1 files changed, 53 insertions, 0 deletions
diff --git a/js/src/tests/non262/extensions/__proto__.js b/js/src/tests/non262/extensions/__proto__.js
new file mode 100644
index 0000000000..aa6d608766
--- /dev/null
+++ b/js/src/tests/non262/extensions/__proto__.js
@@ -0,0 +1,53 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+var gTestfile = '__proto__.js';
+var BUGNUMBER = 770344;
+var summary = "__proto__ as accessor";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+var protoDesc = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__");
+assertEq(protoDesc !== null, true);
+assertEq(typeof protoDesc, "object");
+assertEq(protoDesc.hasOwnProperty("get"), true);
+assertEq(protoDesc.hasOwnProperty("set"), true);
+assertEq(protoDesc.hasOwnProperty("enumerable"), true);
+assertEq(protoDesc.hasOwnProperty("configurable"), true);
+assertEq(protoDesc.hasOwnProperty("value"), false);
+assertEq(protoDesc.hasOwnProperty("writable"), false);
+
+assertEq(protoDesc.configurable, true);
+assertEq(protoDesc.enumerable, false);
+assertEq(typeof protoDesc.get, "function", protoDesc.get + "");
+assertEq(typeof protoDesc.set, "function", protoDesc.set + "");
+
+assertEq(delete Object.prototype.__proto__, true);
+assertEq(Object.getOwnPropertyDescriptor(Object.prototype, "__proto__"),
+         undefined);
+
+var obj = {};
+obj.__proto__ = 5;
+assertEq(Object.getPrototypeOf(obj), Object.prototype);
+assertEq(obj.hasOwnProperty("__proto__"), true);
+
+var desc = Object.getOwnPropertyDescriptor(obj, "__proto__");
+assertEq(desc !== null, true);
+assertEq(typeof desc, "object");
+assertEq(desc.value, 5);
+assertEq(desc.writable, true);
+assertEq(desc.enumerable, true);
+assertEq(desc.configurable, true);
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");