test/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-2.js


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// Copyright (c) 2012 Ecma International.  All rights reserved.
// Ecma International makes this code available under the terms and conditions set
// forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the
// "Use Terms").   Any redistribution of this code must retain the above
// copyright and this notice and otherwise comply with the Use Terms.

/*---
es5id: 15.4.4.15-3-2
description: >
    Array.prototype.lastIndexOf return -1 when value of 'length' is a
    boolean (value is true)
includes: [runTestCase.js]
---*/

function testcase() {
        var obj = { 0: 0, 1: 1, length: true };
        return Array.prototype.lastIndexOf.call(obj, 0) === 0 &&
            Array.prototype.lastIndexOf.call(obj, 1) === -1;
    }
runTestCase(testcase);