diff -r 000000000000 -r 6474c204b198 xpcom/tests/bug656331_component/TestComponent.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xpcom/tests/bug656331_component/TestComponent.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,31 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/ModuleUtils.h"
+
+// f18fb09b-28b4-4435-bc5b-8027f18df743
+#define NS_TESTING_CID \
+{ 0xf18fb09b, 0x28b4, 0x4435, \
+  { 0xbc, 0x5b, 0x80, 0x27, 0xf1, 0x8d, 0xf7, 0x43 } }
+
+NS_DEFINE_NAMED_CID(NS_TESTING_CID);
+
+static nsresult
+DummyConstructorFunc(nsISupports* aOuter, const nsIID& aIID, void** aResult)
+{
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+static const mozilla::Module::CIDEntry kTestCIDs[] = {
+  { &kNS_TESTING_CID, false, nullptr, DummyConstructorFunc },
+  { nullptr }
+};
+
+static const mozilla::Module kTestModule = {
+  3, /* faking mozilla::Module::kVersion with a value that will never be used */
+  kTestCIDs
+};
+
+NSMODULE_DEFN(dummy) = &kTestModule;