1 files changed, 26 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Object/internals/DefineOwnProperty/consistent-writable-regexp-dollar1.js b/js/src/tests/test262/built-ins/Object/internals/DefineOwnProperty/consistent-writable-regexp-dollar1.js
new file mode 100644
index 0000000000..374c4a48df
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/internals/DefineOwnProperty/consistent-writable-regexp-dollar1.js
@@ -0,0 +1,26 @@
+// Copyright (C) 2017 Claude Pache. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-invariants-of-the-essential-internal-methods
+description: >
+  A property made non-writable, non-configurable must not be reported as writable
+  ("$1" property of the RegExp built-in)
+info: |
+  [[GetOwnProperty]] (P)
+  [...]
+  - If the [[Writable]] attribute may change from false to true,
+    then the [[Configurable]] attribute must be true..
+  [...]
+  (This invariant was violated for the specific property under test by at least
+  one implementation as of January 2017.)
+---*/
+
+if (Reflect.defineProperty(RegExp, '$1', {
+    writable: false,
+    configurable: false
+  })) {
+  var desc = Reflect.getOwnPropertyDescriptor(RegExp, '$1');
+  assert.sameValue(desc.writable, false);
+}
+
+reportCompare(0, 0);