1 files changed, 25 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Object/preventExtensions/throws-when-false.js b/js/src/tests/test262/built-ins/Object/preventExtensions/throws-when-false.js
new file mode 100644
index 0000000000..f77a15f63c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/preventExtensions/throws-when-false.js
@@ -0,0 +1,25 @@
+// Copyright (C) 2019 Ecma International. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-object.preventextensions
+description: >
+  Object.preventExtensions throws if O.[[PreventExtensions]]() returns false.
+info: |
+  Object.preventExtensions ( O )
+  ...
+  2. Let status be ? O.[[PreventExtensions]]().
+  3. If status is false, throw a TypeError exception.
+---*/
+
+const p = new Proxy({}, {
+  preventExtensions() {
+    return false;
+  },
+});
+
+assert.throws(TypeError, () => {
+  Object.preventExtensions(p);
+});
+
+reportCompare(0, 0);