1 files changed, 43 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-number-wrapper.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-number-wrapper.js
new file mode 100644
index 0000000000..08923aa009
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-number-wrapper.js
@@ -0,0 +1,43 @@
+// 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 number wrapper
+includes: [compareArray.js]
+features: [Symbol.isConcatSpreadable]
+---*/
+var num = new Number(true)
+// Number wrapper objects are not concat-spreadable by default
+assert.compareArray([num], [].concat(num), '[num] must return the same value returned by [].concat(num)');
+
+// Number wrapper objects may be individually concat-spreadable
+num[Symbol.isConcatSpreadable] = true;
+num.length = 3;
+num[0] = 1, num[1] = 2, num[2] = 3;
+assert.compareArray([1, 2, 3], [].concat(num), '[1, 2, 3] must return the same value returned by [].concat(num)');
+
+Number.prototype[Symbol.isConcatSpreadable] = true;
+// Number wrapper objects may be concat-spreadable
+assert.compareArray([], [].concat(new Number(123)),
+  '[] must return the same value returned by [].concat(new Number(123))'
+);
+Number.prototype[0] = 1;
+Number.prototype[1] = 2;
+Number.prototype[2] = 3;
+Number.prototype.length = 3;
+assert.compareArray([1, 2, 3], [].concat(new Number(123)),
+  '[1, 2, 3] must return the same value returned by [].concat(new Number(123))'
+);
+
+// Number values are never concat-spreadable
+assert.compareArray([true], [].concat(true), '[true] must return the same value returned by [].concat(true)');
+delete Number.prototype[Symbol.isConcatSpreadable];
+delete Number.prototype[0];
+delete Number.prototype[1];
+delete Number.prototype[2];
+delete Number.prototype.length;
+
+reportCompare(0, 0);