LayoutTests/ietestcenter/Javascript/TestCases/15.4.4.15-5-30.js

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ES5Harness.registerTest({

    id: "15.4.4.15-5-30",

    path: "TestCases/chapter15/15.4/15.4.4/15.4.4.15/15.4.4.15-5-30.js",

    description: "Array.prototype.lastIndexOf - any side-effects in ToPrimitive processing of 'fromIndex' don't occur if step 3 throw an exception",

    test: function testcase() {

        var stepFiveOccurs = false;

        var obj = {};
        Object.defineProperty(obj, "length", {
            get: function () {
                return {
                    valueOf: function () {
                        throw new TypeError();
                        return 20;
                    }
                }
            },
            configurable: true
        });

        var fromIndex = {
            valueOf: function () {
                stepFiveOccurs = true;
                return 0;
            }
        };

        try {
            Array.prototype.lastIndexOf.call(obj, fromIndex);
            return false;
        } catch (e) {
            return (e instanceof TypeError) && !stepFiveOccurs;
        }
    },

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

});