1 files changed, 19 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Object/seal/object-seal-the-extension-of-o-is-prevented-already.js b/js/src/tests/test262/built-ins/Object/seal/object-seal-the-extension-of-o-is-prevented-already.js
new file mode 100644
index 0000000000..1393ff78d5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/seal/object-seal-the-extension-of-o-is-prevented-already.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-setintegritylevel
+description: Object.seal - the extension of 'O' is prevented already
+---*/
+
+var obj = {};
+
+obj.foo = 10; // default value of attributes: writable: true, configurable: true, enumerable: true
+var preCheck = Object.isExtensible(obj);
+Object.preventExtensions(obj);
+Object.seal(obj);
+
+assert(preCheck, 'preCheck !== true');
+assert(Object.isSealed(obj), 'Object.isSealed(obj) !== true');
+
+reportCompare(0, 0);