mirror of https://github.com/tc39/test262.git
46 lines
1.2 KiB
JavaScript
46 lines
1.2 KiB
JavaScript
// Copyright (C) 2020 Alexey Shvayka. 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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esid: sec-arguments-exotic-objects-defineownproperty-p-desc
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description: >
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Index stays mapped when redefined with complete descriptor, which differs only
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by the [[Value]] field. Unmapped index is created.
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info: |
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[[DefineOwnProperty]] ( P, Desc )
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[...]
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6. Let allowed be ? OrdinaryDefineOwnProperty(args, P, newArgDesc).
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7. If allowed is false, return false.
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8. If isMapped is true, then
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[...]
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b. Else,
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i. If Desc.[[Value]] is present, then
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1. Let setStatus be Set(map, P, Desc.[[Value]], false).
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2. Assert: setStatus is true because formal parameters mapped by argument objects are always writable.
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9. Return true.
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flags: [noStrict]
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---*/
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(function(a) {
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Object.defineProperty(arguments, "0", {
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value: "foo",
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writable: true,
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enumerable: true,
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configurable: true,
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});
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assert.sameValue(a, "foo");
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assert.sameValue(arguments[0], "foo");
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Object.defineProperty(arguments, "1", {
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value: "bar",
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writable: true,
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enumerable: true,
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configurable: true,
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});
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assert.sameValue(arguments[1], "bar");
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})(0);
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