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deps/v8/test/mjsunit/es6/array-concat-spreadable-regexp.js

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+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+"use strict";
+var re = /abc/;
+// RegExps are not concat-spreadable by default
+assertEquals([re], [].concat(re));
+
+// RegExps may be individually concat-spreadable
+re[Symbol.isConcatSpreadable] = true;
+re[0] = 1, re[1] = 2, re[2] = 3, re.length = 3;
+assertEquals([1, 2, 3], [].concat(re));
+
+// RegExps may be concat-spreadable
+RegExp.prototype[Symbol.isConcatSpreadable] = true;
+RegExp.prototype.length = 3;
+
+assertEquals(new Array(3), [].concat(/abc/));
+RegExp.prototype[0] = 1;
+RegExp.prototype[1] = 2;
+RegExp.prototype[2] = 3;
+assertEquals([1,2,3], [].concat(/abc/));