1 files changed, 30 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Proxy/preventExtensions/return-true-target-is-extensible.js b/js/src/tests/test262/built-ins/Proxy/preventExtensions/return-true-target-is-extensible.js
new file mode 100644
index 0000000000..3e0614d18a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Proxy/preventExtensions/return-true-target-is-extensible.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.5.4
+description: >
+    Throws a TypeError exception if boolean trap result is true and target is
+    extensible.
+info: |
+    [[PreventExtensions]] ( )
+
+    ...
+    10. If booleanTrapResult is true, then
+        ...
+        c. If targetIsExtensible is true, throw a TypeError exception.
+    11. Return booleanTrapResult.
+    ...
+features: [Proxy]
+---*/
+
+var p = new Proxy({}, {
+  preventExtensions: function(t) {
+    return true;
+  }
+});
+
+assert.throws(TypeError, function() {
+  Object.preventExtensions(p);
+});
+
+reportCompare(0, 0);