1 files changed, 38 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/class/subclass/builtin-objects/Array/length.js b/js/src/tests/test262/language/statements/class/subclass/builtin-objects/Array/length.js
new file mode 100644
index 0000000000..e19bc322a6
--- /dev/null
+++ b/js/src/tests/test262/language/statements/class/subclass/builtin-objects/Array/length.js
@@ -0,0 +1,38 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.4.1
+description: >
+  Instances has the own property length
+info: |
+  22.1.4.1 length
+
+  The length property of an Array instance is a data property whose value is
+  always numerically greater than the name of every configurable own property
+  whose name is an array index.
+
+  The length property initially has the attributes { [[Writable]]: true,
+  [[Enumerable]]: false, [[Configurable]]: false }.
+---*/
+
+class Ar extends Array {}
+
+var arr = new Ar('foo', 'bar');
+
+assert.sameValue(arr[0], 'foo');
+assert.sameValue(arr[1], 'bar');
+
+var arrDesc = Object.getOwnPropertyDescriptor(arr, 'length');
+
+assert.sameValue(arrDesc.writable, true);
+assert.sameValue(arrDesc.enumerable, false);
+assert.sameValue(arrDesc.configurable, false);
+
+assert.sameValue(arr[1], 'bar');
+
+arr.length = 1;
+
+assert.sameValue(arr[0], 'foo');
+assert.sameValue(arr[1], undefined);
+
+reportCompare(0, 0);