22 lines
761 B
JavaScript
22 lines
761 B
JavaScript
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// 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 fn = function(a, b, c) {}
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// Functions are not concat-spreadable by default
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assertEquals([fn], [].concat(fn));
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// Functions may be individually concat-spreadable
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fn[Symbol.isConcatSpreadable] = true;
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fn[0] = 1, fn[1] = 2, fn[2] = 3;
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assertEquals([1, 2, 3], [].concat(fn));
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Function.prototype[Symbol.isConcatSpreadable] = true;
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// Functions may be concat-spreadable
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assertEquals([void 0, void 0, void 0], [].concat(function(a,b,c) {}));
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Function.prototype[0] = 1;
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Function.prototype[1] = 2;
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Function.prototype[2] = 3;
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assertEquals([1,2,3], [].concat(function(a, b, c) {}));
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