1 files changed, 28 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/String/prototype/toString/string-object.js b/js/src/tests/test262/built-ins/String/prototype/toString/string-object.js
new file mode 100644
index 0000000000..834a4f41b9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/String/prototype/toString/string-object.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2009 the Sputnik authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.tostring
+description: >
+  If called on a String object, returns [[StringData]] slot
+info: |
+  String.prototype.toString ( )
+
+  1. Return ? thisStringValue(this value).
+
+  thisStringValue ( value )
+
+  [...]
+  2. If Type(value) is Object and value has a [[StringData]] internal slot, then
+    a. Let s be value.[[StringData]].
+    b. Assert: Type(s) is String.
+    c. Return s.
+---*/
+
+var toString = String.prototype.toString;
+
+assert.sameValue(Object('str').toString(), 'str');
+assert.sameValue(toString.call(new String('')), '');
+assert.sameValue('a'.concat(Object('b')), 'ab');
+
+reportCompare(0, 0);