1 files changed, 42 insertions, 0 deletions
diff --git a/js/src/tests/e4x/extensions/extensibility.js b/js/src/tests/e4x/extensions/extensibility.js
new file mode 100644
index 0000000..3ac33be
--- /dev/null
+++ b/js/src/tests/e4x/extensions/extensibility.js
@@ -0,0 +1,42 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor:
+ *   Jeff Walden <jwalden+code@mit.edu>
+ */
+
+var gTestfile = 'extensibility.js';
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 492849;
+var summary = 'XML values cannot have their [[Extensible]] property changed';
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+var x = <foo/>;
+
+assertEq(Object.isExtensible(x), true);
+
+try
+{
+  Object.preventExtensions(x);
+  throw new Error("didn't throw");
+}
+catch (e)
+{
+  assertEq(e instanceof TypeError, true,
+           "xmlValue.[[Extensible]] cannot be changed");
+}
+
+assertEq(Object.isExtensible(x), true);
+
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("All tests passed!");