LayoutTests/ietestcenter/Javascript/TestCases/15.4.4.15-5-6.js

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ES5Harness.registerTest({

    id: "15.4.4.15-5-6",

    path: "TestCases/chapter15/15.4/15.4.4/15.4.4.15/15.4.4.15-5-6.js",

    description: "Array.prototype.lastlastIndexOf when 'fromIndex' isn’t passed",

    test: function testcase() {
        var arr = [0, 1, 2, 3, 4];
        //'fromIndex' will be set as 4 if not passed by default
        return arr.lastIndexOf(0) === arr.lastIndexOf(0, 4) &&
            arr.lastIndexOf(2) === arr.lastIndexOf(2, 4) &&
            arr.lastIndexOf(4) === arr.lastIndexOf(4, 4);
    },

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

});