1 files changed, 36 insertions, 0 deletions
diff --git a/js/src/tests/non262/extensions/clone-regexp.js b/js/src/tests/non262/extensions/clone-regexp.js
new file mode 100644
index 0000000000..8541dae98c
--- /dev/null
+++ b/js/src/tests/non262/extensions/clone-regexp.js
@@ -0,0 +1,36 @@
+// |reftest| skip-if(!xulRuntime.shell)
+// -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/licenses/publicdomain/
+
+function testRegExp(b, c=b) {
+    var a = deserialize(serialize(b));
+    assertEq(a === b, false);
+    assertEq(Object.getPrototypeOf(a), RegExp.prototype);
+    assertEq(Object.prototype.toString.call(a), "[object RegExp]");
+    for (p in a)
+        throw new Error("cloned RegExp should have no enumerable properties");
+
+    assertEq(a.source, c.source);
+    assertEq(a.global, c.global);
+    assertEq(a.ignoreCase, c.ignoreCase);
+    assertEq(a.multiline, c.multiline);
+    assertEq(a.sticky, c.sticky);
+    assertEq("expando" in a, false);
+}
+
+testRegExp(RegExp(""));
+testRegExp(/(?:)/);
+testRegExp(/^(.*)$/gimy);
+
+var re = /\bx\b/gi;
+re.expando = true;
+testRegExp(re);
+// `source` and the flag accessors are defined on RegExp.prototype, so they're
+// not available after re.__proto__ has been changed. We solve that by passing
+// in an additional copy of the same RegExp to compare the
+// serialized-then-deserialized clone with."
+re.__proto__ = {};
+testRegExp(re, /\bx\b/gi);
+
+reportCompare(0, 0, 'ok');