mirror of https://github.com/tc39/test262.git
66 lines
2.9 KiB
JavaScript
66 lines
2.9 KiB
JavaScript
/// Copyright (c) 2009 Microsoft Corporation
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///
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/// Redistribution and use in source and binary forms, with or without modification, are permitted provided
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/// that the following conditions are met:
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/// * Redistributions of source code must retain the above copyright notice, this list of conditions and
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/// the following disclaimer.
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/// * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
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/// the following disclaimer in the documentation and/or other materials provided with the distribution.
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/// * Neither the name of Microsoft nor the names of its contributors may be used to
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/// endorse or promote products derived from this software without specific prior written permission.
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///
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/// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
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/// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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/// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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/// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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/// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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/// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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/// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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/// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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/**
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* Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
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* of O to define the property. Step 6 of [[DefineOwnProperty]] returns if
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* every field of desc also occurs in current and every field in desc has
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* the same value as current.
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*
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* @path chapter15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-6.js
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* @description Object.defineProperty is no-op if current and desc are the same accessor desc
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*/
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function testcase() {
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function sameAccessorDescriptorValues(d1, d2) {
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return (d1.get == d2.get &&
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d1.enumerable == d2.enumerable &&
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d1.configurable == d2.configurable);
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}
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var o = {};
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// create an accessor property with the following attributes:
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// enumerable: true, configurable: true
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var desc = {
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get: function () {},
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enumerable: true,
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configurable: true
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};
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Object.defineProperty(o, "foo", desc);
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// query for, and save, the desc. A subsequent call to defineProperty
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// with the same desc should not disturb the property definition.
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var d1 = Object.getOwnPropertyDescriptor(o, "foo");
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// now, redefine the property with the same descriptor
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// the property defintion should not get disturbed.
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Object.defineProperty(o, "foo", desc);
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var d2 = Object.getOwnPropertyDescriptor(o, "foo");
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if (sameAccessorDescriptorValues(d1, d2) === true) {
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return true;
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}
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}
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runTestCase(testcase);
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