LayoutTests/ietestcenter/Javascript/TestCases/15.4.4.14-2-2.js

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ES5Harness.registerTest({

    id: "15.4.4.14-2-2",

    path: "TestCases/chapter15/15.4/15.4.4/15.4.4.14/15.4.4.14-2-2.js",

    description: "Array.prototype.indexOf when 'length' is own data property on an Array",

    test: function testcase() {
        var targetObj = {};
        try {
            Array.prototype[2] = targetObj;
            
            return [0, targetObj].indexOf(targetObj) === 1 &&
                [0, 1].indexOf(targetObj) === -1;

        } finally {
            delete Array.prototype[2];
        }
    },

    precondition: function prereq() {
        return fnExists(Array.prototype.indexOf);
    }

});