test262/test/suite/chapter15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-619.js

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/**
 * @path chapter15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-619.js
 * @description ES5 Attributes - all attributes in Array.prototype.reduce are correct
 */


function testcase() {
        var desc = Object.getOwnPropertyDescriptor(Array.prototype, "reduce");

        var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);

        var temp = Array.prototype.reduce;

        try {
            Array.prototype.reduce = "2010";

            var isWritable = (Array.prototype.reduce === "2010");

            var isEnumerable = false;

            for (var prop in Array.prototype) {
                if (prop === "reduce") {
                    isEnumerable = true;
                }
            }

            delete Array.prototype.reduce;

            var isConfigurable = !Array.prototype.hasOwnProperty("reduce");

            return propertyAreCorrect && isWritable && !isEnumerable && isConfigurable;
        } finally {
            Object.defineProperty(Array.prototype, "reduce", {
                value: temp,
                writable: true,
                enumerable: false,
                configurable: true
            });
        }
    }
runTestCase(testcase);