LayoutTests/ietestcenter/Javascript/TestCases/15.4.4.15-8-a-2.js

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ES5Harness.registerTest({

    id: "15.4.4.15-8-a-2",

    path: "TestCases/chapter15/15.4/15.4.4/15.4.4.15/15.4.4.15-8-a-2.js",

    description: "Array.prototype.lastIndexOf - test that added properties of step 5 are visible here on an Array-like object",

    test: function testcase() {

        var arr = { length: 30 };
        var targetObj = function () { };

        var fromIndex = {
            valueOf: function () {
                arr[4] = targetObj;
                return 10;
            }
        };
        
        return 4 === Array.prototype.lastIndexOf.call(arr, targetObj, fromIndex);
    },

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

});