mirror of https://github.com/tc39/test262.git
56 lines
2.6 KiB
JavaScript
56 lines
2.6 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. For non-configurable properties, step 11.a.ii
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* of [[DefineOwnProperty]] permits setting a getter if absent.
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*
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* @path chapter15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-21.js
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* @description Object.defineProperty permits setting a getter (if absent) of non-configurable accessor properties(8.12.9 step 11.a.ii)
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*/
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function testcase() {
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var o = {};
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// create an accessor property; all other attributes default to false.
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// dummy setter
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var setter = function (x) {}
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var d1 = { set: setter };
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Object.defineProperty(o, "foo", d1);
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// now, trying to set the getter should succeed even though [[Configurable]]
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// on the original property will be false. Existing values of need to be preserved.
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var getter = undefined;
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var desc = { get: getter };
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Object.defineProperty(o, "foo", desc);
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var d2 = Object.getOwnPropertyDescriptor(o, "foo");
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if (d2.get === getter &&
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d2.set === setter &&
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d2.configurable === false &&
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d2.enumerable === false) {
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return true;
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}
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}
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runTestCase(testcase);
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