21 lines
698 B
JavaScript
21 lines
698 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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// Flags: --allow-natives-syntax
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var obj = { length: 1, 0: "spread" };
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obj[Symbol.toStringTag] = "foo";
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obj[Symbol.hasInstance] = function() { return true; }
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obj[Symbol.isConcatSpreadable] = true;
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var obj2 = { ...obj };
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// Crash if fast result map bitfield is not set correctly, if verifying heap
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%HeapObjectVerify(obj2);
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// Ensure correct result for some well-known symbols
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assertEquals("[object foo]", Object.prototype.toString.call(obj2));
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assertTrue(Uint8Array instanceof obj2);
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assertEquals(["spread"], [].concat(obj2));
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