LayoutTests/ietestcenter/Javascript/TestCases/15.4.4.14-9-b-i-4.js

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ES5Harness.registerTest({

    id: "15.4.4.14-9-b-i-4",

    path: "TestCases/chapter15/15.4/15.4.4/15.4.4.14/15.4.4.14-9-b-i-4.js",

    description: "Array.prototype.indexOf when element to be retrieved is own data property that overrides an inherited data property on an Array-like object",

    test: function testcase() {

        try {
            Object.prototype[0] = false;
            return 0 === Array.prototype.indexOf.call({ 0: true, 1: 1, length: 2 }, true);
        } finally {
            delete Object.prototype[0];
        }
    },

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

});