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28 lines
1.1 KiB
JavaScript
28 lines
1.1 KiB
JavaScript
/// Copyright (c) 2012 Ecma International. All rights reserved.
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/// Ecma International makes this code available under the terms and conditions set
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/// forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the
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/// "Use Terms"). Any redistribution of this code must retain the above
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/// copyright and this notice and otherwise comply with the Use Terms.
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/**
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* @path ch15/15.4/15.4.4/15.4.4.14/15.4.4.14-5-21.js
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* @description Array.prototype.indexOf - value of 'fromIndex' is an Object, which has an own toString method
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*/
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function testcase() {
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// objects inherit the default valueOf() method from Object
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// that simply returns itself. Since the default valueOf() method
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// does not return a primitive value, ES next tries to convert the object
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// to a number by calling its toString() method and converting the
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// resulting string to a number.
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var fromIndex = {
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toString: function () {
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return '1';
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}
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};
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return [0, true].indexOf(true, fromIndex) === 1;
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}
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runTestCase(testcase);
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