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ES5Harness.registerTest({
    id: "11.13.2-31-s",

    path: "TestCases/chapter11/11.13/11.13.2/11.13.2-31-s.js",

    description: "Strict Mode - TypeError is thrown if The LeftHandSide of a Compound Assignment operator(&=) is a reference to a data property with the attribute value {[[Writable]]:false}",

    test: function testcase() {
        "use strict";
        var obj = {};
        Object.defineProperty(obj, "prop", {
            value: 10,
            writable: false,
            enumerable: true,
            configurable: true
        });

        try {
            obj.prop &= 20;
            return false;
        } catch (e) {
            return e instanceof TypeError && obj.prop === 10;
        }
    },

    strict: 1,

    precondition: function prereq() {
        return fnSupportsStrict() && fnExists(Object.defineProperty);
    }
});