mirror of https://github.com/tc39/test262.git
45 lines
1.4 KiB
JavaScript
45 lines
1.4 KiB
JavaScript
// Copyright (c) 2012 Ecma International. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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info: |
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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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es5id: 15.2.3.6-4-6
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description: >
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Object.defineProperty is no-op if current and desc are the same
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accessor desc
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---*/
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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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assert.sameValue(sameAccessorDescriptorValues(d1, d2), true, 'sameAccessorDescriptorValues(d1, d2)');
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