238 lines
7.3 KiB
Plaintext
238 lines
7.3 KiB
Plaintext
'use strict';
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var defineProperties = require('define-properties');
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var test = require('tape');
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var callBind = require('call-bind');
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var functionsHaveNames = require('functions-have-names')();
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var hasStrictMode = require('has-strict-mode')();
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var forEach = require('for-each');
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var debug = require('object-inspect');
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var v = require('es-value-fixtures');
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var hasSymbols = require('has-symbols/shams')();
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var StringToCodePoints = require('es-abstract/2023/StringToCodePoints');
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var index = require('../Iterator.prototype.flatMap');
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var impl = require('../Iterator.prototype.flatMap/implementation');
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var fnName = 'flatMap';
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var isEnumerable = Object.prototype.propertyIsEnumerable;
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var testIterator = require('./helpers/testIterator');
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module.exports = {
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tests: function (flatMap, name, t) {
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t['throws'](
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function () { return new flatMap(); }, // eslint-disable-line new-cap
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TypeError,
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'`' + name + '` is not a constructor'
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);
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forEach(v.primitives.concat(v.objects), function (nonIterator) {
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t['throws'](
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function () { flatMap(nonIterator); },
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TypeError,
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debug(nonIterator) + ' is not an Object with a callable `next` method'
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);
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var badNext = { next: nonIterator };
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t['throws'](
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function () { flatMap(badNext); },
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TypeError,
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debug(badNext) + ' is not an Object with a callable `next` method'
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);
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});
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forEach(v.nonFunctions, function (nonFunction) {
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t['throws'](
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function () { flatMap({ next: function () {} }, nonFunction); },
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TypeError,
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debug(nonFunction) + ' is not a function'
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);
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});
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t.test('actual iteration', { skip: !hasSymbols }, function (st) {
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var arr = [1, 2, 3];
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var iterator = callBind(arr[Symbol.iterator], arr);
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st['throws'](
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function () { return new flatMap(iterator()); }, // eslint-disable-line new-cap
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TypeError,
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'`' + name + '` iterator is not a constructor'
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);
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st['throws'](
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function () { return new flatMap(iterator(), function () {}); }, // eslint-disable-line new-cap
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TypeError,
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'`' + name + '` iterator is not a constructor'
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);
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testIterator(iterator(), [1, 2, 3], st, 'original');
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var nonIterableFlatMap = flatMap(iterator(), function (x) { return x; });
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st['throws'](
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function () { nonIterableFlatMap.next(); },
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TypeError,
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'non-iterable return value throws'
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);
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forEach(v.strings, function (string) {
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st['throws'](
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function () { flatMap(iterator(), function () { return string; }).next(); },
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TypeError,
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'non-object return value throws even if iterable (' + debug(string) + ')'
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);
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testIterator(
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flatMap(iterator(), function () { return Object(string); }),
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[].concat(StringToCodePoints(string), StringToCodePoints(string), StringToCodePoints(string)),
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st,
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'boxed string (' + debug(string) + ')'
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);
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});
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testIterator(flatMap(iterator(), function (x) { return [x][Symbol.iterator](); }), [1, 2, 3], st, 'identity mapper in array iterator');
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testIterator(flatMap(iterator(), function (x) { return [2 * x][Symbol.iterator](); }), [2, 4, 6], st, 'doubler mapper in array iterator');
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testIterator(flatMap(iterator(), function () { return []; }), [], st, 'empty mapper in nested array iterator');
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testIterator(flatMap(iterator(), function (x) { return [[x, x + 1]][Symbol.iterator](); }), [[1, 2], [2, 3], [3, 4]], st, 'identity mapper in nested array iterator');
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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');
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testIterator(flatMap([0, 1, 2, 3][Symbol.iterator](), function (value) {
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var result = [];
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for (var i = 0; i < value; ++i) {
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result.push(value);
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}
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return result;
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}), [1, 2, 2, 3, 3, 3], st, 'test262: test/built-ins/Iterator/prototype/flatMap/flattens-iteratable');
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testIterator(flatMap([0, 1, 2, 3][Symbol.iterator](), function (value) {
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var i = 0;
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return {
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next: function () {
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if (i < value) {
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i += 1;
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return {
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value: value,
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done: false
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};
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}
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return {
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value: undefined,
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done: true
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};
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}
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};
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}), [1, 2, 2, 3, 3, 3], st, 'test262: test/built-ins/Iterator/prototype/flatMap/flattens-iterator');
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testIterator(flatMap([0][Symbol.iterator](), function () {
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var n = [0, 1, 2][Symbol.iterator]();
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var ret = {
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next: function next() {
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return n.next();
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}
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};
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ret[Symbol.iterator] = null;
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return ret;
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}), [0, 1, 2], st, 'test262: test/built-ins/Iterator/prototype/flatMap/iterable-to-iterator-fallback');
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var counts = [];
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testIterator(flatMap(['a', 'b', 'c', 'd', 'e'][Symbol.iterator](), function (value, count) {
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counts.push(count);
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if (value === 'a' || value === 'b') {
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return [0];
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}
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if (value === 'c') {
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return [1, 2];
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}
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if (value === 'd') {
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return [3, 4, 5];
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}
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if (value === 'e') {
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return [6, 7, 8, 9];
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}
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return st.fail('got unexpected value: ' + debug(v));
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}), [0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9], st, 'test262: test/built-ins/Iterator/prototype/flatMap/mapper-args');
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st.deepEqual(counts, [0, 1, 2, 3, 4], 'count values are as expected');
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st.test('return protocol', function (s2t) {
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var returnCount = 0;
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var iter = flatMap([0][Symbol.iterator](), function () {
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return {
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next: function next() {
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return {
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done: false,
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value: 1
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};
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},
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'return': function () {
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returnCount += 1;
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return {};
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}
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};
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});
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s2t.equal(returnCount, 0, '`return` is not called yet');
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s2t.deepEqual(iter.next(), {
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done: false,
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value: 1
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});
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s2t.equal(returnCount, 0, '`return` is not called after first yield');
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iter['return']();
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s2t.equal(returnCount, 1, '`return` is called when iterator return is called');
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iter['return']();
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s2t.equal(returnCount, 1, '`return` is not called again when iterator return is called again');
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s2t.end();
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});
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st.end();
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});
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},
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index: function () {
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test('Iterator.prototype.' + fnName + ': index', function (t) {
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module.exports.tests(index, 'Iterator.prototype.' + fnName, t);
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t.end();
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});
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},
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implementation: function () {
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test('Iterator.prototype.' + fnName + ': implementation', function (t) {
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module.exports.tests(callBind(impl), 'Iterator.prototype.' + fnName, t);
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t.end();
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});
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},
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shimmed: function () {
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test('Iterator.prototype.' + fnName + ': shimmed', function (t) {
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t.test('Function name', { skip: !functionsHaveNames }, function (st) {
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st.equal(Iterator.prototype[fnName].name, fnName, 'Iterator#' + fnName + ' has name "' + fnName + '"');
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st.end();
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});
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t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
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et.equal(false, isEnumerable.call(Iterator.prototype, fnName), 'Iterator#' + fnName + ' is not enumerable');
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et.end();
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});
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t.test('bad string/this value', { skip: !hasStrictMode }, function (st) {
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st['throws'](function () { return Iterator.prototype[fnName].call(undefined, 'a'); }, TypeError, 'undefined is not an object');
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st['throws'](function () { return Iterator.prototype[fnName].call(null, 'a'); }, TypeError, 'null is not an object');
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st.end();
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});
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module.exports.tests(callBind(Iterator.prototype[fnName]), 'Iterator.prototype.' + fnName, t);
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t.end();
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});
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}
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};
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