mirror of https://github.com/tc39/test262.git
40 lines
1.2 KiB
JavaScript
40 lines
1.2 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 9b of
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[[DefineOwnProperty]] permits changing the kind of a property.
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es5id: 15.2.3.6-4-14
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description: >
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Object.defineProperty permits changing data property to accessor
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property for configurable properties
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---*/
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var o = {};
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// create a data property. In this case,
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// [[Enumerable]] and [[Configurable]] are true
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o["foo"] = 101;
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// changing "foo" to be an accessor should succeed, since [[Configurable]]
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// on the original property will be true. Existing values of [[Configurable]]
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// and [[Enumerable]] need to be preserved and the rest need to be set to
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// their default values
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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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};
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Object.defineProperty(o, "foo", d1);
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var d2 = Object.getOwnPropertyDescriptor(o, "foo");
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assert.sameValue(d2.get, getter, 'd2.get');
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assert.sameValue(d2.enumerable, true, 'd2.enumerable');
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assert.sameValue(d2.configurable, true, 'd2.configurable');
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