LayoutTests/ietestcenter/Javascript/TestCases/15.4.4.15-8-b-i-6.js

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ES5Harness.registerTest({

    id: "15.4.4.15-8-b-i-6",

    path: "TestCases/chapter15/15.4/15.4.4/15.4.4.15/15.4.4.15-8-b-i-6.js",

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

    test: function testcase() {

        try {
            Object.defineProperty(Object.prototype, "0", {
                get: function () {
                    return false;
                },
                configurable: true
            });
            return 0 === Array.prototype.lastIndexOf.call({ 0: true, 1: 1, length: 2 }, true);
        } finally {
            delete Object.prototype[0];
        }
    },

    precondition: function prereq() {
        return fnExists(Array.prototype.lastIndexOf) && fnExists(Object.defineProperty);
    }

});