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+/// Copyright (c) 2011 Microsoft Corporation
+///
+/// Redistribution and use in source and binary forms, with or without modification, are permitted provided
+/// that the following conditions are met:
+/// * Redistributions of source code must retain the above copyright notice, this list of conditions and
+/// the following disclaimer.
+/// * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
+/// the following disclaimer in the documentation and/or other materials provided with the distribution.
+/// * Neither the name of Microsoft nor the names of its contributors may be used to
+/// endorse or promote products derived from this software without specific prior written permission.
+///
+/// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
+/// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+/// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+/// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+/// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+/// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+/// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+/// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+/**
+ * @path ch08/8.12/8.12.5/8.12.5-3-b_1.js
+ * @description Changing the value of a data property should not affect it's non-value property descriptor attributes.
+ */
+
+
+function testcase() {
+ var origReduce = Array.prototype.reduce;
+ var origDesc = Object.getOwnPropertyDescriptor(Array.prototype, "reduce");
+ var newDesc;
+
+ try {
+ Array.prototype.reduce = function () {;};
+ newDesc = Object.getOwnPropertyDescriptor(Array.prototype, "reduce");
+ var descArray = [origDesc, newDesc];
+
+ for (var j in descArray) { //Ensure no attributes are magically added to newDesc
+ for (var i in descArray[j]) {
+ if (i==="value") {
+ if (origDesc[i]===newDesc[i]) {
+ return false;
+ }
+ }
+ else if (origDesc[i]!==newDesc[i]) {
+ return false;
+ }
+ }
+ }
+ return true;
+
+ } finally {
+ Array.prototype.reduce = origReduce;
+ }
+}
+runTestCase(testcase);