27 lines
862 B
JavaScript
27 lines
862 B
JavaScript
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// Copyright 2018 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 testMegamorphicWithDontEnumTransition() {
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function spread(o) { return { ...o }; }
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// Set up transition tree
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let obj = { ...{}, a: 0, b: 1, c: 2, };
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Object.defineProperty(obj, "boom", { enumerable: false, configurable: true,
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writable: true });
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// make CloneObjectIC MEGAMORPHIC
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spread(new Proxy({}, {}));
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// Ensure we don't crash, and create the correct object
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let result = spread({ a: 0, b: 1, c: 2, boom: 3 });
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assertEquals({ a: 0, b: 1, c: 2, boom: 3 }, result);
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assertEquals({
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enumerable: true,
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writable: true,
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configurable: true,
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value: 3,
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}, Object.getOwnPropertyDescriptor(result, "boom"));
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})();
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