1 files changed, 38 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-function.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-function.js
new file mode 100644
index 0000000000..6f692548b2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-function.js
@@ -0,0 +1,38 @@
+// 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 function
+includes: [compareArray.js]
+features: [Symbol.isConcatSpreadable]
+---*/
+var fn = function(a, b, c) {}
+// Functions are not concat-spreadable by default
+assert.compareArray([fn], [].concat(fn), '[fn] must return the same value returned by [].concat(fn)');
+
+// Functions may be individually concat-spreadable
+fn[Symbol.isConcatSpreadable] = true;
+fn[0] = 1, fn[1] = 2, fn[2] = 3;
+assert.compareArray([1, 2, 3], [].concat(fn), '[1, 2, 3] must return the same value returned by [].concat(fn)');
+
+Function.prototype[Symbol.isConcatSpreadable] = true;
+// Functions may be concat-spreadable
+assert.compareArray([void 0, void 0, void 0], [].concat(function(a, b, c) {}),
+  '[void 0, void 0, void 0] must return the same value returned by [].concat(function(a, b, c) {})'
+);
+Function.prototype[0] = 1;
+Function.prototype[1] = 2;
+Function.prototype[2] = 3;
+assert.compareArray([1, 2, 3], [].concat(function(a, b, c) {}),
+  '[1, 2, 3] must return the same value returned by [].concat(function(a, b, c) {})'
+);
+
+delete Function.prototype[Symbol.isConcatSpreadable];
+delete Function.prototype[0];
+delete Function.prototype[1];
+delete Function.prototype[2];
+
+reportCompare(0, 0);