LayoutTests/ietestcenter/Javascript/TestCases/15.4.4.14-3-19.js

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ES5Harness.registerTest({

    id: "15.4.4.14-3-19",

    path: "TestCases/chapter15/15.4/15.4.4/15.4.4.14/15.4.4.14-3-19.js",

    description: "Array.prototype.indexOf when value of 'length' is an Object which has an own toString method.",

    test: function testcase() {

        // objects inherit the default valueOf() method from Object
        // that simply returns itself. Since the default valueOf() method
        // does not return a primitive value, ES next tries to convert the object
        // to a number by calling its toString() method and converting the
        // resulting string to a number.

        var obj = {
            1: true,
            2: 2,

            length: {
                toString: function () {
                    return '2';
                }
            }
        };

        return Array.prototype.indexOf.call(obj, true) === 1 &&
            Array.prototype.indexOf.call(obj, 2) === -1;
    },

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

});