1 files changed, 41 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-reg-exp.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-reg-exp.js
new file mode 100644
index 0000000000..dca75da974
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-reg-exp.js
@@ -0,0 +1,41 @@
+// Copyright (c) 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.
+
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat Symbol.isConcatSpreadable reg exp
+includes: [compareArray.js]
+features: [Symbol.isConcatSpreadable]
+---*/
+var re = /abc/;
+// RegExps are not concat-spreadable by default
+assert.compareArray([].concat(re), [re], '[].concat(/abc/) must return [re]');
+
+// RegExps may be individually concat-spreadable
+re[Symbol.isConcatSpreadable] = true;
+re[0] = 1, re[1] = 2, re[2] = 3, re.length = 3;
+assert.compareArray([].concat(re), [1, 2, 3], '[].concat(/abc/) must return [1, 2, 3]');
+
+// RegExps may be concat-spreadable
+RegExp.prototype[Symbol.isConcatSpreadable] = true;
+RegExp.prototype.length = 3;
+
+assert.compareArray([].concat(/abc/), [void 0, void 0, void 0],
+  '[].concat(/abc/) must return [void 0, void 0, void 0]'
+);
+RegExp.prototype[0] = 1;
+RegExp.prototype[1] = 2;
+RegExp.prototype[2] = 3;
+assert.compareArray([].concat(/abc/), [1, 2, 3],
+  '[].concat(/abc/) must return [1, 2, 3]'
+);
+
+delete RegExp.prototype[Symbol.isConcatSpreadable];
+delete RegExp.prototype[0];
+delete RegExp.prototype[1];
+delete RegExp.prototype[2];
+delete RegExp.prototype.length;
+
+reportCompare(0, 0);