1 files changed, 49 insertions, 0 deletions
diff --git a/js/src/tests/non262/extensions/preventExtensions-cross-global.js b/js/src/tests/non262/extensions/preventExtensions-cross-global.js
new file mode 100644
index 0000000000..0cc68e0fb4
--- /dev/null
+++ b/js/src/tests/non262/extensions/preventExtensions-cross-global.js
@@ -0,0 +1,49 @@
+// |reftest| skip-if(!xulRuntime.shell) -- needs newGlobal()
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor:
+ *   Jeff Walden <jwalden+code@mit.edu>
+ */
+
+var gTestfile = 'preventExtensions-cross-global.js';
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 789897;
+var summary =
+  "Object.preventExtensions and Object.isExtensible should work correctly " +
+  "across globals";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+var otherGlobal = newGlobal();
+
+var obj = {};
+assertEq(otherGlobal.Object.isExtensible(obj), true);
+assertEq(otherGlobal.Object.preventExtensions(obj), obj);
+assertEq(otherGlobal.Object.isExtensible(obj), false);
+
+var objFromOther = otherGlobal.Object();
+assertEq(Object.isExtensible(objFromOther), true);
+assertEq(Object.preventExtensions(objFromOther), objFromOther);
+assertEq(Object.isExtensible(objFromOther), false);
+
+var proxy = new Proxy({}, {});
+assertEq(otherGlobal.Object.isExtensible(proxy), true);
+assertEq(otherGlobal.Object.preventExtensions(proxy), proxy);
+assertEq(otherGlobal.Object.isExtensible(proxy), false);
+
+var proxyFromOther = otherGlobal.evaluate("new Proxy({}, {})");
+assertEq(Object.isExtensible(proxyFromOther), true);
+assertEq(Object.preventExtensions(proxyFromOther), proxyFromOther);
+assertEq(Object.isExtensible(proxyFromOther), false);
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");