mirror of https://github.com/tc39/test262.git
42 lines
1.3 KiB
JavaScript
42 lines
1.3 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. For configurable properties, step 9c of
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[[DefineOwnProperty]] permits changing the kind of a property.
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es5id: 15.2.3.6-4-15
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description: >
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Object.defineProperty permits changing accessor property to data
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property for configurable properties
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---*/
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var o = {};
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// define an accessor property
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// dummy getter
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var getter = function() {
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return 1;
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}
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var d1 = {
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get: getter,
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configurable: true
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};
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Object.defineProperty(o, "foo", d1);
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// changing "foo" to be a data valued property should succeed, since
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// [[Configurable]] on the original property will be true. Existing
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// values of [[Configurable]] and [[Enumerable]] need to be preserved
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// and the rest need to be set to their default values.
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var desc = {
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value: 101
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};
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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(d2.value, 101, 'd2.value');
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assert.sameValue(d2.writable, false, 'd2.writable');
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assert.sameValue(d2.enumerable, false, 'd2.enumerable');
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assert.sameValue(d2.configurable, true, 'd2.configurable');
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