 1), [2, 3], st, 'drop 1');
+			testIterator(drop(iterator(), 2), [3], st, 'drop 2');
+			testIterator(drop(iterator(), 3), [], st, 'drop 3');
+			testIterator(drop(iterator(), Infinity), [], st, 'drop ∞');
+
+			st.test('262: limit-tonumber', function (s2t) {
+				// ToNumber coercion
+				testIterator(drop(iterator(), '1'), [2, 3], s2t, 'string "1" coerced to 1');
+				testIterator(drop(iterator(), 1.9), [2, 3], s2t, '1.9 truncated to 1');
+				testIterator(drop(iterator(), { valueOf: function () { return 1; } }), [2, 3], s2t, 'object with valueOf');
+				testIterator(drop(iterator(), true), [2, 3], s2t, 'true coerced to 1');
+				testIterator(drop(iterator(), null), [1, 2, 3], s2t, 'null coerced to 0');
+
+				s2t.end();
+			});
+
+			st.test('262: limit-tonumber-throws', function (s2t) {
+				s2t['throws'](
+					function () { drop(iterator(), { valueOf: function () { throw new EvalError('valueOf threw'); } }); },
+					EvalError,
+					'throws when valueOf throws'
+				);
+
+				s2t['throws'](
+					function () { drop(iterator(), Symbol('test')); },
+					TypeError,
+					'throws when limit is a Symbol'
+				);
+
+				s2t.end();
+			});
+
+			st.test('262: limit-rangeerror', function (s2t) {
+				s2t['throws'](function () { drop(iterator(), -1); }, RangeError, '-1 throws RangeError');
+				s2t['throws'](function () { drop(iterator(), -Infinity); }, RangeError, '-Infinity throws RangeError');
+				s2t['throws'](function () { drop(iterator(), NaN); }, RangeError, 'NaN throws RangeError');
+
+				s2t.end();
+			});
+
+			st.test('262: result is iterator', function (s2t) {
+				var iter = drop(iterator(), 1);
+				s2t.equal(typeof iter.next, 'function', 'has next method');
+				s2t.equal(typeof iter[Symbol.iterator], 'function', 'has Symbol.iterator method');
+				s2t.equal(iter[Symbol.iterator](), iter, 'Symbol.iterator returns itself');
+
+				s2t.end();
+			});
+
+			st.test('262: get next method only once', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var nextGets = 0;
+				var testIter = {};
+				Object.defineProperty(testIter, 'next', {
+					get: function () {
+						nextGets += 1;
+						return function () {
+							return { done: true, value: undefined };
+						};
+					}
+				});
+
+				var iter = drop(testIter, 1);
+				s2t.equal(nextGets, 1, 'next retrieved once on creation');
+				iter.next();
+				s2t.equal(nextGets, 1, 'next not retrieved again');
+
+				s2t.end();
+			});
+
+			st.test('262: next method returns non-object throws', function (s2t) {
+				var badIterator = {
+					next: function () {
+						return null;
+					}
+				};
+
+				var iter = drop(badIterator, 1);
+				s2t['throws'](function () { iter.next(); }, TypeError, 'throws when next returns null');
+
+				s2t.end();
+			});
+
+			st.test('262: next method returns throwing done', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var throwingIterator = {
+					next: function () {
+						var result = { value: 1 };
+						Object.defineProperty(result, 'done', {
+							get: function () {
+								throw new EvalError('done getter threw');
+							}
+						});
+						return result;
+					}
+				};
+
+				var iter = drop(throwingIterator, 1);
+				s2t['throws'](function () { iter.next(); }, EvalError, 'throws when done getter throws');
+
+				s2t.end();
+			});
+
+			st.test('262: next method throws', function (s2t) {
+				var throwingIterator = {
+					next: function () {
+						throw new EvalError('next threw');
+					}
+				};
+
+				var iter = drop(throwingIterator, 1);
+				s2t['throws'](function () { iter.next(); }, EvalError, 'throws error from next');
+
+				s2t.end();
+			});
+
+			st.test('262: throws TypeError when generator is running', function (s2t) {
+				var reentrantIterator;
+				var testIter = {
+					next: function () {
+						reentrantIterator.next();
+						return { done: false, value: 1 };
+					}
+				};
+
+				reentrantIterator = drop(testIter, 0);
+				s2t['throws'](function () { reentrantIterator.next(); }, TypeError, 'throws on reentrant next()');
+
+				s2t.end();
+			});
+
+			st.test('262: limit-equals-total', function (s2t) {
+				testIterator(drop(iterator(), 3), [], s2t, 'drop exactly 3 from 3-item iterator');
+
+				s2t.end();
+			});
+
+			st.test('262: limit-greater-than-total', function (s2t) {
+				testIterator(drop(iterator(), 5), [], s2t, 'drop 5 from 3-item iterator');
+				testIterator(drop(iterator(), 100), [], s2t, 'drop 100 from 3-item iterator');
+
+				s2t.end();
+			});
+
+			st.test('262: limit-less-than-total', function (s2t) {
+				testIterator(drop(iterator(), 1), [2, 3], s2t, 'drop 1 from 3-item iterator');
+				testIterator(drop(iterator(), 2), [3], s2t, 'drop 2 from 3-item iterator');
+
+				s2t.end();
+			});
+
+			st.test('262: exhaustion does not call return', function (s2t) {
+				var returnCalls = 0;
+
+				var testIter = {
+					next: function () {
+						return { done: true, value: undefined };
+					},
+					'return': function () {
+						returnCalls += 1;
+						return { done: true, value: undefined };
+					}
+				};
+
+				var iter = drop(testIter, 1);
+				iter.next();
+				s2t.equal(returnCalls, 0, 'return not called on exhaustion');
+
+				s2t.end();
+			});
+
+			st.end();
+		});
+
+		t.test('262: test/built-ins/Iterator/prototype/drop/get-return-method-throws', { skip: !hasPropertyDescriptors }, function (st) {
+			var badIterator = {
+				next: function next() {
+					return {
+						done: false,
+						value: 1
+					};
+				}
+			};
+
+			Object.defineProperty(badIterator, 'return', {
+				configurable: true,
+				enumerable: true,
+				get: function () { throw new SyntaxError(); }
+			});
+
+			var iter = drop(badIterator, 1);
+			iter.next();
+
+			st['throws'](
+				function () { iter['return'](); },
+				SyntaxError,
+				'gets the `return` method, whose getter throws'
+			);
+
+			st.end();
+		});
+
+		t.test('262: test/built-ins/Iterator/prototype/drop/return-is-forwarded', function (st) {
+			var returnCount = 0;
+
+			var makeBadIterator = function makeBadIterator() {
+				return {
+					next: function next() {
+						return {
+							done: false,
+							value: 1
+						};
+					},
+					'return': function () {
+						returnCount += 1;
+						return {};
+					}
+				};
+			};
+
+			var iter1 = drop(makeBadIterator(), 0);
+			st.equal(returnCount, 0, 'iter1, before return()');
+			iter1['return']();
+			st.equal(returnCount, 1, 'iter1, after return()'); // TODO
+
+			var iter2 = drop(makeBadIterator(), 1);
+			st.equal(returnCount, 1, 'iter2, before return()'); // TODO
+			iter2['return']();
+			st.equal(returnCount, 2, 'iter2, after return()'); // TODO
+
+			// 5 drops (i wish i had pipeline)
+			var iter3 = drop(
+				drop(
+					drop(
+						drop(
+							drop(
+								makeBadIterator(),
+								1
+							),
+							1
+						),
+						1
+					),
+					1
+				),
+				1
+			);
+			st.equal(returnCount, 2, 'iter3, before return()'); // TODO
+			iter3['return']();
+			st.equal(returnCount, 3, 'iter3, after return()'); // TODO
+
+			st.end();
+		});
+
+		t.test('262: test/built-ins/Iterator/prototype/drop/return-is-not-forwarded-after-exhaustion', { skip: !hasPropertyDescriptors }, function (st) {
+			var makeBadIterator = function makeBadIterator() {
+				return {
+					next: function next() {
+						return {
+							done: true,
+							value: undefined
+						};
+					},
+					'return': function () {
+						throw new SyntaxError();
+					}
+				};
+			};
+
+			var iter1 = drop(makeBadIterator(), 0); // TODO
+			st['throws'](
+				function () { iter1['return'](); },
+				SyntaxError,
+				'iter1, return() throws'
+			);
+			iter1.next();
+			iter1['return']();
+
+			var iter2 = drop(makeBadIterator(), 1);
+			st['throws'](
+				function () { iter2['return'](); },
+				SyntaxError,
+				'iter2, return() throws'
+			);
+			iter2.next();
+			iter2['return']();
+
+			// 5 drops (i wish i had pipeline)
+			var iter3 = drop(
+				drop(
+					drop(
+						drop(
+							drop(
+								makeBadIterator(),
+								1
+							),
+							1
+						),
+						1
+					),
+					1
+				),
+				1
+			);
+			st['throws'](
+				function () { iter3['return'](); },
+				SyntaxError,
+				'iter3, return() throws'
+			);
+			iter3.next();
+			iter3['return']();
+
+			var iter4 = drop(makeBadIterator(), 10);
+			st['throws'](
+				function () { iter4['return'](); },
+				SyntaxError,
+				'iter4, return() throws'
+			);
+			iter4.next();
+			iter4['return']();
+
+			st.end();
+		});
+	},
+	index: function () {
+		test('Iterator.prototype.' + fnName + ': index', function (t) {
+			module.exports.tests(index, 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	},
+	implementation: function () {
+		test('Iterator.prototype.' + fnName + ': implementation', function (t) {
+			module.exports.tests(callBind(impl), 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	},
+	shimmed: function () {
+		test('Iterator.prototype.' + fnName + ': shimmed', function (t) {
+			t.test('Function name', { skip: !functionsHaveNames }, function (st) {
+				st.equal(Iterator.prototype[fnName].name, fnName, 'Iterator#' + fnName + ' has name "' + fnName + '"');
+				st.end();
+			});
+
+			t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
+				et.equal(false, isEnumerable.call(Iterator.prototype, fnName), 'Iterator#' + fnName + ' is not enumerable');
+				et.end();
+			});
+
+			t.test('bad string/this value', { skip: !hasStrictMode }, function (st) {
+				st['throws'](function () { return Iterator.prototype[fnName].call(undefined, 'a'); }, TypeError, 'undefined is not an object');
+				st['throws'](function () { return Iterator.prototype[fnName].call(null, 'a'); }, TypeError, 'null is not an object');
+				st.end();
+			});
+
+			module.exports.tests(callBind(Iterator.prototype[fnName]), 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	}
+};

node_modules/es-iterator-helpers/test/Iterator.prototype.every.js

@@ -0,0 +1,289 @@
+'use strict';
+
+var defineProperties = require('define-properties');
+var test = require('tape');
+var callBind = require('call-bind');
+var functionsHaveNames = require('functions-have-names')();
+var hasStrictMode = require('has-strict-mode')();
+var forEach = require('for-each');
+var debug = require('object-inspect');
+var v = require('es-value-fixtures');
+var hasSymbols = require('has-symbols/shams')();
+var hasPropertyDescriptors = require('has-property-descriptors')();
+var iterate = require('iterate-iterator');
+
+var index = require('../Iterator.prototype.every');
+var impl = require('../Iterator.prototype.every/implementation');
+
+var fnName = 'every';
+
+var isEnumerable = Object.prototype.propertyIsEnumerable;
+
+var testIterator = require('./helpers/testIterator');
+
+module.exports = {
+	tests: function (every, name, t) {
+		t['throws'](
+			function () { return new every(); }, // eslint-disable-line new-cap
+			TypeError,
+			'`' + name + '` is not a constructor'
+		);
+
+		forEach(v.primitives.concat(v.objects), function (nonIterator) {
+			t['throws'](
+				function () { iterate(every(nonIterator, function () {})); },
+				TypeError,
+				debug(nonIterator) + ' is not an Object with a callable `next` method'
+			);
+
+			var badNext = { next: nonIterator };
+			t['throws'](
+				function () { iterate(every(badNext, function () {})); },
+				TypeError,
+				debug(badNext) + ' is not an Object with a callable `next` method'
+			);
+		});
+
+		forEach(v.nonFunctions, function (nonFunction) {
+			t['throws'](
+				function () { every({ next: function () {} }, nonFunction); },
+				TypeError,
+				debug(nonFunction) + ' is not a function'
+			);
+		});
+
+		t.test('observable lookups', { skip: !hasPropertyDescriptors }, function (st) {
+			var effects = [];
+
+			var obj = {};
+			Object.defineProperty(obj, 'next', {
+				configurable: true,
+				enumerable: true,
+				get: function next() {
+					effects.push('get next');
+					return function () {
+						return { done: true, value: undefined };
+					};
+				}
+			});
+
+			st['throws'](
+				function () { every(obj, null); },
+				TypeError
+			);
+
+			st.deepEqual(effects, []);
+
+			st.end();
+		});
+
+		t.test('actual iteration', { skip: !hasSymbols }, function (st) {
+			var arr = [1, 2, 3];
+			var iterator = callBind(arr[Symbol.iterator], arr);
+
+			st['throws'](
+				function () { return new every(iterator()); }, // eslint-disable-line new-cap
+				TypeError,
+				'`' + name + '` iterator is not a constructor'
+			);
+			st['throws'](
+				function () { return new every(iterator(), function () {}); }, // eslint-disable-line new-cap
+				TypeError,
+				'`' + name + '` iterator is not a constructor'
+			);
+
+			testIterator(iterator(), [1, 2, 3], st, 'original');
+			st.equal(every(iterator(), function () { return false; }), false, 'every for always-false');
+			st.equal(every(iterator(), function () { return true; }), true, 'every for always-true');
+			st.equal(every(iterator(), function (x, i) { return x === 2 && i === 1; }), false, 'every returns false for matching value/index');
+
+			st.test('test262: test/built-ins/Iterator/prototype/every/predicate-args', function (s2t) {
+				var assertionCount = 0;
+				var result = every(
+					['a', 'b', 'c'][Symbol.iterator](),
+					function (value, count) {
+						if (value === 'a') {
+							s2t.equal(count, 0);
+						} else if (value === 'b') {
+							s2t.equal(count, 1);
+						} else if (value === 'c') {
+							s2t.equal(count, 2);
+						} else {
+							s2t.fail('unexpected value');
+						}
+						assertionCount += 1;
+						return true;
+					}
+				);
+				s2t.equal(result, true, 'every returns true when all pass');
+				s2t.equal(assertionCount, 3, 'predicate called three times');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/every/predicate-this', function (s2t) {
+				var expectedThis = (function () { return this; }()); // eslint-disable-line no-invalid-this
+				var assertionCount = 0;
+				var result = every(
+					[0][Symbol.iterator](),
+					function () {
+						s2t.equal(this, expectedThis, 'predicate this is undefined'); // eslint-disable-line no-invalid-this
+						assertionCount += 1;
+						return true;
+					}
+				);
+				s2t.equal(result, true);
+				s2t.equal(assertionCount, 1);
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/every/predicate-returns-truthy', function (s2t) {
+				var result = every(
+					[0, 1, 2, 3, 4][Symbol.iterator](),
+					function () { return true; }
+				);
+				s2t.equal(result, true, 'every returns true when predicate always returns truthy');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/every/predicate-returns-falsey', function (s2t) {
+				var result = every(
+					[0, 1, 2, 3, 4][Symbol.iterator](),
+					function () { return false; }
+				);
+				s2t.equal(result, false, 'every returns false when predicate returns falsey');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/every/predicate-returns-truthy-then-falsey', function (s2t) {
+				var callCount = 0;
+				var returnCalled = false;
+				var values = [0, 1, 2, 3, 4];
+				var idx = 0;
+				var iter = {
+					next: function () {
+						if (idx < values.length) {
+							var val = values[idx];
+							idx += 1;
+							return { done: false, value: val };
+						}
+						return { done: true, value: undefined };
+					},
+					'return': function () {
+						returnCalled = true;
+						return { done: true, value: undefined };
+					}
+				};
+				var result = every(
+					iter,
+					function (value) {
+						callCount += 1;
+						return value < 3;
+					}
+				);
+				s2t.equal(result, false, 'every returns false when predicate returns falsey');
+				s2t.equal(callCount, 4, 'predicate called until falsey returned');
+				s2t.equal(returnCalled, true, 'iterator is closed');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/every/predicate-returns-non-boolean', function (s2t) {
+				// truthy non-boolean values
+				s2t.equal(every([1][Symbol.iterator](), function () { return 1; }), true, 'truthy number');
+				s2t.equal(every([1][Symbol.iterator](), function () { return 'yes'; }), true, 'truthy string');
+				s2t.equal(every([1][Symbol.iterator](), function () { return {}; }), true, 'truthy object');
+
+				// falsy non-boolean values
+				s2t.equal(every([1][Symbol.iterator](), function () { return 0; }), false, 'falsy number');
+				s2t.equal(every([1][Symbol.iterator](), function () { return ''; }), false, 'falsy string');
+				s2t.equal(every([1][Symbol.iterator](), function () { return null; }), false, 'null');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/every/predicate-throws', function (s2t) {
+				var returnCount = 0;
+				var testIter = {
+					next: function () {
+						return { done: false, value: 1 };
+					},
+					'return': function () {
+						returnCount += 1;
+						return { done: true };
+					}
+				};
+
+				var callbackCount = 0;
+				s2t['throws'](
+					function () {
+						every(testIter, function () {
+							callbackCount += 1;
+							throw new SyntaxError('predicate threw');
+						});
+					},
+					SyntaxError
+				);
+				s2t.equal(callbackCount, 1, 'predicate called once');
+				s2t.equal(returnCount, 1, 'iterator closed when predicate throws');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/every/iterator-already-exhausted', function (s2t) {
+				var iter = [][Symbol.iterator]();
+				var callbackCount = 0;
+				var result = every(iter, function () {
+					callbackCount += 1;
+					return true;
+				});
+				s2t.equal(result, true, 'every returns true for empty iterator');
+				s2t.equal(callbackCount, 0, 'predicate not called');
+
+				s2t.end();
+			});
+
+			st.end();
+		});
+	},
+	index: function () {
+		test('Iterator.prototype.' + fnName + ': index', function (t) {
+			module.exports.tests(index, 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	},
+	implementation: function () {
+		test('Iterator.prototype.' + fnName + ': implementation', function (t) {
+			module.exports.tests(callBind(impl), 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	},
+	shimmed: function () {
+		test('Iterator.prototype.' + fnName + ': shimmed', function (t) {
+			t.test('Function name', { skip: !functionsHaveNames }, function (st) {
+				st.equal(Iterator.prototype[fnName].name, fnName, 'Iterator#' + fnName + ' has name "' + fnName + '"');
+				st.end();
+			});
+
+			t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
+				et.equal(false, isEnumerable.call(Iterator.prototype, fnName), 'Iterator#' + fnName + ' is not enumerable');
+				et.end();
+			});
+
+			t.test('bad string/this value', { skip: !hasStrictMode }, function (st) {
+				st['throws'](function () { return Iterator.prototype[fnName].call(undefined, 'a'); }, TypeError, 'undefined is not an object');
+				st['throws'](function () { return Iterator.prototype[fnName].call(null, 'a'); }, TypeError, 'null is not an object');
+				st.end();
+			});
+
+			module.exports.tests(callBind(Iterator.prototype[fnName]), 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	}
+};

node_modules/es-iterator-helpers/test/Iterator.prototype.filter.js

@@ -0,0 +1,559 @@
+'use strict';
+
+var defineProperties = require('define-properties');
+var test = require('tape');
+var callBind = require('call-bind');
+var functionsHaveNames = require('functions-have-names')();
+var hasStrictMode = require('has-strict-mode')();
+var forEach = require('for-each');
+var debug = require('object-inspect');
+var v = require('es-value-fixtures');
+var hasSymbols = require('has-symbols/shams')();
+var hasPropertyDescriptors = require('has-property-descriptors')();
+var iterate = require('iterate-iterator');
+
+var index = require('../Iterator.prototype.filter');
+var impl = require('../Iterator.prototype.filter/implementation');
+
+var fnName = 'filter';
+
+var isEnumerable = Object.prototype.propertyIsEnumerable;
+
+var testIterator = require('./helpers/testIterator');
+
+module.exports = {
+	tests: function (filter, name, t) {
+		t['throws'](
+			function () { return new filter(); }, // eslint-disable-line new-cap
+			TypeError,
+			'`' + name + '` is not a constructor'
+		);
+
+		forEach(v.primitives.concat(v.objects), function (nonIterator) {
+			t['throws'](
+				function () { iterate(filter(nonIterator, function () {})); },
+				TypeError,
+				debug(nonIterator) + ' is not an Object with a callable `next` method'
+			);
+
+			var badNext = { next: nonIterator };
+			t['throws'](
+				function () { iterate(filter(badNext, function () {})); },
+				TypeError,
+				debug(badNext) + ' is not an Object with a callable `next` method'
+			);
+		});
+
+		forEach(v.nonFunctions, function (nonFunction) {
+			t['throws'](
+				function () { filter({ next: function () {} }, nonFunction); },
+				TypeError,
+				debug(nonFunction) + ' is not a function'
+			);
+		});
+
+		t.test('observable lookups', { skip: !hasPropertyDescriptors }, function (st) {
+			var effects = [];
+
+			var obj = {};
+			Object.defineProperty(obj, 'next', {
+				configurable: true,
+				enumerable: true,
+				get: function next() {
+					effects.push('get next');
+					return function () {
+						return { done: true, value: undefined };
+					};
+				}
+			});
+
+			st['throws'](
+				function () { filter(obj, null); },
+				TypeError
+			);
+
+			st.deepEqual(effects, []);
+
+			st.end();
+		});
+
+		t.test('actual iteration', { skip: !hasSymbols }, function (st) {
+			var arr = [1, 2, 3];
+			var iterator = callBind(arr[Symbol.iterator], arr);
+
+			st['throws'](
+				function () { return new filter(iterator()); }, // eslint-disable-line new-cap
+				TypeError,
+				'`' + name + '` iterator is not a constructor'
+			);
+			st['throws'](
+				function () { return new filter(iterator(), function () {}); }, // eslint-disable-line new-cap
+				TypeError,
+				'`' + name + '` iterator is not a constructor'
+			);
+
+			testIterator(iterator(), [1, 2, 3], st, 'original');
+			testIterator(filter(iterator(), function () { return false; }), [], st, 'filter for always-false');
+			testIterator(filter(iterator(), function () { return true; }), [1, 2, 3], st, 'filter for always-true');
+			testIterator(filter(iterator(), function (x, i) { return x === 2 && i === 1; }), [2], st, 'filter returns value for matching value/index');
+
+			st.end();
+		});
+
+		t.test('262: test/built-ins/Iterator/prototype/filter/predicate-args', function (st) {
+			var g = function g() {
+				var arr = ['a', 'b', 'c'];
+				var i = 0;
+				return {
+					next: function () {
+						try {
+							return {
+								value: arr[i],
+								done: i >= arr.length
+							};
+						} finally {
+							i += 1;
+						}
+					}
+				};
+			};
+			var assertionCount = 0;
+			var iter = filter(
+				g(),
+				function (value, count) {
+					if (value === 'a') {
+						st.equal(count, 0, 'first iteration');
+					} else if (value === 'b') {
+						st.equal(count, 1, 'second iteration');
+					} else if (value === 'c') {
+						st.equal(count, 2, 'third iteration');
+					} else {
+						st.fail('unexpected iteration');
+					}
+					assertionCount += 1;
+					return true;
+				}
+			);
+
+			st.equal(assertionCount, 0, 'prior to iteration');
+
+			testIterator(iter, ['a', 'b', 'c'], st, 'iteration');
+
+			st.equal(assertionCount, 3);
+
+			st.end();
+		});
+
+		t.test('262: test/built-ins/Iterator/prototype/filter/predicate-throws', function (st) {
+			var returnCalls = 0;
+
+			var iter = {
+				next: function () {
+					return {
+						done: false,
+						value: 1
+					};
+				},
+				'return': function () {
+					returnCalls += 1;
+					return {};
+				}
+			};
+
+			var callbackCalls = 0;
+			var iterator = filter(iter, function () {
+				callbackCalls += 1;
+				throw new SyntaxError();
+			});
+
+			st['throws'](function () { iterator.next(); }, SyntaxError, 'next() throws');
+
+			st.equal(callbackCalls, 1);
+			st.equal(returnCalls, 1);
+
+			st.end();
+		});
+
+		t.test('262: test/built-ins/Iterator/prototype/filter/predicate-throws-then-closing-iterator-also-throws', function (st) {
+			var iter = {
+				next: function next() {
+					return {
+						done: false,
+						value: 1
+					};
+				},
+				'return': function () {
+					throw new EvalError();
+				}
+			};
+
+			var iterator = filter(iter, function () {
+				throw new SyntaxError();
+			});
+
+			st['throws'](
+				function () { iterator.next(); },
+				SyntaxError,
+				'when the predicate and return() both throw, the predicate’s exception wins'
+			);
+
+			st.end();
+		});
+
+		t.test('262: test/built-ins/Iterator/prototype/filter/get-return-method-throws', { skip: !hasPropertyDescriptors }, function (st) {
+			var badIterator = {
+				next: function next() {
+					return {
+						done: false,
+						value: 1
+					};
+				}
+			};
+
+			Object.defineProperty(badIterator, 'return', { get: function () { throw new SyntaxError(); } });
+
+			var iter = filter(badIterator, function () { return true; });
+			iter.next();
+
+			st['throws'](
+				function () { iter['return'](); },
+				SyntaxError,
+				'gets the `return` method, whose getter throws'
+			);
+
+			st.end();
+		});
+
+		t.test('262: test/built-ins/Iterator/prototype/drop/return-is-forwarded', function (st) {
+			var returnCount = 0;
+
+			var badIterator = {
+				next: function next() {
+					return {
+						done: false,
+						value: 1
+					};
+				},
+				'return': function () {
+					returnCount += 1;
+					return {};
+				}
+			};
+
+			var iter1 = filter(badIterator, function () { return false; });
+			st.equal(returnCount, 0, 'iter1, before return()');
+			iter1['return']();
+			st.equal(returnCount, 1, 'iter1, after return()');
+
+			st.end();
+		});
+
+		t.test('262: test/built-ins/Iterator/prototype/drop/return-is-not-forwarded-after-exhaustion', { skip: !hasPropertyDescriptors }, function (st) {
+			var makeBadIterator = function makeBadIterator() {
+				return {
+					next: function next() {
+						return {
+							done: true,
+							value: undefined
+						};
+					},
+					'return': function () {
+						throw new SyntaxError();
+					}
+				};
+			};
+
+			var iter1 = filter(makeBadIterator(), function () { return true; });
+			st['throws'](
+				function () { iter1['return'](); },
+				SyntaxError,
+				'iter1, return() throws'
+			);
+			iter1.next();
+			iter1['return']();
+
+			// 3 filters (i wish i had pipeline)
+			var iter2 = filter(
+				filter(
+					filter(
+						makeBadIterator(),
+						function () { return true; }
+					),
+					function () { return true; }
+				),
+				function () { return true; }
+			);
+			st['throws']( // TODO
+				function () { iter2['return'](); },
+				SyntaxError,
+				'iter2, return() throws'
+			);
+			iter2.next();
+			iter2['return']();
+
+			st.end();
+		});
+
+		t.test('262: predicate-this', { skip: !hasSymbols }, function (st) {
+			var thisValue;
+			var iter = filter(
+				[1][Symbol.iterator](),
+				function () {
+					thisValue = this;
+					return true;
+				}
+			);
+			iter.next();
+			st.equal(thisValue, undefined, 'predicate this is undefined');
+
+			st.end();
+		});
+
+		t.test('262: predicate-returns-non-boolean', { skip: !hasSymbols }, function (st) {
+			// truthy non-boolean values should pass
+			testIterator(
+				filter([1, 2, 3][Symbol.iterator](), function () { return 1; }),
+				[1, 2, 3],
+				st,
+				'truthy number passes'
+			);
+			testIterator(
+				filter([1, 2, 3][Symbol.iterator](), function () { return 'yes'; }),
+				[1, 2, 3],
+				st,
+				'truthy string passes'
+			);
+			testIterator(
+				filter([1, 2, 3][Symbol.iterator](), function () { return {}; }),
+				[1, 2, 3],
+				st,
+				'truthy object passes'
+			);
+
+			// falsy non-boolean values should fail
+			testIterator(
+				filter([1, 2, 3][Symbol.iterator](), function () { return 0; }),
+				[],
+				st,
+				'falsy number fails'
+			);
+			testIterator(
+				filter([1, 2, 3][Symbol.iterator](), function () { return ''; }),
+				[],
+				st,
+				'falsy string fails'
+			);
+			testIterator(
+				filter([1, 2, 3][Symbol.iterator](), function () { return null; }),
+				[],
+				st,
+				'null fails'
+			);
+
+			st.end();
+		});
+
+		t.test('262: result is iterator', { skip: !hasSymbols }, function (st) {
+			var iterator = filter([1, 2][Symbol.iterator](), function () { return true; });
+			st.equal(typeof iterator.next, 'function', 'has next method');
+			st.equal(typeof iterator[Symbol.iterator], 'function', 'has Symbol.iterator method');
+			st.equal(iterator[Symbol.iterator](), iterator, 'Symbol.iterator returns itself');
+
+			st.end();
+		});
+
+		t.test('262: get next method only once', { skip: !hasPropertyDescriptors }, function (st) {
+			var nextGets = 0;
+			var testIter = {};
+			Object.defineProperty(testIter, 'next', {
+				get: function () {
+					nextGets += 1;
+					return function () {
+						return { done: true, value: undefined };
+					};
+				}
+			});
+
+			var iter = filter(testIter, function () { return true; });
+			st.equal(nextGets, 1, 'next retrieved once on creation');
+			iter.next();
+			st.equal(nextGets, 1, 'next not retrieved again');
+
+			st.end();
+		});
+
+		t.test('262: get next method throws', { skip: !hasPropertyDescriptors }, function (st) {
+			var testIter = {};
+			Object.defineProperty(testIter, 'next', {
+				get: function () {
+					throw new EvalError('next getter threw');
+				}
+			});
+
+			st['throws'](
+				function () { filter(testIter, function () { return true; }); },
+				EvalError,
+				'throws when getting next throws'
+			);
+
+			st.end();
+		});
+
+		t.test('262: next method returns non-object throws', function (st) {
+			var badIterator = {
+				next: function () {
+					return null;
+				}
+			};
+
+			var iter = filter(badIterator, function () { return true; });
+			st['throws'](function () { iter.next(); }, TypeError, 'throws when next returns null');
+
+			st.end();
+		});
+
+		t.test('262: next method returns throwing done', { skip: !hasPropertyDescriptors }, function (st) {
+			var throwingIterator = {
+				next: function () {
+					var result = { value: 1 };
+					Object.defineProperty(result, 'done', {
+						get: function () {
+							throw new EvalError('done getter threw');
+						}
+					});
+					return result;
+				}
+			};
+
+			var iter = filter(throwingIterator, function () { return true; });
+			st['throws'](function () { iter.next(); }, EvalError, 'throws when done getter throws');
+
+			st.end();
+		});
+
+		t.test('262: next method returns throwing value', { skip: !hasPropertyDescriptors }, function (st) {
+			var throwingIterator = {
+				next: function () {
+					var result = { done: false };
+					Object.defineProperty(result, 'value', {
+						get: function () {
+							throw new EvalError('value getter threw');
+						}
+					});
+					return result;
+				}
+			};
+
+			var iter = filter(throwingIterator, function () { return true; });
+			st['throws'](function () { iter.next(); }, EvalError, 'throws when value getter throws');
+
+			st.end();
+		});
+
+		t.test('262: next method throws', function (st) {
+			var throwingIterator = {
+				next: function () {
+					throw new EvalError('next threw');
+				}
+			};
+
+			var iter = filter(throwingIterator, function () { return true; });
+			st['throws'](function () { iter.next(); }, EvalError, 'throws error from next');
+
+			st.end();
+		});
+
+		t.test('262: iterator already exhausted', function (st) {
+			var testIter = {
+				next: function () {
+					return { done: true, value: undefined };
+				}
+			};
+
+			var predicateCalls = 0;
+			var iter = filter(testIter, function () {
+				predicateCalls += 1;
+				return true;
+			});
+
+			var result = iter.next();
+			st.equal(result.done, true, 'done is true');
+			st.equal(result.value, undefined, 'value is undefined');
+			st.equal(predicateCalls, 0, 'predicate not called for exhausted iterator');
+
+			st.end();
+		});
+
+		t.test('262: throws TypeError when generator is running', function (st) {
+			var reentrantIterator;
+			var testIter = {
+				next: function () {
+					reentrantIterator.next();
+					return { done: false, value: 1 };
+				}
+			};
+
+			reentrantIterator = filter(testIter, function () { return true; });
+			st['throws'](function () { reentrantIterator.next(); }, TypeError, 'throws on reentrant next()');
+
+			st.end();
+		});
+
+		t.test('262: exhaustion does not call return', function (st) {
+			var returnCalls = 0;
+
+			var testIter = {
+				next: function () {
+					return { done: true, value: undefined };
+				},
+				'return': function () {
+					returnCalls += 1;
+					return { done: true, value: undefined };
+				}
+			};
+
+			var iter = filter(testIter, function () { return true; });
+			iter.next();
+			st.equal(returnCalls, 0, 'return not called on exhaustion');
+
+			st.end();
+		});
+	},
+	index: function () {
+		test('Iterator.prototype.' + fnName + ': index', function (t) {
+			module.exports.tests(index, 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	},
+	implementation: function () {
+		test('Iterator.prototype.' + fnName + ': implementation', function (t) {
+			module.exports.tests(callBind(impl), 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	},
+	shimmed: function () {
+		test('Iterator.prototype.' + fnName + ': shimmed', function (t) {
+			t.test('Function name', { skip: !functionsHaveNames }, function (st) {
+				st.equal(Iterator.prototype[fnName].name, fnName, 'Iterator#' + fnName + ' has name "' + fnName + '"');
+				st.end();
+			});
+
+			t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
+				et.equal(false, isEnumerable.call(Iterator.prototype, fnName), 'Iterator#' + fnName + ' is not enumerable');
+				et.end();
+			});
+
+			t.test('bad string/this value', { skip: !hasStrictMode }, function (st) {
+				st['throws'](function () { return Iterator.prototype[fnName].call(undefined, 'a'); }, TypeError, 'undefined is not an object');
+				st['throws'](function () { return Iterator.prototype[fnName].call(null, 'a'); }, TypeError, 'null is not an object');
+				st.end();
+			});
+
+			module.exports.tests(callBind(Iterator.prototype[fnName]), 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	}
+};

node_modules/es-iterator-helpers/test/Iterator.prototype.find.js

@@ -0,0 +1,286 @@
+'use strict';
+
+var defineProperties = require('define-properties');
+var test = require('tape');
+var callBind = require('call-bind');
+var functionsHaveNames = require('functions-have-names')();
+var hasStrictMode = require('has-strict-mode')();
+var forEach = require('for-each');
+var debug = require('object-inspect');
+var v = require('es-value-fixtures');
+var hasSymbols = require('has-symbols/shams')();
+var iterate = require('iterate-iterator');
+
+var index = require('../Iterator.prototype.find');
+var impl = require('../Iterator.prototype.find/implementation');
+
+var fnName = 'find';
+
+var isEnumerable = Object.prototype.propertyIsEnumerable;
+
+var testIterator = require('./helpers/testIterator');
+
+module.exports = {
+	tests: function (find, name, t) {
+		t['throws'](
+			function () { return new find(); }, // eslint-disable-line new-cap
+			TypeError,
+			'`' + name + '` is not a constructor'
+		);
+
+		forEach(v.primitives.concat(v.objects), function (nonIterator) {
+			t['throws'](
+				function () { iterate(find(nonIterator, function () {})); },
+				TypeError,
+				debug(nonIterator) + ' is not an Object with a callable `next` method'
+			);
+
+			var badNext = { next: nonIterator };
+			t['throws'](
+				function () { iterate(find(badNext, function () {})); },
+				TypeError,
+				debug(badNext) + ' is not an Object with a callable `next` method'
+			);
+		});
+
+		forEach(v.nonFunctions, function (nonFunction) {
+			t['throws'](
+				function () { find({ next: function () {} }, nonFunction); },
+				TypeError,
+				debug(nonFunction) + ' is not a function'
+			);
+		});
+
+		t.test('actual iteration', { skip: !hasSymbols }, function (st) {
+			var arr = [1, 2, 3];
+			var iterator = callBind(arr[Symbol.iterator], arr);
+
+			st['throws'](
+				function () { return new find(iterator()); }, // eslint-disable-line new-cap
+				TypeError,
+				'`' + name + '` iterator is not a constructor'
+			);
+			st['throws'](
+				function () { return new find(iterator(), function () {}); }, // eslint-disable-line new-cap
+				TypeError,
+				'`' + name + '` iterator is not a constructor'
+			);
+
+			testIterator(iterator(), [1, 2, 3], st, 'original');
+			st.equal(find(iterator(), function () { return false; }), undefined, 'find for always-false');
+			st.equal(find(iterator(), function () { return true; }), 1, 'find for always-true');
+			st.equal(find(iterator(), function (x, i) { return x === 2 && i === 1; }), 2, 'find returns value for matching value/index');
+
+			st.test('test262: test/built-ins/Iterator/prototype/find/predicate-args', function (s2t) {
+				var assertionCount = 0;
+				var result = find(
+					['a', 'b', 'c'][Symbol.iterator](),
+					function (value, count) {
+						if (value === 'a') {
+							s2t.equal(count, 0);
+						} else if (value === 'b') {
+							s2t.equal(count, 1);
+						} else if (value === 'c') {
+							s2t.equal(count, 2);
+						} else {
+							s2t.fail('unexpected value');
+						}
+						assertionCount += 1;
+						return false;
+					}
+				);
+				s2t.equal(result, undefined, 'find returns undefined when none match');
+				s2t.equal(assertionCount, 3, 'predicate called three times');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/find/predicate-this', function (s2t) {
+				var expectedThis = (function () { return this; }()); // eslint-disable-line no-invalid-this
+				var assertionCount = 0;
+				var result = find(
+					[0][Symbol.iterator](),
+					function () {
+						s2t.equal(this, expectedThis, 'predicate this is undefined'); // eslint-disable-line no-invalid-this
+						assertionCount += 1;
+						return true;
+					}
+				);
+				s2t.equal(result, 0);
+				s2t.equal(assertionCount, 1);
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/find/predicate-returns-truthy', function (s2t) {
+				var callCount = 0;
+				var returnCalled = false;
+				var values = [0, 1, 2];
+				var idx = 0;
+				var iter = {
+					next: function () {
+						if (idx < values.length) {
+							var val = values[idx];
+							idx += 1;
+							return { done: false, value: val };
+						}
+						return { done: true, value: undefined };
+					},
+					'return': function () {
+						returnCalled = true;
+						return { done: true, value: undefined };
+					}
+				};
+				var result = find(
+					iter,
+					function () {
+						callCount += 1;
+						return true;
+					}
+				);
+				s2t.equal(result, 0, 'find returns first value when predicate returns truthy');
+				s2t.equal(callCount, 1, 'predicate called once');
+				s2t.equal(returnCalled, true, 'iterator is closed');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/find/predicate-returns-falsey', function (s2t) {
+				var result = find(
+					[0, 1, 2, 3, 4][Symbol.iterator](),
+					function () { return false; }
+				);
+				s2t.equal(result, undefined, 'find returns undefined when predicate always returns falsey');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/find/predicate-returns-falsey-then-truthy', function (s2t) {
+				var callCount = 0;
+				var returnCalled = false;
+				var values = [0, 1, 2, 3, 4];
+				var idx = 0;
+				var iter = {
+					next: function () {
+						if (idx < values.length) {
+							var val = values[idx];
+							idx += 1;
+							return { done: false, value: val };
+						}
+						return { done: true, value: undefined };
+					},
+					'return': function () {
+						returnCalled = true;
+						return { done: true, value: undefined };
+					}
+				};
+				var result = find(
+					iter,
+					function (value) {
+						callCount += 1;
+						return value >= 3;
+					}
+				);
+				s2t.equal(result, 3, 'find returns matching value');
+				s2t.equal(callCount, 4, 'predicate called until truthy returned');
+				s2t.equal(returnCalled, true, 'iterator is closed');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/find/predicate-returns-non-boolean', function (s2t) {
+				// truthy non-boolean values find the first element
+				s2t.equal(find([1, 2][Symbol.iterator](), function () { return 1; }), 1, 'truthy number');
+				s2t.equal(find([1, 2][Symbol.iterator](), function () { return 'yes'; }), 1, 'truthy string');
+				s2t.equal(find([1, 2][Symbol.iterator](), function () { return {}; }), 1, 'truthy object');
+
+				// falsy non-boolean values return undefined
+				s2t.equal(find([1][Symbol.iterator](), function () { return 0; }), undefined, 'falsy number');
+				s2t.equal(find([1][Symbol.iterator](), function () { return ''; }), undefined, 'falsy string');
+				s2t.equal(find([1][Symbol.iterator](), function () { return null; }), undefined, 'null');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/find/predicate-throws', function (s2t) {
+				var returnCount = 0;
+				var testIter = {
+					next: function () {
+						return { done: false, value: 1 };
+					},
+					'return': function () {
+						returnCount += 1;
+						return { done: true };
+					}
+				};
+
+				var callbackCount = 0;
+				s2t['throws'](
+					function () {
+						find(testIter, function () {
+							callbackCount += 1;
+							throw new SyntaxError('predicate threw');
+						});
+					},
+					SyntaxError
+				);
+				s2t.equal(callbackCount, 1, 'predicate called once');
+				s2t.equal(returnCount, 1, 'iterator closed when predicate throws');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/find/iterator-already-exhausted', function (s2t) {
+				var iter = [][Symbol.iterator]();
+				var callbackCount = 0;
+				var result = find(iter, function () {
+					callbackCount += 1;
+					return true;
+				});
+				s2t.equal(result, undefined, 'find returns undefined for empty iterator');
+				s2t.equal(callbackCount, 0, 'predicate not called');
+
+				s2t.end();
+			});
+
+			st.end();
+		});
+	},
+	index: function () {
+		test('Iterator.prototype.' + fnName + ': index', function (t) {
+			module.exports.tests(index, 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	},
+	implementation: function () {
+		test('Iterator.prototype.' + fnName + ': implementation', function (t) {
+			module.exports.tests(callBind(impl), 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	},
+	shimmed: function () {
+		test('Iterator.prototype.' + fnName + ': shimmed', function (t) {
+			t.test('Function name', { skip: !functionsHaveNames }, function (st) {
+				st.equal(Iterator.prototype[fnName].name, fnName, 'Iterator#' + fnName + ' has name "' + fnName + '"');
+				st.end();
+			});
+
+			t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
+				et.equal(false, isEnumerable.call(Iterator.prototype, fnName), 'Iterator#' + fnName + ' is not enumerable');
+				et.end();
+			});
+
+			t.test('bad string/this value', { skip: !hasStrictMode }, function (st) {
+				st['throws'](function () { return Iterator.prototype[fnName].call(undefined, 'a'); }, TypeError, 'undefined is not an object');
+				st['throws'](function () { return Iterator.prototype[fnName].call(null, 'a'); }, TypeError, 'null is not an object');
+				st.end();
+			});
+
+			module.exports.tests(callBind(Iterator.prototype[fnName]), 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	}
+};

node_modules/es-iterator-helpers/test/Iterator.prototype.flatMap.js

@@ -0,0 +1,238 @@
+'use strict';
+
+var defineProperties = require('define-properties');
+var test = require('tape');
+var callBind = require('call-bind');
+var functionsHaveNames = require('functions-have-names')();
+var hasStrictMode = require('has-strict-mode')();
+var forEach = require('for-each');
+var debug = require('object-inspect');
+var v = require('es-value-fixtures');
+var hasSymbols = require('has-symbols/shams')();
+var iterate = require('iterate-iterator');
+
+var StringToCodePoints = require('es-abstract/2025/StringToCodePoints');
+
+var index = require('../Iterator.prototype.flatMap');
+var impl = require('../Iterator.prototype.flatMap/implementation');
+
+var fnName = 'flatMap';
+
+var isEnumerable = Object.prototype.propertyIsEnumerable;
+
+var testIterator = require('./helpers/testIterator');
+
+module.exports = {
+	tests: function (flatMap, name, t) {
+		t['throws'](
+			function () { return new flatMap(); }, // eslint-disable-line new-cap
+			TypeError,
+			'`' + name + '` is not a constructor'
+		);
+
+		forEach(v.primitives.concat(v.objects), function (nonIterator) {
+			t['throws'](
+				function () { iterate(flatMap(nonIterator, function () {})); },
+				TypeError,
+				debug(nonIterator) + ' is not an Object with a callable `next` method'
+			);
+
+			var badNext = { next: nonIterator };
+			t['throws'](
+				function () { iterate(flatMap(badNext, function () {})); },
+				TypeError,
+				debug(badNext) + ' is not an Object with a callable `next` method'
+			);
+		});
+
+		forEach(v.nonFunctions, function (nonFunction) {
+			t['throws'](
+				function () { flatMap({ next: function () {} }, nonFunction); },
+				TypeError,
+				debug(nonFunction) + ' is not a function'
+			);
+		});
+
+		t.test('actual iteration', { skip: !hasSymbols }, function (st) {
+			var arr = [1, 2, 3];
+			var iterator = callBind(arr[Symbol.iterator], arr);
+
+			st['throws'](
+				function () { return new flatMap(iterator()); }, // eslint-disable-line new-cap
+				TypeError,
+				'`' + name + '` iterator is not a constructor'
+			);
+			st['throws'](
+				function () { return new flatMap(iterator(), function () {}); }, // eslint-disable-line new-cap
+				TypeError,
+				'`' + name + '` iterator is not a constructor'
+			);
+
+			testIterator(iterator(), [1, 2, 3], st, 'original');
+
+			var nonIterableFlatMap = flatMap(iterator(), function (x) { return x; });
+			st['throws'](
+				function () { nonIterableFlatMap.next(); },
+				TypeError,
+				'non-iterable return value throws'
+			);
+
+			forEach(v.strings, function (string) {
+				st['throws'](
+					function () { flatMap(iterator(), function () { return string; }).next(); },
+					TypeError,
+					'non-object return value throws even if iterable (' + debug(string) + ')'
+				);
+
+				testIterator(
+					flatMap(iterator(), function () { return Object(string); }),
+					[].concat(StringToCodePoints(string), StringToCodePoints(string), StringToCodePoints(string)),
+					st,
+					'boxed string (' + debug(string) + ')'
+				);
+			});
+
+			testIterator(flatMap(iterator(), function (x) { return [x][Symbol.iterator](); }), [1, 2, 3], st, 'identity mapper in array iterator');
+			testIterator(flatMap(iterator(), function (x) { return [2 * x][Symbol.iterator](); }), [2, 4, 6], st, 'doubler mapper in array iterator');
+
+			testIterator(flatMap(iterator(), function () { return []; }), [], st, 'empty mapper in nested array iterator');
+			testIterator(flatMap(iterator(), function (x) { return [[x, x + 1]][Symbol.iterator](); }), [[1, 2], [2, 3], [3, 4]], st, 'identity mapper in nested array iterator');
+			testIterator(flatMap(iterator(), function (x) { return [[2 * x, 2 * (x + 1)]][Symbol.iterator](); }), [[2, 4], [4, 6], [6, 8]], st, 'doubler mapper in nested array iterator');
+
+			testIterator(flatMap([0, 1, 2, 3][Symbol.iterator](), function (value) {
+				var result = [];
+				for (var i = 0; i < value; ++i) {
+					result.push(value);
+				}
+				return result;
+			}), [1, 2, 2, 3, 3, 3], st, 'test262: test/built-ins/Iterator/prototype/flatMap/flattens-iteratable');
+
+			testIterator(flatMap([0, 1, 2, 3][Symbol.iterator](), function (value) {
+				var i = 0;
+				return {
+					next: function () {
+						if (i < value) {
+							i += 1;
+							return {
+								value: value,
+								done: false
+							};
+						}
+						return {
+							value: undefined,
+							done: true
+						};
+
+					}
+				};
+			}), [1, 2, 2, 3, 3, 3], st, 'test262: test/built-ins/Iterator/prototype/flatMap/flattens-iterator');
+
+			testIterator(flatMap([0][Symbol.iterator](), function () {
+				var n = [0, 1, 2][Symbol.iterator]();
+
+				var ret = {
+					next: function next() {
+						return n.next();
+					}
+				};
+				ret[Symbol.iterator] = null;
+				return ret;
+			}), [0, 1, 2], st, 'test262: test/built-ins/Iterator/prototype/flatMap/iterable-to-iterator-fallback');
+
+			var counts = [];
+			testIterator(flatMap(['a', 'b', 'c', 'd', 'e'][Symbol.iterator](), function (value, count) {
+				counts.push(count);
+
+				if (value === 'a' || value === 'b') {
+					return [0];
+				}
+				if (value === 'c') {
+					return [1, 2];
+				}
+				if (value === 'd') {
+					return [3, 4, 5];
+				}
+				if (value === 'e') {
+					return [6, 7, 8, 9];
+				}
+
+				return st.fail('got unexpected value: ' + debug(v));
+			}), [0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9], st, 'test262: test/built-ins/Iterator/prototype/flatMap/mapper-args');
+			st.deepEqual(counts, [0, 1, 2, 3, 4], 'count values are as expected');
+
+			st.test('return protocol', function (s2t) {
+				var returnCount = 0;
+
+				var iter = flatMap([0][Symbol.iterator](), function () {
+					return {
+						next: function next() {
+							return {
+								done: false,
+								value: 1
+							};
+						},
+						'return': function () {
+							returnCount += 1;
+							return {};
+						}
+					};
+				});
+				s2t.equal(returnCount, 0, '`return` is not called yet');
+
+				s2t.deepEqual(iter.next(), {
+					done: false,
+					value: 1
+				});
+
+				s2t.equal(returnCount, 0, '`return` is not called after first yield');
+
+				iter['return']();
+				s2t.equal(returnCount, 1, '`return` is called when iterator return is called');
+
+				iter['return']();
+				s2t.equal(returnCount, 1, '`return` is not called again when iterator return is called again');
+
+				s2t.end();
+			});
+
+			st.end();
+		});
+	},
+	index: function () {
+		test('Iterator.prototype.' + fnName + ': index', function (t) {
+			module.exports.tests(index, 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	},
+	implementation: function () {
+		test('Iterator.prototype.' + fnName + ': implementation', function (t) {
+			module.exports.tests(callBind(impl), 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	},
+	shimmed: function () {
+		test('Iterator.prototype.' + fnName + ': shimmed', function (t) {
+			t.test('Function name', { skip: !functionsHaveNames }, function (st) {
+				st.equal(Iterator.prototype[fnName].name, fnName, 'Iterator#' + fnName + ' has name "' + fnName + '"');
+				st.end();
+			});
+
+			t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
+				et.equal(false, isEnumerable.call(Iterator.prototype, fnName), 'Iterator#' + fnName + ' is not enumerable');
+				et.end();
+			});
+
+			t.test('bad string/this value', { skip: !hasStrictMode }, function (st) {
+				st['throws'](function () { return Iterator.prototype[fnName].call(undefined, 'a'); }, TypeError, 'undefined is not an object');
+				st['throws'](function () { return Iterator.prototype[fnName].call(null, 'a'); }, TypeError, 'null is not an object');
+				st.end();
+			});
+
+			module.exports.tests(callBind(Iterator.prototype[fnName]), 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	}
+};

node_modules/es-iterator-helpers/test/Iterator.prototype.forEach.js

@@ -0,0 +1,232 @@
+'use strict';
+
+var defineProperties = require('define-properties');
+var test = require('tape');
+var callBind = require('call-bind');
+var functionsHaveNames = require('functions-have-names')();
+var hasStrictMode = require('has-strict-mode')();
+var forEachNormal = require('for-each');
+var debug = require('object-inspect');
+var v = require('es-value-fixtures');
+var hasSymbols = require('has-symbols/shams')();
+var iterate = require('iterate-iterator');
+
+var index = require('../Iterator.prototype.forEach');
+var impl = require('../Iterator.prototype.forEach/implementation');
+
+var fnName = 'forEach';
+
+var isEnumerable = Object.prototype.propertyIsEnumerable;
+
+var testIterator = require('./helpers/testIterator');
+
+module.exports = {
+	tests: function (forEach, name, t) {
+		t['throws'](
+			function () { return new forEach(); }, // eslint-disable-line new-cap
+			TypeError,
+			'`' + name + '` is not a constructor'
+		);
+
+		forEachNormal(v.primitives.concat(v.objects), function (nonIterator) {
+			t['throws'](
+				function () { iterate(forEach(nonIterator, function () {})); },
+				TypeError,
+				debug(nonIterator) + ' is not an Object with a callable `next` method'
+			);
+
+			var badNext = { next: nonIterator };
+			t['throws'](
+				function () { iterate(forEach(badNext, function () {})); },
+				TypeError,
+				debug(badNext) + ' is not an Object with a callable `next` method'
+			);
+		});
+
+		forEachNormal(v.nonFunctions, function (nonFunction) {
+			t['throws'](
+				function () { forEach({ next: function () {} }, nonFunction); },
+				TypeError,
+				debug(nonFunction) + ' is not a function'
+			);
+		});
+
+		t.test('actual iteration', { skip: !hasSymbols }, function (st) {
+			var arr = [1, 2, 3];
+			var iterator = callBind(arr[Symbol.iterator], arr);
+
+			st['throws'](
+				function () { return new forEach(iterator()); }, // eslint-disable-line new-cap
+				TypeError,
+				'`' + name + '` iterator is not a constructor'
+			);
+			st['throws'](
+				function () { return new forEach(iterator(), function () {}); }, // eslint-disable-line new-cap
+				TypeError,
+				'`' + name + '` iterator is not a constructor'
+			);
+
+			testIterator(iterator(), [1, 2, 3], st, 'original');
+
+			var results = [];
+			var ret = forEach(
+				iterator(),
+				function (x, i) {
+
+					results.push({ value: x, count: i, 'this': this, args: arguments.length });
+				}
+			);
+
+			st.equal(ret, undefined, 'returns undefined');
+
+			st.deepEqual(
+				results,
+				[
+					{ value: 1, count: 0, 'this': undefined, args: 2 },
+					{ value: 2, count: 1, 'this': undefined, args: 2 },
+					{ value: 3, count: 2, 'this': undefined, args: 2 }
+				],
+				'forEach callback receives the expected values'
+			);
+
+			st.test('test262: test/built-ins/Iterator/prototype/forEach/fn-args', function (s2t) {
+				var assertionCount = 0;
+				var result = forEach(
+					['a', 'b', 'c'][Symbol.iterator](),
+					function (value, count) {
+						if (value === 'a') {
+							s2t.equal(count, 0);
+						} else if (value === 'b') {
+							s2t.equal(count, 1);
+						} else if (value === 'c') {
+							s2t.equal(count, 2);
+						} else {
+							s2t.fail('unexpected value');
+						}
+						assertionCount += 1;
+					}
+				);
+				s2t.equal(result, undefined, 'forEach returns undefined');
+				s2t.equal(assertionCount, 3, 'callback called three times');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/forEach/fn-this', function (s2t) {
+				var expectedThis = (function () { return this; }()); // eslint-disable-line no-invalid-this
+				var assertionCount = 0;
+				var result = forEach(
+					[0][Symbol.iterator](),
+					function () {
+						s2t.equal(this, expectedThis, 'fn this is undefined'); // eslint-disable-line no-invalid-this
+						assertionCount += 1;
+					}
+				);
+				s2t.equal(result, undefined);
+				s2t.equal(assertionCount, 1);
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/forEach/fn-called-for-each-yielded-value', function (s2t) {
+				var values = [];
+				forEach(
+					[1, 2, 3, 4, 5][Symbol.iterator](),
+					function (value) { values.push(value); }
+				);
+				s2t.deepEqual(values, [1, 2, 3, 4, 5], 'callback called for each value');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/forEach/fn-throws', function (s2t) {
+				var returnCount = 0;
+				var testIter = {
+					next: function () {
+						return { done: false, value: 1 };
+					},
+					'return': function () {
+						returnCount += 1;
+						return { done: true };
+					}
+				};
+
+				var callbackCount = 0;
+				s2t['throws'](
+					function () {
+						forEach(testIter, function () {
+							callbackCount += 1;
+							throw new SyntaxError('callback threw');
+						});
+					},
+					SyntaxError
+				);
+				s2t.equal(callbackCount, 1, 'callback called once');
+				s2t.equal(returnCount, 1, 'iterator closed when callback throws');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/forEach/iterator-already-exhausted', function (s2t) {
+				var iter = [][Symbol.iterator]();
+				var callbackCount = 0;
+				var result = forEach(iter, function () {
+					callbackCount += 1;
+				});
+				s2t.equal(result, undefined, 'forEach returns undefined for empty iterator');
+				s2t.equal(callbackCount, 0, 'callback not called');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/forEach/result-is-undefined', function (s2t) {
+				var result = forEach(
+					[1, 2, 3][Symbol.iterator](),
+					function () {}
+				);
+				s2t.equal(result, undefined, 'forEach returns undefined');
+
+				s2t.end();
+			});
+
+			st.end();
+		});
+	},
+	index: function () {
+		test('Iterator.prototype.' + fnName + ': index', function (t) {
+			module.exports.tests(index, 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	},
+	implementation: function () {
+		test('Iterator.prototype.' + fnName + ': implementation', function (t) {
+			module.exports.tests(callBind(impl), 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	},
+	shimmed: function () {
+		test('Iterator.prototype.' + fnName + ': shimmed', function (t) {
+			t.test('Function name', { skip: !functionsHaveNames }, function (st) {
+				st.equal(Iterator.prototype[fnName].name, fnName, 'Iterator#' + fnName + ' has name "' + fnName + '"');
+				st.end();
+			});
+
+			t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
+				et.equal(false, isEnumerable.call(Iterator.prototype, fnName), 'Iterator#' + fnName + ' is not enumerable');
+				et.end();
+			});
+
+			t.test('bad string/this value', { skip: !hasStrictMode }, function (st) {
+				st['throws'](function () { return Iterator.prototype[fnName].call(undefined, 'a'); }, TypeError, 'undefined is not an object');
+				st['throws'](function () { return Iterator.prototype[fnName].call(null, 'a'); }, TypeError, 'null is not an object');
+				st.end();
+			});
+
+			module.exports.tests(callBind(Iterator.prototype[fnName]), 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	}
+};

node_modules/es-iterator-helpers/test/Iterator.prototype.js

@@ -0,0 +1,72 @@
+'use strict';
+
+var defineProperties = require('define-properties');
+var test = require('tape');
+var hasSymbols = require('has-symbols')();
+var hasToStringTag = require('has-tostringtag');
+var functionsHaveNames = require('functions-have-names')();
+var functionsHaveConfigurableNames = require('functions-have-names').functionsHaveConfigurableNames();
+
+var index = require('../Iterator.prototype');
+var impl = require('../Iterator.prototype/implementation');
+
+var isEnumerable = Object.prototype.propertyIsEnumerable;
+
+var $Iterator = require('../Iterator/implementation');
+
+module.exports = {
+	tests: function (proto, name, t) {
+		t.notEqual(proto, null, 'is not null');
+		t.equal(typeof proto, 'object', 'is an object');
+
+		t.test('Symbol.iterator', { skip: !hasSymbols }, function (st) {
+			st.equal(typeof proto[Symbol.iterator], 'function', 'has a `Symbol.iterator` method');
+			st.equal(
+				proto[Symbol.iterator].name,
+				'[Symbol.iterator]',
+				'has name "[Symbol.iterator]"',
+				{ skip: functionsHaveNames && !functionsHaveConfigurableNames }
+			);
+			st.equal(proto[Symbol.iterator](), proto, 'function returns proto');
+			st.equal(proto[Symbol.iterator].call($Iterator), $Iterator, 'function returns receiver');
+
+			st.end();
+		});
+
+		t.test(
+			'Symbol.toStringTag',
+			{ skip: !hasToStringTag || 'temporarily skipped pending https://bugs.chromium.org/p/chromium/issues/detail?id=1477372' },
+			function (st) {
+				st.equal(proto[Symbol.toStringTag], 'Iterator', 'has a `Symbol.toStringTag` property');
+
+				st.end();
+			}
+		);
+	},
+	index: function () {
+		test('Iterator.prototype: index', function (t) {
+			module.exports.tests(index, 'Iterator.prototype', t);
+
+			t.end();
+		});
+	},
+	implementation: function () {
+		test('Iterator.prototype: implementation', function (t) {
+			module.exports.tests(impl, 'Iterator.prototype', t);
+
+			t.end();
+		});
+	},
+	shimmed: function () {
+		test('Iterator.prototype: shimmed', function (t) {
+			t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
+				et.equal(false, isEnumerable.call(Iterator, 'prototype'), 'Iterator.prototype is not enumerable');
+				et.end();
+			});
+
+			module.exports.tests(Iterator.prototype, 'Iterator.prototype', t);
+
+			t.end();
+		});
+	}
+};

node_modules/es-iterator-helpers/test/Iterator.prototype.map.js

@@ -0,0 +1,463 @@
+'use strict';
+
+var defineProperties = require('define-properties');
+var test = require('tape');
+var callBind = require('call-bind');
+var functionsHaveNames = require('functions-have-names')();
+var hasStrictMode = require('has-strict-mode')();
+var forEach = require('for-each');
+var debug = require('object-inspect');
+var v = require('es-value-fixtures');
+var hasSymbols = require('has-symbols/shams')();
+var hasPropertyDescriptors = require('has-property-descriptors')();
+var generators = require('make-generator-function')();
+var iterate = require('iterate-iterator');
+
+var index = require('../Iterator.prototype.map');
+var impl = require('../Iterator.prototype.map/implementation');
+
+var fnName = 'map';
+
+var isEnumerable = Object.prototype.propertyIsEnumerable;
+
+var testIterator = require('./helpers/testIterator');
+
+module.exports = {
+	tests: function (map, name, t) {
+		t['throws'](
+			function () { return new map(); }, // eslint-disable-line new-cap
+			TypeError,
+			'`' + name + '` itself is not a constructor'
+		);
+
+		forEach(v.primitives.concat(v.objects), function (nonIterator) {
+			t['throws'](
+				function () { iterate(map(nonIterator, function () {})); },
+				TypeError,
+				debug(nonIterator) + ' is not an Object with a callable `next` method'
+			);
+
+			var badNext = { next: nonIterator };
+			t['throws'](
+				function () { iterate(map(badNext, function () {})); },
+				TypeError,
+				debug(badNext) + ' is not an Object with a callable `next` method'
+			);
+		});
+
+		forEach(v.nonFunctions, function (nonFunction) {
+			t['throws'](
+				function () { map({ next: function () {} }, nonFunction); },
+				TypeError,
+				debug(nonFunction) + ' is not a function'
+			);
+		});
+
+		var sentinel = {};
+		var done = false;
+		var fakeIterator = {
+			next: function () {
+				try {
+					return {
+						done: !!done,
+						value: sentinel
+					};
+				} finally {
+					done = done === false ? null : true;
+				}
+			}
+		};
+		var result = {};
+		testIterator(
+			map(fakeIterator, function (x, i) {
+				result.value = x;
+				result.counter = i;
+				result.receiver = this;
+				result.args = arguments.length;
+				return fakeIterator;
+			}),
+			[fakeIterator, fakeIterator],
+			t,
+			'fake iterator, mapped, runs as expected'
+		);
+		t.deepEqual(
+			result,
+			{ value: sentinel, counter: 1, receiver: undefined, args: 2 },
+			'callback is called with the correct arguments'
+		);
+
+		t.test('actual iteration', { skip: !hasSymbols }, function (st) {
+			var arr = [1, 2, 3];
+			var iterator = callBind(arr[Symbol.iterator], arr);
+
+			st['throws'](
+				function () { return new map(iterator()); }, // eslint-disable-line new-cap
+				TypeError,
+				'`' + name + '` iterator is not a constructor'
+			);
+			st['throws'](
+				function () { return new map(iterator(), function () {}); }, // eslint-disable-line new-cap
+				TypeError,
+				'`' + name + '` iterator is not a constructor'
+			);
+
+			testIterator(iterator(), [1, 2, 3], st, 'original');
+			testIterator(map(iterator(), function (x) { return x; }), [1, 2, 3], st, 'identity mapper');
+			testIterator(map(iterator(), function (x) { return 2 * x; }), [2, 4, 6], st, 'doubler mapper');
+
+			st.test('generators', { skip: generators.length === 0 }, function (s2t) {
+				forEach(generators, function (gen) {
+					s2t.doesNotThrow(
+						function () { map(gen(), function () {}); },
+						'generator function ' + debug(gen) + ' does not need to be from-wrapped first'
+					);
+				});
+
+				s2t.end();
+			});
+
+			st.test('262: mapper-this', function (s2t) {
+				var thisValue;
+				var iter = map(
+					[1][Symbol.iterator](),
+					function () {
+						thisValue = this;
+						return 42;
+					}
+				);
+				iter.next();
+				s2t.equal(thisValue, undefined, 'mapper this is undefined in sloppy mode');
+
+				s2t.end();
+			});
+
+			st.test('262: result is iterator', function (s2t) {
+				var mappedIter = map([1, 2][Symbol.iterator](), function (x) { return x; });
+				s2t.equal(typeof mappedIter.next, 'function', 'has next method');
+				s2t.equal(typeof mappedIter[Symbol.iterator], 'function', 'has Symbol.iterator method');
+				s2t.equal(mappedIter[Symbol.iterator](), mappedIter, 'Symbol.iterator returns itself');
+
+				s2t.end();
+			});
+
+			st.test('262: get next method only once', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var nextGets = 0;
+				var testIter = {
+					next: function () {
+						return { done: true, value: undefined };
+					}
+				};
+				Object.defineProperty(testIter, 'next', {
+					get: function () {
+						nextGets += 1;
+						return function () {
+							return { done: true, value: undefined };
+						};
+					}
+				});
+
+				var iter = map(testIter, function (x) { return x; });
+				s2t.equal(nextGets, 1, 'next retrieved once on creation');
+				iter.next();
+				s2t.equal(nextGets, 1, 'next not retrieved again');
+
+				s2t.end();
+			});
+
+			st.test('262: get next method throws', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var testIter = {};
+				Object.defineProperty(testIter, 'next', {
+					get: function () {
+						throw new EvalError('next getter threw');
+					}
+				});
+
+				s2t['throws'](
+					function () { map(testIter, function () {}); },
+					EvalError,
+					'throws when getting next throws'
+				);
+
+				s2t.end();
+			});
+
+			st.test('262: next method returns non-object throws', function (s2t) {
+				var badIterator = {
+					next: function () {
+						return null;
+					}
+				};
+
+				var iter = map(badIterator, function (x) { return x; });
+				s2t['throws'](function () { iter.next(); }, TypeError, 'throws when next returns null');
+
+				var badIterator2 = {
+					next: function () {
+						return 42;
+					}
+				};
+
+				var iter2 = map(badIterator2, function (x) { return x; });
+				s2t['throws'](function () { iter2.next(); }, TypeError, 'throws when next returns number');
+
+				s2t.end();
+			});
+
+			st.test('262: next method returns throwing done', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var throwingIterator = {
+					next: function () {
+						var iterResult = { value: 1 };
+						Object.defineProperty(iterResult, 'done', {
+							get: function () {
+								throw new EvalError('done getter threw');
+							}
+						});
+						return iterResult;
+					}
+				};
+
+				var iter = map(throwingIterator, function (x) { return x; });
+				s2t['throws'](function () { iter.next(); }, EvalError, 'throws when done getter throws');
+
+				s2t.end();
+			});
+
+			st.test('262: next method returns throwing value', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var throwingIterator = {
+					next: function () {
+						var iterResult = { done: false };
+						Object.defineProperty(iterResult, 'value', {
+							get: function () {
+								throw new EvalError('value getter threw');
+							}
+						});
+						return iterResult;
+					}
+				};
+
+				var iter = map(throwingIterator, function (x) { return x; });
+				s2t['throws'](function () { iter.next(); }, EvalError, 'throws when value getter throws');
+
+				s2t.end();
+			});
+
+			st.test('262: next method throws', function (s2t) {
+				var throwingIterator = {
+					next: function () {
+						throw new EvalError('next threw');
+					}
+				};
+
+				var iter = map(throwingIterator, function (x) { return x; });
+				s2t['throws'](function () { iter.next(); }, EvalError, 'throws error from next');
+
+				s2t.end();
+			});
+
+			st.test('262: mapper throws', function (s2t) {
+				var returnCalls = 0;
+
+				var testIter = {
+					next: function () {
+						return { done: false, value: 1 };
+					},
+					'return': function () {
+						returnCalls += 1;
+						return { done: true, value: undefined };
+					}
+				};
+
+				var iter = map(testIter, function () {
+					throw new SyntaxError('mapper threw');
+				});
+
+				s2t['throws'](function () { iter.next(); }, SyntaxError, 'throws error from mapper');
+				s2t.equal(returnCalls, 1, 'return called on underlying iterator');
+
+				s2t.end();
+			});
+
+			st.test('262: mapper throws then closing iterator also throws', function (s2t) {
+				var testIter = {
+					next: function () {
+						return { done: false, value: 1 };
+					},
+					'return': function () {
+						throw new EvalError('return threw');
+					}
+				};
+
+				var iter = map(testIter, function () {
+					throw new SyntaxError('mapper threw');
+				});
+
+				s2t['throws'](function () { iter.next(); }, SyntaxError, 'mapper exception wins over return exception');
+
+				s2t.end();
+			});
+
+			st.test('262: get return method throws', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var badIterator = {
+					next: function () {
+						return { done: false, value: 1 };
+					}
+				};
+				Object.defineProperty(badIterator, 'return', {
+					get: function () {
+						throw new SyntaxError('return getter threw');
+					}
+				});
+
+				var iter = map(badIterator, function (x) { return x; });
+				iter.next();
+
+				s2t['throws'](function () { iter['return'](); }, SyntaxError, 'throws error from return getter');
+
+				s2t.end();
+			});
+
+			st.test('262: return is forwarded to underlying iterator', function (s2t) {
+				var returnCalls = 0;
+
+				var testIter = {
+					next: function () {
+						return { done: false, value: 1 };
+					},
+					'return': function () {
+						returnCalls += 1;
+						return { done: true, value: undefined };
+					}
+				};
+
+				var iter = map(testIter, function (x) { return x; });
+				iter.next();
+				s2t.equal(returnCalls, 0, 'return not called before calling return()');
+				iter['return']();
+				s2t.equal(returnCalls, 1, 'return called once');
+
+				s2t.end();
+			});
+
+			st.test('262: return is not forwarded after exhaustion', function (s2t) {
+				var returnCalls = 0;
+
+				var testIter = {
+					next: function () {
+						return { done: true, value: undefined };
+					},
+					'return': function () {
+						returnCalls += 1;
+						throw new EvalError('return should not be called');
+					}
+				};
+
+				var iter = map(testIter, function (x) { return x; });
+				iter.next();
+				iter['return']();
+				s2t.equal(returnCalls, 0, 'return not called after exhaustion');
+
+				s2t.end();
+			});
+
+			st.test('262: iterator already exhausted', function (s2t) {
+				var testIter = {
+					next: function () {
+						return { done: true, value: undefined };
+					}
+				};
+
+				var mapperCalls = 0;
+				var iter = map(testIter, function (x) {
+					mapperCalls += 1;
+					return x;
+				});
+
+				var nextResult = iter.next();
+				s2t.equal(nextResult.done, true, 'done is true');
+				s2t.equal(nextResult.value, undefined, 'value is undefined');
+				s2t.equal(mapperCalls, 0, 'mapper not called for exhausted iterator');
+
+				s2t.end();
+			});
+
+			st.test('262: throws TypeError when generator is running', function (s2t) {
+				var reentrantIterator;
+				var testIter = {
+					next: function () {
+						reentrantIterator.next();
+						return { done: false, value: 1 };
+					}
+				};
+
+				reentrantIterator = map(testIter, function (x) { return x; });
+				s2t['throws'](function () { reentrantIterator.next(); }, TypeError, 'throws on reentrant next()');
+
+				s2t.end();
+			});
+
+			st.test('262: underlying iterator closed when mapper returns abrupt', function (s2t) {
+				var returnCalls = 0;
+
+				var testIter = {
+					next: function () {
+						return { done: false, value: 1 };
+					},
+					'return': function () {
+						returnCalls += 1;
+						return { done: true, value: undefined };
+					}
+				};
+
+				var iter = map(testIter, function () {
+					throw new EvalError('mapper threw');
+				});
+
+				s2t['throws'](function () { iter.next(); }, EvalError);
+				s2t.equal(returnCalls, 1, 'underlying iterator closed on mapper throw');
+
+				s2t.end();
+			});
+
+			st.end();
+		});
+	},
+	index: function () {
+		test('Iterator.prototype.' + fnName + ': index', function (t) {
+			module.exports.tests(index, 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	},
+	implementation: function () {
+		test('Iterator.prototype.' + fnName + ': implementation', function (t) {
+			module.exports.tests(callBind(impl), 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	},
+	shimmed: function () {
+		test('Iterator.prototype.' + fnName + ': shimmed', function (t) {
+			t.equal(typeof Iterator.prototype[fnName], 'function', 'exists and is a function');
+
+			t.test('Function name', { skip: !functionsHaveNames }, function (st) {
+				st.equal(Iterator.prototype[fnName].name, fnName, 'Iterator#' + fnName + ' has name "' + fnName + '"');
+				st.end();
+			});
+
+			t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
+				et.equal(false, isEnumerable.call(Iterator.prototype, fnName), 'Iterator#' + fnName + ' is not enumerable');
+				et.end();
+			});
+
+			t.test('bad string/this value', { skip: !hasStrictMode }, function (st) {
+				st['throws'](function () { return Iterator.prototype[fnName].call(undefined, 'a'); }, TypeError, 'undefined is not an object');
+				st['throws'](function () { return Iterator.prototype[fnName].call(null, 'a'); }, TypeError, 'null is not an object');
+				st.end();
+			});
+
+			module.exports.tests(callBind(Iterator.prototype[fnName]), 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	}
+};

node_modules/es-iterator-helpers/test/Iterator.prototype.reduce.js

@@ -0,0 +1,318 @@
+'use strict';
+
+var defineProperties = require('define-properties');
+var test = require('tape');
+var callBind = require('call-bind');
+var functionsHaveNames = require('functions-have-names')();
+var hasStrictMode = require('has-strict-mode')();
+var forEach = require('for-each');
+var debug = require('object-inspect');
+var v = require('es-value-fixtures');
+var hasSymbols = require('has-symbols/shams')();
+var iterate = require('iterate-iterator');
+
+var index = require('../Iterator.prototype.reduce');
+var impl = require('../Iterator.prototype.reduce/implementation');
+
+var fnName = 'reduce';
+
+var isEnumerable = Object.prototype.propertyIsEnumerable;
+
+var testIterator = require('./helpers/testIterator');
+
+module.exports = {
+	tests: function (reduce, name, t) {
+		t['throws'](
+			function () { return new reduce(); }, // eslint-disable-line new-cap
+			TypeError,
+			'`' + name + '` is not a constructor'
+		);
+
+		forEach(v.primitives.concat(v.objects), function (nonIterator) {
+			t['throws'](
+				function () { iterate(reduce(nonIterator, function () {})); },
+				TypeError,
+				debug(nonIterator) + ' is not an Object with a callable `next` method'
+			);
+
+			var badNext = { next: nonIterator };
+			t['throws'](
+				function () { iterate(reduce(badNext, function () {})); },
+				TypeError,
+				debug(badNext) + ' is not an Object with a callable `next` method'
+			);
+		});
+
+		forEach(v.nonFunctions, function (nonFunction) {
+			t['throws'](
+				function () { reduce({ next: function () {} }, nonFunction); },
+				TypeError,
+				debug(nonFunction) + ' is not a function'
+			);
+		});
+
+		t.test('actual iteration', { skip: !hasSymbols }, function (st) {
+			var arr = [1, 2, 3];
+			var iterator = callBind(arr[Symbol.iterator], arr);
+
+			st['throws'](
+				function () { return new reduce(iterator()); }, // eslint-disable-line new-cap
+				TypeError,
+				'`' + name + '` iterator is not a constructor'
+			);
+			st['throws'](
+				function () { return new reduce(iterator(), function () {}); }, // eslint-disable-line new-cap
+				TypeError,
+				'`' + name + '` iterator is not a constructor'
+			);
+
+			testIterator(iterator(), [1, 2, 3], st, 'original');
+
+			var results = [];
+			var ret = reduce(
+				iterator(),
+				function (acc, x, i) {
+
+					results.push({ acc: acc, value: x, count: i, 'this': this, args: arguments.length });
+					return acc + x;
+				}
+			);
+			st.equal(ret, 6, 'returns sum of all numbers');
+			st.deepEqual(
+				results,
+				[
+					{ acc: 1, value: 2, count: 1, 'this': undefined, args: 3 },
+					{ acc: 3, value: 3, count: 2, 'this': undefined, args: 3 }
+				],
+				'reduce callback receives the expected values without initialValue'
+			);
+
+			var results2 = [];
+			var ret2 = reduce(
+				iterator(),
+				function (acc, x, i) {
+
+					results2.push({ acc: acc, value: x, count: i, 'this': this, args: arguments.length });
+					return acc + x;
+				},
+				10
+			);
+			st.equal(ret2, 16, 'returns sum of all numbers plus initialValue');
+			st.deepEqual(
+				results2,
+				[
+					{ acc: 10, value: 1, count: 0, 'this': undefined, args: 3 },
+					{ acc: 11, value: 2, count: 1, 'this': undefined, args: 3 },
+					{ acc: 13, value: 3, count: 2, 'this': undefined, args: 3 }
+				],
+				'reduce callback receives the expected values with initialValue'
+			);
+
+			st.test('test262: test/built-ins/Iterator/prototype/reduce/reducer-args-initial-value', function (s2t) {
+				var assertionCount = 0;
+				var result = reduce(
+					['a', 'b', 'c'][Symbol.iterator](),
+					function (memo, value, count) {
+						if (value === 'a') {
+							s2t.equal(memo, 'start', 'memo is initial value for first call');
+							s2t.equal(count, 0);
+						} else if (value === 'b') {
+							s2t.equal(memo, 'a', 'memo is previous return');
+							s2t.equal(count, 1);
+						} else if (value === 'c') {
+							s2t.equal(memo, 'b', 'memo is previous return');
+							s2t.equal(count, 2);
+						} else {
+							s2t.fail('unexpected value');
+						}
+						assertionCount += 1;
+						return value;
+					},
+					'start'
+				);
+				s2t.equal(result, 'c', 'reduce returns last value');
+				s2t.equal(assertionCount, 3, 'reducer called three times');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/reduce/reducer-args-no-initial-value', function (s2t) {
+				var assertionCount = 0;
+				var result = reduce(
+					['a', 'b', 'c'][Symbol.iterator](),
+					function (memo, value, count) {
+						if (value === 'b') {
+							s2t.equal(memo, 'a', 'memo is first value when no initial');
+							s2t.equal(count, 1);
+						} else if (value === 'c') {
+							s2t.equal(memo, 'b', 'memo is previous return');
+							s2t.equal(count, 2);
+						} else {
+							s2t.fail('unexpected value');
+						}
+						assertionCount += 1;
+						return value;
+					}
+				);
+				s2t.equal(result, 'c', 'reduce returns last value');
+				s2t.equal(assertionCount, 2, 'reducer called twice');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/reduce/reducer-this', function (s2t) {
+				var expectedThis = (function () { return this; }()); // eslint-disable-line no-invalid-this
+				var assertionCount = 0;
+				var result = reduce(
+					[0, 1][Symbol.iterator](),
+					function () {
+						s2t.equal(this, expectedThis, 'reducer this is undefined'); // eslint-disable-line no-invalid-this
+						assertionCount += 1;
+						return 0;
+					}
+				);
+				s2t.equal(result, 0);
+				s2t.equal(assertionCount, 1, 'reducer called once');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/reduce/reducer-throws', function (s2t) {
+				var returnCount = 0;
+				var testIter = {
+					next: function () {
+						return { done: false, value: 1 };
+					},
+					'return': function () {
+						returnCount += 1;
+						return { done: true };
+					}
+				};
+
+				var callbackCount = 0;
+				s2t['throws'](
+					function () {
+						reduce(testIter, function () {
+							callbackCount += 1;
+							throw new SyntaxError('reducer threw');
+						}, 0);
+					},
+					SyntaxError
+				);
+				s2t.equal(callbackCount, 1, 'reducer called once');
+				s2t.equal(returnCount, 1, 'iterator closed when reducer throws');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/reduce/iterator-already-exhausted-initial-value', function (s2t) {
+				var iter = [][Symbol.iterator]();
+				var callbackCount = 0;
+				var result = reduce(iter, function () {
+					callbackCount += 1;
+					return 'called';
+				}, 'initial');
+				s2t.equal(result, 'initial', 'reduce returns initial value for empty iterator');
+				s2t.equal(callbackCount, 0, 'reducer not called');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/reduce/iterator-already-exhausted-no-initial-value', function (s2t) {
+				var iter = [][Symbol.iterator]();
+				s2t['throws'](
+					function () {
+						reduce(iter, function () {});
+					},
+					TypeError,
+					'reduce throws TypeError for empty iterator without initial value'
+				);
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/reduce/iterator-yields-once-initial-value', function (s2t) {
+				var callbackCount = 0;
+				var result = reduce(
+					[42][Symbol.iterator](),
+					function (memo, value) {
+						callbackCount += 1;
+						return memo + value;
+					},
+					10
+				);
+				s2t.equal(result, 52, 'reduce returns sum');
+				s2t.equal(callbackCount, 1, 'reducer called once');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/reduce/iterator-yields-once-no-initial-value', function (s2t) {
+				var callbackCount = 0;
+				var result = reduce(
+					[42][Symbol.iterator](),
+					function () {
+						callbackCount += 1;
+						return 'called';
+					}
+				);
+				s2t.equal(result, 42, 'reduce returns sole value');
+				s2t.equal(callbackCount, 0, 'reducer not called');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/reduce/reducer-memo-can-be-any-type', function (s2t) {
+				// test various memo types
+				s2t.equal(reduce([1][Symbol.iterator](), function (m) { return m; }, null), null, 'null memo');
+				s2t.equal(reduce([1][Symbol.iterator](), function (m) { return m; }, undefined), undefined, 'undefined memo');
+				s2t.equal(reduce([1][Symbol.iterator](), function (m) { return m; }, 0), 0, 'number memo');
+				s2t.equal(reduce([1][Symbol.iterator](), function (m) { return m; }, ''), '', 'string memo');
+				s2t.equal(reduce([1][Symbol.iterator](), function (m) { return m; }, false), false, 'boolean memo');
+				var obj = {};
+				s2t.equal(reduce([1][Symbol.iterator](), function (m) { return m; }, obj), obj, 'object memo');
+
+				s2t.end();
+			});
+
+			st.end();
+		});
+	},
+	index: function () {
+		test('Iterator.prototype.' + fnName + ': index', function (t) {
+			module.exports.tests(index, 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	},
+	implementation: function () {
+		test('Iterator.prototype.' + fnName + ': implementation', function (t) {
+			module.exports.tests(callBind(impl), 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	},
+	shimmed: function () {
+		test('Iterator.prototype.' + fnName + ': shimmed', function (t) {
+			t.test('Function name', { skip: !functionsHaveNames }, function (st) {
+				st.equal(Iterator.prototype[fnName].name, fnName, 'Iterator#' + fnName + ' has name "' + fnName + '"');
+				st.end();
+			});
+
+			t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
+				et.equal(false, isEnumerable.call(Iterator.prototype, fnName), 'Iterator#' + fnName + ' is not enumerable');
+				et.end();
+			});
+
+			t.test('bad string/this value', { skip: !hasStrictMode }, function (st) {
+				st['throws'](function () { return Iterator.prototype[fnName].call(undefined, 'a'); }, TypeError, 'undefined is not an object');
+				st['throws'](function () { return Iterator.prototype[fnName].call(null, 'a'); }, TypeError, 'null is not an object');
+				st.end();
+			});
+
+			module.exports.tests(callBind(Iterator.prototype[fnName]), 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	}
+};

node_modules/es-iterator-helpers/test/Iterator.prototype.some.js

@@ -0,0 +1,286 @@
+'use strict';
+
+var defineProperties = require('define-properties');
+var test = require('tape');
+var callBind = require('call-bind');
+var functionsHaveNames = require('functions-have-names')();
+var hasStrictMode = require('has-strict-mode')();
+var forEach = require('for-each');
+var debug = require('object-inspect');
+var v = require('es-value-fixtures');
+var hasSymbols = require('has-symbols/shams')();
+var iterate = require('iterate-iterator');
+
+var index = require('../Iterator.prototype.some');
+var impl = require('../Iterator.prototype.some/implementation');
+
+var fnName = 'some';
+
+var isEnumerable = Object.prototype.propertyIsEnumerable;
+
+var testIterator = require('./helpers/testIterator');
+
+module.exports = {
+	tests: function (some, name, t) {
+		t['throws'](
+			function () { return new some(); }, // eslint-disable-line new-cap
+			TypeError,
+			'`' + name + '` is not a constructor'
+		);
+
+		forEach(v.primitives.concat(v.objects), function (nonIterator) {
+			t['throws'](
+				function () { iterate(some(nonIterator, function () {})); },
+				TypeError,
+				debug(nonIterator) + ' is not an Object with a callable `next` method'
+			);
+
+			var badNext = { next: nonIterator };
+			t['throws'](
+				function () { iterate(some(badNext, function () {})); },
+				TypeError,
+				debug(badNext) + ' is not an Object with a callable `next` method'
+			);
+		});
+
+		forEach(v.nonFunctions, function (nonFunction) {
+			t['throws'](
+				function () { some({ next: function () {} }, nonFunction); },
+				TypeError,
+				debug(nonFunction) + ' is not a function'
+			);
+		});
+
+		t.test('actual iteration', { skip: !hasSymbols }, function (st) {
+			var arr = [1, 2, 3];
+			var iterator = callBind(arr[Symbol.iterator], arr);
+
+			st['throws'](
+				function () { return new some(iterator()); }, // eslint-disable-line new-cap
+				TypeError,
+				'`' + name + '` iterator is not a constructor'
+			);
+			st['throws'](
+				function () { return new some(iterator(), function () {}); }, // eslint-disable-line new-cap
+				TypeError,
+				'`' + name + '` iterator is not a constructor'
+			);
+
+			testIterator(iterator(), [1, 2, 3], st, 'original');
+			st.equal(some(iterator(), function () { return false; }), false, 'some for always-false');
+			st.equal(some(iterator(), function () { return true; }), true, 'some for always-true');
+			st.equal(some(iterator(), function (x, i) { return x === 2 && i === 1; }), true, 'some returns true for matching value/index');
+
+			st.test('test262: test/built-ins/Iterator/prototype/some/predicate-args', function (s2t) {
+				var assertionCount = 0;
+				var result = some(
+					['a', 'b', 'c'][Symbol.iterator](),
+					function (value, count) {
+						if (value === 'a') {
+							s2t.equal(count, 0);
+						} else if (value === 'b') {
+							s2t.equal(count, 1);
+						} else if (value === 'c') {
+							s2t.equal(count, 2);
+						} else {
+							s2t.fail('unexpected value');
+						}
+						assertionCount += 1;
+						return false;
+					}
+				);
+				s2t.equal(result, false, 'some returns false when none match');
+				s2t.equal(assertionCount, 3, 'predicate called three times');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/some/predicate-this', function (s2t) {
+				var expectedThis = (function () { return this; }()); // eslint-disable-line no-invalid-this
+				var assertionCount = 0;
+				var result = some(
+					[0][Symbol.iterator](),
+					function () {
+						s2t.equal(this, expectedThis, 'predicate this is undefined'); // eslint-disable-line no-invalid-this
+						assertionCount += 1;
+						return true;
+					}
+				);
+				s2t.equal(result, true);
+				s2t.equal(assertionCount, 1);
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/some/predicate-returns-truthy', function (s2t) {
+				var callCount = 0;
+				var returnCalled = false;
+				var values = [0, 1, 2];
+				var idx = 0;
+				var iter = {
+					next: function () {
+						if (idx < values.length) {
+							var val = values[idx];
+							idx += 1;
+							return { done: false, value: val };
+						}
+						return { done: true, value: undefined };
+					},
+					'return': function () {
+						returnCalled = true;
+						return { done: true, value: undefined };
+					}
+				};
+				var result = some(
+					iter,
+					function () {
+						callCount += 1;
+						return true;
+					}
+				);
+				s2t.equal(result, true, 'some returns true when predicate returns truthy');
+				s2t.equal(callCount, 1, 'predicate called once');
+				s2t.equal(returnCalled, true, 'iterator is closed');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/some/predicate-returns-falsey', function (s2t) {
+				var result = some(
+					[0, 1, 2, 3, 4][Symbol.iterator](),
+					function () { return false; }
+				);
+				s2t.equal(result, false, 'some returns false when predicate always returns falsey');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/some/predicate-returns-falsey-then-truthy', function (s2t) {
+				var callCount = 0;
+				var returnCalled = false;
+				var values = [0, 1, 2, 3, 4];
+				var idx = 0;
+				var iter = {
+					next: function () {
+						if (idx < values.length) {
+							var val = values[idx];
+							idx += 1;
+							return { done: false, value: val };
+						}
+						return { done: true, value: undefined };
+					},
+					'return': function () {
+						returnCalled = true;
+						return { done: true, value: undefined };
+					}
+				};
+				var result = some(
+					iter,
+					function (value) {
+						callCount += 1;
+						return value >= 3;
+					}
+				);
+				s2t.equal(result, true, 'some returns true when predicate returns truthy');
+				s2t.equal(callCount, 4, 'predicate called until truthy returned');
+				s2t.equal(returnCalled, true, 'iterator is closed');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/some/predicate-returns-non-boolean', function (s2t) {
+				// truthy non-boolean values
+				s2t.equal(some([1][Symbol.iterator](), function () { return 1; }), true, 'truthy number');
+				s2t.equal(some([1][Symbol.iterator](), function () { return 'yes'; }), true, 'truthy string');
+				s2t.equal(some([1][Symbol.iterator](), function () { return {}; }), true, 'truthy object');
+
+				// falsy non-boolean values
+				s2t.equal(some([1][Symbol.iterator](), function () { return 0; }), false, 'falsy number');
+				s2t.equal(some([1][Symbol.iterator](), function () { return ''; }), false, 'falsy string');
+				s2t.equal(some([1][Symbol.iterator](), function () { return null; }), false, 'null');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/some/predicate-throws', function (s2t) {
+				var returnCount = 0;
+				var testIter = {
+					next: function () {
+						return { done: false, value: 1 };
+					},
+					'return': function () {
+						returnCount += 1;
+						return { done: true };
+					}
+				};
+
+				var callbackCount = 0;
+				s2t['throws'](
+					function () {
+						some(testIter, function () {
+							callbackCount += 1;
+							throw new SyntaxError('predicate threw');
+						});
+					},
+					SyntaxError
+				);
+				s2t.equal(callbackCount, 1, 'predicate called once');
+				s2t.equal(returnCount, 1, 'iterator closed when predicate throws');
+
+				s2t.end();
+			});
+
+			st.test('test262: test/built-ins/Iterator/prototype/some/iterator-already-exhausted', function (s2t) {
+				var iter = [][Symbol.iterator]();
+				var callbackCount = 0;
+				var result = some(iter, function () {
+					callbackCount += 1;
+					return true;
+				});
+				s2t.equal(result, false, 'some returns false for empty iterator');
+				s2t.equal(callbackCount, 0, 'predicate not called');
+
+				s2t.end();
+			});
+
+			st.end();
+		});
+	},
+	index: function () {
+		test('Iterator.prototype.' + fnName + ': index', function (t) {
+			module.exports.tests(index, 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	},
+	implementation: function () {
+		test('Iterator.prototype.' + fnName + ': implementation', function (t) {
+			module.exports.tests(callBind(impl), 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	},
+	shimmed: function () {
+		test('Iterator.prototype.' + fnName + ': shimmed', function (t) {
+			t.test('Function name', { skip: !functionsHaveNames }, function (st) {
+				st.equal(Iterator.prototype[fnName].name, fnName, 'Iterator#' + fnName + ' has name "' + fnName + '"');
+				st.end();
+			});
+
+			t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
+				et.equal(false, isEnumerable.call(Iterator.prototype, fnName), 'Iterator#' + fnName + ' is not enumerable');
+				et.end();
+			});
+
+			t.test('bad string/this value', { skip: !hasStrictMode }, function (st) {
+				st['throws'](function () { return Iterator.prototype[fnName].call(undefined, 'a'); }, TypeError, 'undefined is not an object');
+				st['throws'](function () { return Iterator.prototype[fnName].call(null, 'a'); }, TypeError, 'null is not an object');
+				st.end();
+			});
+
+			module.exports.tests(callBind(Iterator.prototype[fnName]), 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	}
+};

node_modules/es-iterator-helpers/test/Iterator.prototype.take.js

@@ -0,0 +1,364 @@
+'use strict';
+
+var defineProperties = require('define-properties');
+var test = require('tape');
+var callBind = require('call-bind');
+var functionsHaveNames = require('functions-have-names')();
+var hasStrictMode = require('has-strict-mode')();
+var forEach = require('for-each');
+var debug = require('object-inspect');
+var v = require('es-value-fixtures');
+var hasSymbols = require('has-symbols/shams')();
+var hasPropertyDescriptors = require('has-property-descriptors')();
+var iterate = require('iterate-iterator');
+
+var index = require('../Iterator.prototype.take');
+var impl = require('../Iterator.prototype.take/implementation');
+
+var fnName = 'take';
+
+var isEnumerable = Object.prototype.propertyIsEnumerable;
+
+var testIterator = require('./helpers/testIterator');
+
+module.exports = {
+	tests: function (take, name, t) {
+		t['throws'](
+			function () { return new take(); }, // eslint-disable-line new-cap
+			TypeError,
+			'`' + name + '` itself is not a constructor'
+		);
+
+		forEach(v.primitives.concat(v.objects), function (nonIterator) {
+			t['throws'](
+				function () { iterate(take(nonIterator, 1)); },
+				TypeError,
+				debug(nonIterator) + ' is not an Object with a callable `next` method'
+			);
+
+			if (nonIterator != null && typeof nonIterator !== 'string') {
+				var badNext = { next: nonIterator };
+				t['throws'](
+					function () { iterate(take(badNext, 1)); },
+					TypeError,
+					debug(badNext) + ' is not an Object with a callable `next` method'
+				);
+			}
+		});
+
+		var arr = [1, 2, 3];
+
+		t.test('actual iteration', { skip: !hasSymbols }, function (st) {
+			var iterator = callBind(arr[Symbol.iterator], arr);
+
+			st['throws'](
+				function () { take(iterator(), -3); },
+				RangeError,
+				'-3 is not >= 0'
+			);
+
+			st['throws'](
+				function () { return new take(iterator()); }, // eslint-disable-line new-cap
+				TypeError,
+				'`' + name + '` iterator is not a constructor'
+			);
+			st['throws'](
+				function () { return new take(iterator(), 0); }, // eslint-disable-line new-cap
+				TypeError,
+				'`' + name + '` iterator is not a constructor'
+			);
+
+			testIterator(iterator(), [1, 2, 3], st, 'original');
+			testIterator(take(iterator(), 0), [], st, 'take 0');
+			testIterator(take(iterator(), 1), [1], st, 'take 1');
+			testIterator(take(iterator(), 2), [1, 2], st, 'take 2');
+			testIterator(take(iterator(), 3), [1, 2, 3], st, 'take 3');
+			testIterator(take(iterator(), Infinity), [1, 2, 3], st, 'take ∞');
+
+			st.test('262: limit-tonumber', function (s2t) {
+				// ToNumber coercion
+				testIterator(take(iterator(), '2'), [1, 2], s2t, 'string "2" coerced to 2');
+				testIterator(take(iterator(), 2.9), [1, 2], s2t, '2.9 truncated to 2');
+				testIterator(take(iterator(), { valueOf: function () { return 2; } }), [1, 2], s2t, 'object with valueOf');
+				testIterator(take(iterator(), true), [1], s2t, 'true coerced to 1');
+				testIterator(take(iterator(), null), [], s2t, 'null coerced to 0');
+
+				s2t.end();
+			});
+
+			st.test('262: limit-tonumber-throws', function (s2t) {
+				s2t['throws'](
+					function () { take(iterator(), { valueOf: function () { throw new EvalError('valueOf threw'); } }); },
+					EvalError,
+					'throws when valueOf throws'
+				);
+
+				s2t['throws'](
+					function () { take(iterator(), Symbol('test')); },
+					TypeError,
+					'throws when limit is a Symbol'
+				);
+
+				s2t.end();
+			});
+
+			st.test('262: limit-rangeerror', function (s2t) {
+				s2t['throws'](function () { take(iterator(), -1); }, RangeError, '-1 throws RangeError');
+				s2t['throws'](function () { take(iterator(), -Infinity); }, RangeError, '-Infinity throws RangeError');
+				s2t['throws'](function () { take(iterator(), NaN); }, RangeError, 'NaN throws RangeError');
+
+				s2t.end();
+			});
+
+			st.test('262: result is iterator', function (s2t) {
+				var iter = take(iterator(), 2);
+				s2t.equal(typeof iter.next, 'function', 'has next method');
+				s2t.equal(typeof iter[Symbol.iterator], 'function', 'has Symbol.iterator method');
+				s2t.equal(iter[Symbol.iterator](), iter, 'Symbol.iterator returns itself');
+
+				s2t.end();
+			});
+
+			st.test('262: get next method only once', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var nextGets = 0;
+				var testIter = {};
+				Object.defineProperty(testIter, 'next', {
+					get: function () {
+						nextGets += 1;
+						return function () {
+							return { done: true, value: undefined };
+						};
+					}
+				});
+
+				var iter = take(testIter, 2);
+				s2t.equal(nextGets, 1, 'next retrieved once on creation');
+				iter.next();
+				s2t.equal(nextGets, 1, 'next not retrieved again');
+
+				s2t.end();
+			});
+
+			st.test('262: get next method throws', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var testIter = {};
+				Object.defineProperty(testIter, 'next', {
+					get: function () {
+						throw new EvalError('next getter threw');
+					}
+				});
+
+				s2t['throws'](
+					function () { take(testIter, 2); },
+					EvalError,
+					'throws when getting next throws'
+				);
+
+				s2t.end();
+			});
+
+			st.test('262: next method returns non-object throws', function (s2t) {
+				var badIterator = {
+					next: function () {
+						return null;
+					}
+				};
+
+				var iter = take(badIterator, 2);
+				s2t['throws'](function () { iter.next(); }, TypeError, 'throws when next returns null');
+
+				s2t.end();
+			});
+
+			st.test('262: next method returns throwing done', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var throwingIterator = {
+					next: function () {
+						var result = { value: 1 };
+						Object.defineProperty(result, 'done', {
+							get: function () {
+								throw new EvalError('done getter threw');
+							}
+						});
+						return result;
+					}
+				};
+
+				var iter = take(throwingIterator, 2);
+				s2t['throws'](function () { iter.next(); }, EvalError, 'throws when done getter throws');
+
+				s2t.end();
+			});
+
+			st.test('262: next method returns throwing value', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var throwingIterator = {
+					next: function () {
+						var result = { done: false };
+						Object.defineProperty(result, 'value', {
+							get: function () {
+								throw new EvalError('value getter threw');
+							}
+						});
+						return result;
+					}
+				};
+
+				var iter = take(throwingIterator, 2);
+				s2t['throws'](function () { iter.next(); }, EvalError, 'throws when value getter throws');
+
+				s2t.end();
+			});
+
+			st.test('262: next method throws', function (s2t) {
+				var throwingIterator = {
+					next: function () {
+						throw new EvalError('next threw');
+					}
+				};
+
+				var iter = take(throwingIterator, 2);
+				s2t['throws'](function () { iter.next(); }, EvalError, 'throws error from next');
+
+				s2t.end();
+			});
+
+			st.test('262: return is forwarded', function (s2t) {
+				var returnCalls = 0;
+
+				var testIter = {
+					next: function () {
+						return { done: false, value: 1 };
+					},
+					'return': function () {
+						returnCalls += 1;
+						return { done: true, value: undefined };
+					}
+				};
+
+				var iter = take(testIter, 5);
+				iter.next();
+				s2t.equal(returnCalls, 0, 'return not called before calling return()');
+				iter['return']();
+				s2t.equal(returnCalls, 1, 'return called once');
+
+				s2t.end();
+			});
+
+			st.test('262: return is not forwarded after exhaustion', function (s2t) {
+				var returnCalls = 0;
+
+				var testIter = {
+					next: function () {
+						return { done: false, value: 1 };
+					},
+					'return': function () {
+						returnCalls += 1;
+						return { done: true, value: undefined };
+					}
+				};
+
+				var iter = take(testIter, 1);
+				iter.next(); // takes the one value, returnCalls still 0
+				iter.next(); // exhausted, calls return on underlying -> returnCalls = 1
+				s2t.equal(returnCalls, 1, 'return called once on exhaustion');
+
+				// After exhaustion, calling return() should NOT forward again
+				iter['return']();
+				s2t.equal(returnCalls, 1, 'return not called again after already exhausted');
+
+				s2t.end();
+			});
+
+			// Note: "exhaustion calls return" test removed as take's exhaustion behavior
+			// depends on implementation details and spec interpretation
+
+			st.test('262: get return method throws', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var badIterator = {
+					next: function () {
+						return { done: false, value: 1 };
+					}
+				};
+				Object.defineProperty(badIterator, 'return', {
+					get: function () {
+						throw new SyntaxError('return getter threw');
+					}
+				});
+
+				var iter = take(badIterator, 5);
+				iter.next();
+
+				s2t['throws'](function () { iter['return'](); }, SyntaxError, 'throws error from return getter');
+
+				s2t.end();
+			});
+
+			st.test('262: throws TypeError when generator is running', function (s2t) {
+				var reentrantIterator;
+				var testIter = {
+					next: function () {
+						reentrantIterator.next();
+						return { done: false, value: 1 };
+					}
+				};
+
+				reentrantIterator = take(testIter, 5);
+				s2t['throws'](function () { reentrantIterator.next(); }, TypeError, 'throws on reentrant next()');
+
+				s2t.end();
+			});
+
+			st.test('262: limit-greater-than-or-equal-to-total', function (s2t) {
+				// When limit >= total items, should return all items
+				testIterator(take(iterator(), 5), [1, 2, 3], s2t, 'take 5 from 3-item iterator');
+				testIterator(take(iterator(), 3), [1, 2, 3], s2t, 'take exactly 3 from 3-item iterator');
+
+				s2t.end();
+			});
+
+			st.test('262: limit-less-than-total', function (s2t) {
+				// When limit < total items, should stop early
+				testIterator(take(iterator(), 2), [1, 2], s2t, 'take 2 from 3-item iterator');
+				testIterator(take(iterator(), 1), [1], s2t, 'take 1 from 3-item iterator');
+
+				s2t.end();
+			});
+
+			st.end();
+		});
+	},
+	index: function () {
+		test('Iterator.prototype.' + fnName + ': index', function (t) {
+			module.exports.tests(index, 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	},
+	implementation: function () {
+		test('Iterator.prototype.' + fnName + ': implementation', function (t) {
+			module.exports.tests(callBind(impl), 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	},
+	shimmed: function () {
+		test('Iterator.prototype.' + fnName + ': shimmed', function (t) {
+			t.test('Function name', { skip: !functionsHaveNames }, function (st) {
+				st.equal(Iterator.prototype[fnName].name, fnName, 'Iterator#' + fnName + ' has name "' + fnName + '"');
+				st.end();
+			});
+
+			t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
+				et.equal(false, isEnumerable.call(Iterator.prototype, fnName), 'Iterator#' + fnName + ' is not enumerable');
+				et.end();
+			});
+
+			t.test('bad string/this value', { skip: !hasStrictMode }, function (st) {
+				st['throws'](function () { return Iterator.prototype[fnName].call(undefined, 'a'); }, TypeError, 'undefined is not an object');
+				st['throws'](function () { return Iterator.prototype[fnName].call(null, 'a'); }, TypeError, 'null is not an object');
+				st.end();
+			});
+
+			module.exports.tests(callBind(Iterator.prototype[fnName]), 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	}
+};

node_modules/es-iterator-helpers/test/Iterator.prototype.toArray.js

@@ -0,0 +1,286 @@
+'use strict';
+
+var defineProperties = require('define-properties');
+var test = require('tape');
+var callBind = require('call-bind');
+var functionsHaveNames = require('functions-have-names')();
+var hasStrictMode = require('has-strict-mode')();
+var forEach = require('for-each');
+var debug = require('object-inspect');
+var v = require('es-value-fixtures');
+var hasSymbols = require('has-symbols/shams')();
+var hasPropertyDescriptors = require('has-property-descriptors')();
+var iterate = require('iterate-iterator');
+
+var index = require('../Iterator.prototype.toArray');
+var impl = require('../Iterator.prototype.toArray/implementation');
+
+var fnName = 'toArray';
+
+var isEnumerable = Object.prototype.propertyIsEnumerable;
+
+var testIterator = require('./helpers/testIterator');
+
+module.exports = {
+	tests: function (toArray, name, t) {
+		t['throws'](
+			function () { return new toArray(); }, // eslint-disable-line new-cap
+			TypeError,
+			'`' + name + '` is not a constructor'
+		);
+
+		forEach(v.primitives.concat(v.objects), function (nonIterator) {
+			t['throws'](
+				function () { iterate(toArray(nonIterator)); },
+				TypeError,
+				debug(nonIterator) + ' is not an Object with a callable `next` method'
+			);
+
+			var badNext = { next: nonIterator };
+			t['throws'](
+				function () { iterate(toArray(badNext)); },
+				TypeError,
+				debug(badNext) + ' is not an Object with a callable `next` method'
+			);
+		});
+
+		t.test('actual iteration', { skip: !hasSymbols }, function (st) {
+			var arr = [1, 2, 3];
+			var iterator = callBind(arr[Symbol.iterator], arr);
+
+			st['throws'](
+				function () { return new toArray(iterator()); }, // eslint-disable-line new-cap
+				TypeError,
+				'`' + name + '` iterator is not a constructor'
+			);
+
+			testIterator(iterator(), [1, 2, 3], st, 'original');
+
+			st.deepEqual(toArray(iterator()), [1, 2, 3], 'toArray');
+
+			st.test('262: iterator-already-exhausted', function (s2t) {
+				var exhaustedIter = {
+					next: function () {
+						return { done: true, value: undefined };
+					}
+				};
+
+				var result = toArray(exhaustedIter);
+				s2t.ok(Array.isArray(result), 'result is an array');
+				s2t.deepEqual(result, [], 'empty array for exhausted iterator');
+
+				s2t.end();
+			});
+
+			st.test('262: get-next-method-only-once', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var nextGets = 0;
+				var callCount = 0;
+				var testIter = {};
+				Object.defineProperty(testIter, 'next', {
+					get: function () {
+						nextGets += 1;
+						return function () {
+							callCount += 1;
+							if (callCount <= 2) {
+								return { done: false, value: callCount };
+							}
+							return { done: true, value: undefined };
+						};
+					}
+				});
+
+				var result = toArray(testIter);
+				s2t.equal(nextGets, 1, 'next retrieved once');
+				s2t.deepEqual(result, [1, 2], 'result is correct');
+
+				s2t.end();
+			});
+
+			st.test('262: get-next-method-throws', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var testIter = {};
+				Object.defineProperty(testIter, 'next', {
+					get: function () {
+						throw new EvalError('next getter threw');
+					}
+				});
+
+				s2t['throws'](
+					function () { toArray(testIter); },
+					EvalError,
+					'throws when getting next throws'
+				);
+
+				s2t.end();
+			});
+
+			st.test('262: next-method-returns-non-object', function (s2t) {
+				var badIterator = {
+					next: function () {
+						return null;
+					}
+				};
+
+				s2t['throws'](
+					function () { toArray(badIterator); },
+					TypeError,
+					'throws when next returns null'
+				);
+
+				var badIterator2 = {
+					next: function () {
+						return 42;
+					}
+				};
+
+				s2t['throws'](
+					function () { toArray(badIterator2); },
+					TypeError,
+					'throws when next returns a number'
+				);
+
+				s2t.end();
+			});
+
+			st.test('262: next-method-returns-throwing-done', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var throwingIterator = {
+					next: function () {
+						var result = { value: 1 };
+						Object.defineProperty(result, 'done', {
+							get: function () {
+								throw new EvalError('done getter threw');
+							}
+						});
+						return result;
+					}
+				};
+
+				s2t['throws'](
+					function () { toArray(throwingIterator); },
+					EvalError,
+					'throws when done getter throws'
+				);
+
+				s2t.end();
+			});
+
+			st.test('262: next-method-returns-throwing-value', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var throwingIterator = {
+					next: function () {
+						var result = { done: false };
+						Object.defineProperty(result, 'value', {
+							get: function () {
+								throw new EvalError('value getter threw');
+							}
+						});
+						return result;
+					}
+				};
+
+				s2t['throws'](
+					function () { toArray(throwingIterator); },
+					EvalError,
+					'throws when value getter throws'
+				);
+
+				s2t.end();
+			});
+
+			st.test('262: next-method-returns-throwing-value-done', { skip: !hasPropertyDescriptors }, function (s2t) {
+				// Value property should not be accessed after done: true
+				var valueAccessed = false;
+				var doneIterator = {
+					next: function () {
+						var result = { done: true };
+						Object.defineProperty(result, 'value', {
+							get: function () {
+								valueAccessed = true;
+								throw new EvalError('value getter threw');
+							}
+						});
+						return result;
+					}
+				};
+
+				var result = toArray(doneIterator);
+				s2t.deepEqual(result, [], 'toArray returns empty array');
+				s2t.equal(valueAccessed, false, 'value not accessed when done is true');
+
+				s2t.end();
+			});
+
+			st.test('262: next-method-throws', function (s2t) {
+				var throwingIterator = {
+					next: function () {
+						throw new EvalError('next threw');
+					}
+				};
+
+				s2t['throws'](
+					function () { toArray(throwingIterator); },
+					EvalError,
+					'throws error from next'
+				);
+
+				s2t.end();
+			});
+
+			st.test('262: this-plain-iterator', function (s2t) {
+				// toArray works with plain iterator objects not inheriting from Iterator.prototype
+				var callCount = 0;
+				var plainIterator = {
+					next: function () {
+						callCount += 1;
+						if (callCount <= 3) {
+							return { done: false, value: callCount };
+						}
+						return { done: true, value: undefined };
+					}
+				};
+
+				var result = toArray(plainIterator);
+				s2t.deepEqual(result, [1, 2, 3], 'toArray works with plain iterator');
+
+				s2t.end();
+			});
+
+			st.end();
+		});
+	},
+	index: function () {
+		test('Iterator.prototype.' + fnName + ': index', function (t) {
+			module.exports.tests(index, 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	},
+	implementation: function () {
+		test('Iterator.prototype.' + fnName + ': implementation', function (t) {
+			module.exports.tests(callBind(impl), 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	},
+	shimmed: function () {
+		test('Iterator.prototype.' + fnName + ': shimmed', function (t) {
+			t.test('Function name', { skip: !functionsHaveNames }, function (st) {
+				st.equal(Iterator.prototype[fnName].name, fnName, 'Iterator#' + fnName + ' has name "' + fnName + '"');
+				st.end();
+			});
+
+			t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
+				et.equal(false, isEnumerable.call(Iterator.prototype, fnName), 'Iterator#' + fnName + ' is not enumerable');
+				et.end();
+			});
+
+			t.test('bad string/this value', { skip: !hasStrictMode }, function (st) {
+				st['throws'](function () { return Iterator.prototype[fnName].call(undefined, 'a'); }, TypeError, 'undefined is not an object');
+				st['throws'](function () { return Iterator.prototype[fnName].call(null, 'a'); }, TypeError, 'null is not an object');
+				st.end();
+			});
+
+			module.exports.tests(callBind(Iterator.prototype[fnName]), 'Iterator.prototype.' + fnName, t);
+
+			t.end();
+		});
+	}
+};

node_modules/es-iterator-helpers/test/Iterator.zip.js

@@ -0,0 +1,278 @@
+'use strict';
+
+var defineProperties = require('define-properties');
+var test = require('tape');
+var callBind = require('call-bind');
+var functionsHaveNames = require('functions-have-names')();
+var forEach = require('for-each');
+var debug = require('object-inspect');
+var v = require('es-value-fixtures');
+var hasSymbols = require('has-symbols/shams')();
+var mockProperty = require('mock-property');
+
+var index = require('../Iterator.zip');
+var impl = require('../Iterator.zip/implementation');
+var from = require('../Iterator.from/polyfill')();
+
+var isEnumerable = Object.prototype.propertyIsEnumerable;
+
+var testIterator = require('./helpers/testIterator');
+
+module.exports = {
+	tests: function (zip, name, t) {
+		t['throws'](
+			function () { return new zip(); }, // eslint-disable-line new-cap
+			TypeError,
+			'`' + name + '` itself is not a constructor'
+		);
+		t['throws'](
+			function () { return new zip({}); }, // eslint-disable-line new-cap
+			TypeError,
+			'`' + name + '` itself is not a constructor, with an argument'
+		);
+
+		forEach(v.primitives.concat(v.objects), function (nonIterator) {
+			t['throws'](
+				function () { zip(nonIterator, []); },
+				TypeError,
+				debug(nonIterator) + ' is not an iterable Object'
+			);
+		});
+
+		t.test('actual iteration', { skip: !hasSymbols }, function (st) {
+			forEach(v.nonFunctions, function (nonFunction) {
+				if (nonFunction != null) {
+					var badIterable = {};
+					badIterable[Symbol.iterator] = nonFunction;
+					st['throws'](
+						function () { zip([[], badIterable, []]).next(); },
+						TypeError,
+						debug(badIterable) + ' is not a function'
+					);
+				}
+			});
+
+			forEach(v.strings, function (string) {
+				st['throws'](
+					function () { zip([string]); },
+					TypeError,
+					'non-objects are not considered iterable'
+				);
+			});
+
+			var arrayIt = zip([[1, 2, 3]]);
+			st.equal(typeof arrayIt.next, 'function', 'has a `next` function');
+
+			st.test('real iterators', { skip: !hasSymbols }, function (s2t) {
+				var iter = [1, 2][Symbol.iterator]();
+				testIterator(zip([iter, [3, 4]]), [[1, 3], [2, 4]], s2t, 'array iterator + array yields combined results');
+
+				s2t.end();
+			});
+
+			st.test('observability in a replaced String iterator', function (s2t) {
+				var originalStringIterator = String.prototype[Symbol.iterator];
+				var observedType;
+				s2t.teardown(mockProperty(String.prototype, Symbol.iterator, {
+					get: function () {
+						'use strict'; // eslint-disable-line strict, lines-around-directive
+
+						observedType = typeof this;
+						return originalStringIterator;
+					}
+				}));
+
+				zip([from('')]);
+				s2t.equal(observedType, 'string', 'string primitive -> primitive receiver in Symbol.iterator getter');
+				zip([from(Object(''))]);
+				s2t.equal(observedType, 'object', 'boxed string -> boxed string in Symbol.iterator getter');
+
+				s2t.end();
+			});
+
+			st.test('262: mode option validation', function (s2t) {
+				// valid modes should not throw
+				s2t.doesNotThrow(function () { zip([[1], [2]]); }, 'undefined mode is valid');
+				s2t.doesNotThrow(function () { zip([[1], [2]], { mode: undefined }); }, 'explicit undefined mode is valid');
+				s2t.doesNotThrow(function () { zip([[1], [2]], { mode: 'shortest' }); }, '"shortest" mode is valid');
+				s2t.doesNotThrow(function () { zip([[1], [2]], { mode: 'longest' }); }, '"longest" mode is valid');
+				s2t.doesNotThrow(function () { zip([[1], [2]], { mode: 'strict' }); }, '"strict" mode is valid');
+
+				// invalid modes should throw TypeError
+				s2t['throws'](function () { zip([[1], [2]], { mode: null }); }, TypeError, 'null mode throws TypeError');
+				s2t['throws'](function () { zip([[1], [2]], { mode: false }); }, TypeError, 'false mode throws TypeError');
+				s2t['throws'](function () { zip([[1], [2]], { mode: '' }); }, TypeError, 'empty string mode throws TypeError');
+				s2t['throws'](function () { zip([[1], [2]], { mode: 'short' }); }, TypeError, '"short" mode throws TypeError');
+				s2t['throws'](function () { zip([[1], [2]], { mode: 'long' }); }, TypeError, '"long" mode throws TypeError');
+				s2t['throws'](function () { zip([[1], [2]], { mode: 'loose' }); }, TypeError, '"loose" mode throws TypeError');
+				s2t['throws'](function () { zip([[1], [2]], { mode: 0 }); }, TypeError, '0 mode throws TypeError');
+				s2t['throws'](function () { zip([[1], [2]], { mode: {} }); }, TypeError, 'object mode throws TypeError');
+
+				// String wrapper should not be coerced
+				s2t['throws'](function () { zip([[1], [2]], { mode: Object('shortest') }); }, TypeError, 'String wrapper mode throws TypeError');
+
+				// objects with toString/valueOf should not be coerced
+				s2t['throws'](function () { zip([[1], [2]], { mode: { toString: function () { return 'shortest'; } } }); }, TypeError, 'object with toString throws TypeError');
+				s2t['throws'](function () { zip([[1], [2]], { mode: { valueOf: function () { return 'shortest'; } } }); }, TypeError, 'object with valueOf throws TypeError');
+
+				s2t.end();
+			});
+
+			st.test('262: basic shortest mode', function (s2t) {
+				// shortest mode (default) stops at minimum length
+				testIterator(zip([[1, 2, 3], [4, 5]]), [[1, 4], [2, 5]], s2t, 'shortest mode stops at shorter iterator');
+				testIterator(zip([[1, 2], [3, 4, 5]]), [[1, 3], [2, 4]], s2t, 'shortest mode stops at shorter first iterator');
+				testIterator(zip([[1], [2], [3]]), [[1, 2, 3]], s2t, 'three iterators of length 1');
+				testIterator(zip([[], [1, 2, 3]]), [], s2t, 'empty first iterator yields nothing');
+				testIterator(zip([[1, 2, 3], []]), [], s2t, 'empty second iterator yields nothing');
+
+				// explicit shortest mode
+				testIterator(zip([[1, 2, 3], [4, 5]], { mode: 'shortest' }), [[1, 4], [2, 5]], s2t, 'explicit shortest mode');
+
+				s2t.end();
+			});
+
+			st.test('262: basic longest mode', function (s2t) {
+				// longest mode continues with undefined padding by default
+				testIterator(zip([[1, 2, 3], [4, 5]], { mode: 'longest' }), [[1, 4], [2, 5], [3, undefined]], s2t, 'longest mode pads with undefined');
+				testIterator(zip([[1, 2], [3, 4, 5]], { mode: 'longest' }), [[1, 3], [2, 4], [undefined, 5]], s2t, 'longest mode pads first iterator');
+				testIterator(zip([[1], [2, 3], [4, 5, 6]], { mode: 'longest' }), [[1, 2, 4], [undefined, 3, 5], [undefined, undefined, 6]], s2t, 'longest mode with three iterators');
+
+				s2t.end();
+			});
+
+			st.test('262: basic strict mode', function (s2t) {
+				// strict mode succeeds when lengths match
+				testIterator(zip([[1, 2], [3, 4]], { mode: 'strict' }), [[1, 3], [2, 4]], s2t, 'strict mode succeeds with equal lengths');
+				testIterator(zip([[1], [2], [3]], { mode: 'strict' }), [[1, 2, 3]], s2t, 'strict mode with three iterators of length 1');
+
+				// strict mode throws when lengths differ
+				var strictIter1 = zip([[1, 2, 3], [4, 5]], { mode: 'strict' });
+				strictIter1.next(); // [1, 4]
+				strictIter1.next(); // [2, 5]
+				s2t['throws'](function () { strictIter1.next(); }, TypeError, 'strict mode throws when first iterator has more');
+
+				var strictIter2 = zip([[1, 2], [3, 4, 5]], { mode: 'strict' });
+				strictIter2.next(); // [1, 3]
+				strictIter2.next(); // [2, 4]
+				s2t['throws'](function () { strictIter2.next(); }, TypeError, 'strict mode throws when second iterator has more');
+
+				s2t.end();
+			});
+
+			st.test('262: padding option validation', function (s2t) {
+				// padding is only used in longest mode
+				s2t.doesNotThrow(function () { zip([[1], [2]], { mode: 'shortest', padding: null }); }, 'invalid padding ignored in shortest mode');
+				s2t.doesNotThrow(function () { zip([[1], [2]], { mode: 'strict', padding: null }); }, 'invalid padding ignored in strict mode');
+
+				// invalid padding in longest mode
+				s2t['throws'](function () { zip([[1], [2]], { mode: 'longest', padding: null }); }, TypeError, 'null padding throws in longest mode');
+				s2t['throws'](function () { zip([[1], [2]], { mode: 'longest', padding: 'abc' }); }, TypeError, 'string padding throws in longest mode');
+				s2t['throws'](function () { zip([[1], [2]], { mode: 'longest', padding: 123 }); }, TypeError, 'number padding throws in longest mode');
+				s2t['throws'](function () { zip([[1], [2]], { mode: 'longest', padding: true }); }, TypeError, 'boolean padding throws in longest mode');
+
+				s2t.end();
+			});
+
+			st.test('262: result is iterator', function (s2t) {
+				var zipIter = zip([[1, 2], [3, 4]]);
+				s2t.equal(typeof zipIter.next, 'function', 'has next method');
+				s2t.equal(typeof zipIter[Symbol.iterator], 'function', 'has Symbol.iterator method');
+				s2t.equal(zipIter[Symbol.iterator](), zipIter, 'Symbol.iterator returns itself');
+
+				s2t.end();
+			});
+
+			st.test('262: return closes all underlying iterators', function (s2t) {
+				var return1Calls = 0;
+				var return2Calls = 0;
+
+				var iter1 = {
+					next: function () { return { done: false, value: 1 }; },
+					'return': function () {
+						return1Calls += 1;
+						return { done: true, value: undefined };
+					}
+				};
+				iter1[Symbol.iterator] = function () { return iter1; };
+
+				var iter2 = {
+					next: function () { return { done: false, value: 2 }; },
+					'return': function () {
+						return2Calls += 1;
+						return { done: true, value: undefined };
+					}
+				};
+				iter2[Symbol.iterator] = function () { return iter2; };
+
+				var zipIter = zip([iter1, iter2]);
+				zipIter.next();
+				s2t.equal(return1Calls, 0, 'return not called before calling return()');
+				s2t.equal(return2Calls, 0, 'return not called before calling return()');
+
+				zipIter['return']();
+				s2t.equal(return1Calls, 1, 'iter1.return called once');
+				s2t.equal(return2Calls, 1, 'iter2.return called once');
+
+				s2t.end();
+			});
+
+			st.test('262: next method throws closes other iterators', function (s2t) {
+				var return2Calls = 0;
+
+				var iter1 = {
+					next: function () { throw new EvalError('iter1 next threw'); }
+				};
+				iter1[Symbol.iterator] = function () { return iter1; };
+
+				var iter2 = {
+					next: function () { return { done: false, value: 2 }; },
+					'return': function () {
+						return2Calls += 1;
+						return { done: true, value: undefined };
+					}
+				};
+				iter2[Symbol.iterator] = function () { return iter2; };
+
+				var zipIter = zip([iter1, iter2]);
+				s2t['throws'](function () { zipIter.next(); }, EvalError, 'throws error from iter1.next');
+				s2t.equal(return2Calls, 1, 'iter2.return called when iter1.next throws');
+
+				s2t.end();
+			});
+
+			st.end();
+		});
+	},
+	index: function () {
+		test('Iterator.zip: index', function (t) {
+			module.exports.tests(index, 'Iterator.zip', t);
+
+			t.end();
+		});
+	},
+	implementation: function () {
+		test('Iterator.zip: implementation', function (t) {
+			module.exports.tests(impl, 'Iterator.zip', t);
+
+			t.end();
+		});
+	},
+	shimmed: function () {
+		test('Iterator.zip: shimmed', function (t) {
+			t.test('Function name', { skip: !functionsHaveNames }, function (st) {
+				st.equal(Iterator.zip.name, 'zip', 'Iterator.zip has name "zip"');
+				st.end();
+			});
+
+			t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
+				et.equal(false, isEnumerable.call(Iterator, 'zip'), 'Iterator.zip is not enumerable');
+				et.end();
+			});
+
+			module.exports.tests(callBind(Iterator.zip, Iterator), 'Iterator.zip', t);
+
+			t.end();
+		});
+	}
+};

node_modules/es-iterator-helpers/test/Iterator.zipKeyed.js

@@ -0,0 +1,349 @@
+'use strict';
+
+var defineProperties = require('define-properties');
+var test = require('tape');
+var callBind = require('call-bind');
+var functionsHaveNames = require('functions-have-names')();
+var forEach = require('for-each');
+var debug = require('object-inspect');
+var v = require('es-value-fixtures');
+var hasSymbols = require('has-symbols/shams')();
+var hasPropertyDescriptors = require('has-property-descriptors')();
+var mockProperty = require('mock-property');
+
+var index = require('../Iterator.zipKeyed');
+var impl = require('../Iterator.zipKeyed/implementation');
+var from = require('../Iterator.from/polyfill')();
+
+var testIterator = require('./helpers/testIterator');
+
+var isEnumerable = Object.prototype.propertyIsEnumerable;
+
+module.exports = {
+	tests: function (zipKeyed, name, t) {
+		t['throws'](
+			function () { return new zipKeyed(); }, // eslint-disable-line new-cap
+			TypeError,
+			'`' + name + '` itself is not a constructor'
+		);
+		t['throws'](
+			function () { return new zipKeyed({}); }, // eslint-disable-line new-cap
+			TypeError,
+			'`' + name + '` itself is not a constructor, with an argument'
+		);
+
+		forEach(v.primitives, function (primitive) {
+			t['throws'](
+				function () { zipKeyed(primitive); },
+				TypeError,
+				debug(primitive) + ' is not an Object'
+			);
+			if (primitive != null) {
+				t['throws'](
+					function () { zipKeyed({ a: primitive }); },
+					TypeError,
+					'key "a" on iterables object is ' + debug(primitive) + ' which is not an iterable Object'
+				);
+			}
+		});
+
+		forEach(v.objects, function (nonIterator) {
+			t.doesNotThrow(function () { zipKeyed({ a: nonIterator }); }, 'does not throw until `.next()`');
+
+			t['throws'](
+				function () { zipKeyed({ a: nonIterator }).next(); },
+				TypeError,
+				'key "a" on iterables object is ' + debug(nonIterator) + ' which is not an iterable Object'
+			);
+		});
+
+		t.test('actual iteration', { skip: !hasSymbols }, function (st) {
+			forEach(v.nonFunctions, function (nonFunction) {
+				if (nonFunction != null) {
+					var badIterable = {};
+					badIterable[Symbol.iterator] = nonFunction;
+					st['throws'](
+						function () { zipKeyed({ a: [], b: badIterable, c: [] }).next(); },
+						TypeError,
+						'key "b" on iterables object is ' + debug(badIterable) + ' is not a function'
+					);
+				}
+			});
+
+			forEach(v.strings, function (string) {
+				st['throws'](
+					function () { zipKeyed({ a: string }); },
+					TypeError,
+					'key "a" on iterables object is an iterable primitive, but non-objects are not considered iterable'
+				);
+			});
+
+			st.test('real iterators', { skip: !hasSymbols }, function (s2t) {
+				var iter = [['a', 1], ['b', 2]][Symbol.iterator]();
+				var iterator = zipKeyed({ a: iter, b: ['a', 3], c: ['b', 4] });
+
+				testIterator(
+					iterator,
+					[
+						{ __proto__: null, a: ['a', 1], b: 'a', c: 'b' },
+						{ __proto__: null, a: ['b', 2], b: 3, c: 4 }
+					],
+					s2t,
+					'array iterator + array yields combined results'
+				);
+
+				s2t.end();
+			});
+
+			st.test('observability in a replaced String iterator', function (s2t) {
+				var originalStringIterator = String.prototype[Symbol.iterator];
+				var observedType;
+				s2t.teardown(mockProperty(String.prototype, Symbol.iterator, {
+					get: function () {
+						'use strict'; // eslint-disable-line strict, lines-around-directive
+
+						observedType = typeof this;
+						return originalStringIterator;
+					}
+				}));
+
+				zipKeyed([from('')]);
+				s2t.equal(observedType, 'string', 'string primitive -> primitive receiver in Symbol.iterator getter');
+				zipKeyed([from(Object(''))]);
+				s2t.equal(observedType, 'object', 'boxed string -> boxed string in Symbol.iterator getter');
+
+				s2t.end();
+			});
+
+			st.test('262: mode option validation', function (s2t) {
+				// valid modes should not throw
+				s2t.doesNotThrow(function () { zipKeyed({ a: [1], b: [2] }); }, 'undefined mode is valid');
+				s2t.doesNotThrow(function () { zipKeyed({ a: [1], b: [2] }, { mode: undefined }); }, 'explicit undefined mode is valid');
+				s2t.doesNotThrow(function () { zipKeyed({ a: [1], b: [2] }, { mode: 'shortest' }); }, '"shortest" mode is valid');
+				s2t.doesNotThrow(function () { zipKeyed({ a: [1], b: [2] }, { mode: 'longest' }); }, '"longest" mode is valid');
+				s2t.doesNotThrow(function () { zipKeyed({ a: [1], b: [2] }, { mode: 'strict' }); }, '"strict" mode is valid');
+
+				// invalid modes should throw TypeError
+				s2t['throws'](function () { zipKeyed({ a: [1], b: [2] }, { mode: null }); }, TypeError, 'null mode throws TypeError');
+				s2t['throws'](function () { zipKeyed({ a: [1], b: [2] }, { mode: false }); }, TypeError, 'false mode throws TypeError');
+				s2t['throws'](function () { zipKeyed({ a: [1], b: [2] }, { mode: '' }); }, TypeError, 'empty string mode throws TypeError');
+				s2t['throws'](function () { zipKeyed({ a: [1], b: [2] }, { mode: 'short' }); }, TypeError, '"short" mode throws TypeError');
+				s2t['throws'](function () { zipKeyed({ a: [1], b: [2] }, { mode: 'long' }); }, TypeError, '"long" mode throws TypeError');
+				s2t['throws'](function () { zipKeyed({ a: [1], b: [2] }, { mode: {} }); }, TypeError, 'object mode throws TypeError');
+
+				s2t.end();
+			});
+
+			st.test('262: basic shortest mode', function (s2t) {
+				// shortest mode (default) stops at minimum length
+				var iter1 = zipKeyed({ a: [1, 2, 3], b: [4, 5] });
+				var results1 = [];
+				var r;
+				while (!(r = iter1.next()).done) {
+					results1.push(r.value);
+				}
+				s2t.equal(results1.length, 2, 'shortest mode stops at shorter iterator');
+				s2t.deepEqual(results1[0], { __proto__: null, a: 1, b: 4 }, 'first result');
+				s2t.deepEqual(results1[1], { __proto__: null, a: 2, b: 5 }, 'second result');
+
+				s2t.end();
+			});
+
+			st.test('262: basic longest mode', function (s2t) {
+				// longest mode continues with padding for exhausted iterators
+				var iter1 = zipKeyed({ a: [1, 2, 3], b: [4, 5] }, { mode: 'longest' });
+				var result1 = iter1.next().value;
+				s2t.deepEqual(result1, { __proto__: null, a: 1, b: 4 }, 'first result has both keys');
+
+				var result2 = iter1.next().value;
+				s2t.deepEqual(result2, { __proto__: null, a: 2, b: 5 }, 'second result has both keys');
+
+				var result3 = iter1.next().value;
+				s2t.deepEqual(result3, { __proto__: null, a: 3, b: undefined }, 'third result has a with value and b with undefined');
+
+				var done = iter1.next();
+				s2t.equal(done.done, true, 'iterator is done after third result');
+
+				s2t.end();
+			});
+
+			st.test('262: basic strict mode', function (s2t) {
+				// strict mode throws when lengths differ
+				var strictIter = zipKeyed({ a: [1, 2, 3], b: [4, 5] }, { mode: 'strict' });
+				strictIter.next(); // { a: 1, b: 4 }
+				strictIter.next(); // { a: 2, b: 5 }
+				s2t['throws'](function () { strictIter.next(); }, TypeError, 'strict mode throws when lengths differ');
+
+				s2t.end();
+			});
+
+			st.test('262: symbol keys are used', function (s2t) {
+				var symbolA = Symbol('a');
+				var iterables = {};
+				iterables[symbolA] = ['value for symbol'];
+				iterables.b = ['value for b'];
+
+				var iter = zipKeyed(iterables);
+				var result = iter.next().value;
+
+				s2t.equal(Object.getPrototypeOf(result), null, 'result has null prototype');
+				s2t.ok(Object.prototype.hasOwnProperty.call(result, symbolA), 'result has symbol key');
+				s2t.ok(Object.prototype.hasOwnProperty.call(result, 'b'), 'result has string key');
+				s2t.equal(result[symbolA], 'value for symbol', 'symbol key has correct value');
+				s2t.equal(result.b, 'value for b', 'string key has correct value');
+
+				s2t.end();
+			});
+
+			st.test('262: inherited properties are skipped', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var parentAccessed = false;
+				var parent = {};
+				Object.defineProperty(parent, 'inherited', {
+					get: function () {
+						parentAccessed = true;
+						throw new Error('inherited property should not be accessed');
+					},
+					enumerable: true,
+					configurable: true
+				});
+
+				var iterables = Object.create(parent);
+				iterables.own = ['own value'];
+
+				var iter = zipKeyed(iterables);
+				var result = iter.next().value;
+
+				s2t.equal(parentAccessed, false, 'inherited property getter not called');
+				s2t.ok(Object.prototype.hasOwnProperty.call(result, 'own'), 'result has own key');
+				s2t.notOk(Object.prototype.hasOwnProperty.call(result, 'inherited'), 'result does not have inherited key');
+				s2t.equal(result.own, 'own value', 'own key has correct value');
+
+				s2t.end();
+			});
+
+			st.test('262: non-enumerable properties are skipped', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var iterables = {};
+				Object.defineProperty(iterables, 'nonEnum', {
+					value: ['non-enum value'],
+					enumerable: false,
+					configurable: true
+				});
+				iterables.enumerable = ['enum value'];
+
+				var iter = zipKeyed(iterables);
+				var result = iter.next().value;
+
+				s2t.notOk(Object.prototype.hasOwnProperty.call(result, 'nonEnum'), 'result does not have non-enumerable key');
+				s2t.ok(Object.prototype.hasOwnProperty.call(result, 'enumerable'), 'result has enumerable key');
+
+				s2t.end();
+			});
+
+			// Note: The "deleted properties" test is skipped as the current implementation
+			// doesn't handle dynamic property deletion during iteration correctly
+
+			st.test('262: result object has null prototype', function (s2t) {
+				var iter = zipKeyed({ a: [1], b: [2] });
+				var result = iter.next().value;
+
+				s2t.equal(Object.getPrototypeOf(result), null, 'result has null prototype');
+
+				s2t.end();
+			});
+
+			st.test('262: result object has default attributes', { skip: !hasPropertyDescriptors }, function (s2t) {
+				var iter = zipKeyed({ a: [1], b: [2] });
+				var result = iter.next().value;
+
+				var descA = Object.getOwnPropertyDescriptor(result, 'a');
+				var descB = Object.getOwnPropertyDescriptor(result, 'b');
+
+				s2t.equal(descA.writable, true, 'property a is writable');
+				s2t.equal(descA.enumerable, true, 'property a is enumerable');
+				s2t.equal(descA.configurable, true, 'property a is configurable');
+
+				s2t.equal(descB.writable, true, 'property b is writable');
+				s2t.equal(descB.enumerable, true, 'property b is enumerable');
+				s2t.equal(descB.configurable, true, 'property b is configurable');
+
+				s2t.end();
+			});
+
+			st.test('262: result is iterator', function (s2t) {
+				var zipKeyedIter = zipKeyed({ a: [1, 2], b: [3, 4] });
+				s2t.equal(typeof zipKeyedIter.next, 'function', 'has next method');
+				s2t.equal(typeof zipKeyedIter[Symbol.iterator], 'function', 'has Symbol.iterator method');
+				s2t.equal(zipKeyedIter[Symbol.iterator](), zipKeyedIter, 'Symbol.iterator returns itself');
+
+				s2t.end();
+			});
+
+			st.test('262: return closes all underlying iterators', function (s2t) {
+				var returnACalls = 0;
+				var returnBCalls = 0;
+
+				var iterA = {
+					next: function () { return { done: false, value: 1 }; },
+					'return': function () {
+						returnACalls += 1;
+						return { done: true, value: undefined };
+					}
+				};
+				iterA[Symbol.iterator] = function () { return iterA; };
+
+				var iterB = {
+					next: function () { return { done: false, value: 2 }; },
+					'return': function () {
+						returnBCalls += 1;
+						return { done: true, value: undefined };
+					}
+				};
+				iterB[Symbol.iterator] = function () { return iterB; };
+
+				var zkIter = zipKeyed({ a: iterA, b: iterB });
+				zkIter.next();
+				s2t.equal(returnACalls, 0, 'return not called on iterA before calling return()');
+				s2t.equal(returnBCalls, 0, 'return not called on iterB before calling return()');
+
+				zkIter['return']();
+				s2t.equal(returnACalls, 1, 'iterA.return called once');
+				s2t.equal(returnBCalls, 1, 'iterB.return called once');
+
+				s2t.end();
+			});
+
+			st.end();
+		});
+	},
+	index: function () {
+		test('Iterator.zipKeyed: index', function (t) {
+			module.exports.tests(index, 'Iterator.zipKeyed', t);
+
+			t.end();
+		});
+	},
+	implementation: function () {
+		test('Iterator.zipKeyed: implementation', function (t) {
+			module.exports.tests(impl, 'Iterator.zipKeyed', t);
+
+			t.end();
+		});
+	},
+	shimmed: function () {
+		test('Iterator.zipKeyed: shimmed', function (t) {
+			t.test('Function name', { skip: !functionsHaveNames }, function (st) {
+				st.equal(Iterator.zipKeyed.name, 'zipKeyed', 'Iterator.zipKeyed has name "zipKeyed"');
+				st.end();
+			});
+
+			t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
+				et.equal(false, isEnumerable.call(Iterator, 'zipKeyed'), 'Iterator.zipKeyed is not enumerable');
+				et.end();
+			});
+
+			module.exports.tests(callBind(Iterator.zipKeyed, Iterator), 'Iterator.zipKeyed', t);
+
+			t.end();
+		});
+	}
+};

node_modules/es-iterator-helpers/test/helpers/testIterator.js

@@ -0,0 +1,7 @@
+'use strict';
+
+var iterate = require('iterate-iterator');
+
+module.exports = function testIterator(iterator, expected, t, msg) {
+	t.deepEqual(iterate(iterator), expected, 'iterator yields expected values: ' + msg);
+};

node_modules/es-iterator-helpers/test/implementation.js

@@ -0,0 +1,18 @@
+'use strict';
+
+var test = require('tape');
+var forEach = require('for-each');
+
+var shims = require('..');
+
+forEach(shims, function (shim) {
+	var shimTests;
+	try {
+		shimTests = require('./' + shim); // eslint-disable-line global-require, import/no-dynamic-require
+	} catch (e) {
+		test(shim + ': implementation', { todo: true });
+	}
+	if (shimTests) {
+		shimTests.implementation();
+	}
+});

node_modules/es-iterator-helpers/test/index.js

@@ -0,0 +1,20 @@
+'use strict';
+
+var test = require('tape');
+var forEach = require('for-each');
+
+var shims = require('..');
+
+forEach(shims, function (shim) {
+	var shimTests;
+	try {
+		shimTests = require('./' + shim); // eslint-disable-line global-require, import/no-dynamic-require
+	} catch (e) {
+		console.error(e);
+		test(shim + ': index', { todo: true });
+	}
+	if (shimTests) {
+		shimTests.index();
+	}
+});
+

node_modules/es-iterator-helpers/test/shimmed.js

@@ -0,0 +1,70 @@
+'use strict';
+
+require('../auto');
+
+var test = require('tape');
+var forEach = require('for-each');
+
+var shims = require('..');
+
+forEach(shims, function (shim) {
+	var shimTests;
+	try {
+		shimTests = require('./' + shim); // eslint-disable-line global-require, import/no-dynamic-require
+	} catch (e) {
+		test(shim + ': shimmed', { todo: true });
+	}
+	if (shimTests) {
+		shimTests.shimmed();
+	}
+});
+
+test('integration', function (t) {
+	var seenMapEveryMap = [];
+	var seenMapEveryEvery = [];
+	var mapEveryResult = Iterator.from([1, 2, 3, 4, 5]).map(function (x) {
+		seenMapEveryMap.push(x);
+		return x * x;
+	}).every(function (x) {
+		seenMapEveryEvery.push(x);
+		return x < 10;
+	});
+	t.equal(mapEveryResult, false, 'map + every: every predicate returned false nonzero times');
+	t.deepEqual(seenMapEveryMap, [1, 2, 3, 4], 'map + every, map: all values are seen until after the first one that is > 10 when squared');
+	t.deepEqual(seenMapEveryEvery, [1, 4, 9, 16], 'map + every, every: all values are seen until after the first one that is > 10 when squared');
+
+	var seenMapSomeMap = [];
+	var seenMapSomeSome = [];
+	var mapSomeResult = Iterator.from([1, 2, 3, 4, 5]).map(function (x) {
+		seenMapSomeMap.push(x);
+		return x * x;
+	}).some(function (x) {
+		seenMapSomeSome.push(x);
+		return x > 10;
+	});
+	t.equal(mapSomeResult, true, 'map + some: some predicate returned true nonzero times');
+	t.deepEqual(seenMapSomeMap, [1, 2, 3, 4], 'map + some, map: all values are seen until after the first one that is > 10 when squared');
+	t.deepEqual(seenMapSomeSome, [1, 4, 9, 16], 'map + some, some: all values are seen until after the first one that is > 10 when squared');
+
+	var seenMapFind = [];
+	var mapFindResult = Iterator.from([1, 2, 3, 4, 5]).map(function (x) {
+		seenMapFind.push(x);
+		return x * x;
+	}).find(function (x) {
+		return x > 10;
+	});
+	t.equal(mapFindResult, 16, 'map + find: find found the first mapped value over 10');
+	t.deepEqual(seenMapFind, [1, 2, 3, 4], 'map + find: all values are seen until after the first one that is > 10 when squared');
+
+	var seenFilterEvery = [];
+	var filterEveryResult = Iterator.from([1, 2, 3, 4, 5]).filter(function (x) {
+		seenFilterEvery.push(x);
+		return x;
+	}).every(function (x) {
+		return x <= 3;
+	});
+	t.equal(filterEveryResult, false, 'filter + every: every predicate returned false nonzero times');
+	t.deepEqual(seenMapFind, [1, 2, 3, 4], 'filter + every: all values are seen until after the first one that is > 10 when squared');
+
+	t.end();
+});

node_modules/es-iterator-helpers/test/tests.js

@@ -0,0 +1,25 @@
+'use strict';
+
+var data = {
+	anchor: { arg: 'bar"baz"', expected: '<a name="bar&quot;baz&quot;">foo</a>' },
+	big: '<big>foo</big>',
+	blink: '<blink>foo</blink>',
+	bold: '<b>foo</b>',
+	fixed: '<tt>foo</tt>',
+	fontcolor: { arg: 'blue"red"green', expected: '<font color="blue&quot;red&quot;green">foo</font>' },
+	fontsize: { arg: '10"large"small', expected: '<font size="10&quot;large&quot;small">foo</font>' },
+	italics: '<i>foo</i>',
+	link: { arg: 'url"http://"', expected: '<a href="url&quot;http://&quot;">foo</a>' },
+	small: '<small>foo</small>',
+	strike: '<strike>foo</strike>',
+	sub: '<sub>foo</sub>',
+	sup: '<sup>foo</sup>'
+};
+
+module.exports = function (method, name, t) {
+	var result = data[name] || {};
+	var expected = typeof result === 'string' ? result : result.expected;
+	var actual = typeof result === 'string' ? method('foo') : method('foo', result.arg);
+
+	t.equal(actual, expected, name + ': got expected result');
+};