41903f2af6
Split up the test so each test runs in a fresh Isolate with pristine protector state. Note that testArrayConcatES5 was not split out because it is a duplicate of mjsunit/array-concat.js, and testConcatRevokedProxy has already been split out as mjsunit/es6/array-concat-revocable-revoked-proxy-[12].js. Bug: v8:9837 Change-Id: I8f744b0263c82f1dae61a55032124d9129f8e6f3 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1864007 Reviewed-by: Jakob Kummerow <jkummerow@chromium.org> Commit-Queue: Shu-yu Guo <syg@chromium.org> Cr-Commit-Position: refs/heads/master@{#64366}
22 lines
846 B
JavaScript
22 lines
846 B
JavaScript
// Copyright 2014 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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"use strict";
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var str1 = new String("yuck\uD83D\uDCA9")
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// String wrapper objects are not concat-spreadable by default
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assertEquals([str1], [].concat(str1));
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// String wrapper objects may be individually concat-spreadable
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str1[Symbol.isConcatSpreadable] = true;
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assertEquals(["y", "u", "c", "k", "\uD83D", "\uDCA9"],
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[].concat(str1));
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String.prototype[Symbol.isConcatSpreadable] = true;
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// String wrapper objects may be concat-spreadable
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assertEquals(["y", "u", "c", "k", "\uD83D", "\uDCA9"],
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[].concat(new String("yuck\uD83D\uDCA9")));
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// String values are never concat-spreadable
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assertEquals(["yuck\uD83D\uDCA9"], [].concat("yuck\uD83D\uDCA9"));
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