LayoutTests/ietestcenter/Javascript/TestCases/15.4.4.15-3-22.js

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ES5Harness.registerTest( {

    id: "15.4.4.15-3-22",

    path: "TestCases/chapter15/15.4/15.4.4/15.4.4.15/15.4.4.15-3-22.js",

    description: "Array.prototype.lastIndexOf throws TypeError exception when 'length' is an object with toString and valueOf methods that don’t return primitive values",
    
    test: function testcase() {

        var toStringAccessed = false;
        var valueOfAccessed = false;

        var obj = {
            1: true,
            length: {
                toString: function () {
                    toStringAccessed = true;
                    return {};
                },

                valueOf: function () {
                    valueOfAccessed = true;
                    return {};
                }
            }
        };

        try {
            Array.prototype.lastIndexOf.call(obj, true);
            return false;
        } catch (e) {
            return toStringAccessed && valueOfAccessed;
        }
    },

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

});