1 files changed, 32 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/class/subclass/builtin-objects/String/length.js b/js/src/tests/test262/language/statements/class/subclass/builtin-objects/String/length.js
new file mode 100644
index 0000000000..0d1f33ef7f
--- /dev/null
+++ b/js/src/tests/test262/language/statements/class/subclass/builtin-objects/String/length.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 21.1.4
+description: Instances has the own property length
+info: |
+  21.1.4 Properties of String Instances
+
+  ...
+
+  String instances have a length property, and a set of enumerable properties
+  with integer indexed names.
+includes: [propertyHelper.js]
+---*/
+
+class S extends String {}
+
+var s1 = new S();
+assert.sameValue(s1.length, 0);
+
+verifyNotWritable(s1, 'length');
+verifyNotEnumerable(s1, 'length');
+verifyNotConfigurable(s1, 'length');
+
+var s2 = new S('test262');
+assert.sameValue(s2.length, 7);
+
+verifyNotWritable(s2, 'length');
+verifyNotEnumerable(s2, 'length');
+verifyNotConfigurable(s2, 'length');
+
+reportCompare(0, 0);