28 lines
888 B
JavaScript
28 lines
888 B
JavaScript
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// Copyright 2019 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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function get() {
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// Update the descriptor array now shared between the Foo map and the
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// (Foo + c) map.
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o1.c = 10;
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// Change the type of the field on the new descriptor array in-place to
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// Tagged. If Object.assign has a cached descriptor array, then it will point
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// to the old Foo map's descriptors, which still have .b as Double.
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o2.b = "string";
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return 1;
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}
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function Foo() {
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Object.defineProperty(this, "a", {get, enumerable: true});
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// Initialise Foo.b to have Double representation.
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this.b = 1.5;
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}
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var o1 = new Foo();
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var o2 = new Foo();
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var target = {};
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Object.assign(target, o2);
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// Make sure that target has the right representation after assignment.
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assertEquals(target.b, "string");
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