adding forward declaration test

js/src/xpconnect/idl/xpctest.idl

@@ -1,7 +1,27 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.0 (the "NPL"); you may not use this file except in
+ * compliance with the NPL.  You may obtain a copy of the NPL at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the NPL is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
+ * for the specific language governing rights and limitations under the
+ * NPL.
+ *
+ * The Initial Developer of this code under the NPL is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 1999 Netscape Communications Corporation.  All Rights
+ * Reserved.
+ */
 
 #include "nsISupports.idl"
 #include "xpcexception.idl"
 
+// forward declaration (to test that such things work)
+interface nsITestXPCSomeUselessThing;
+
 [scriptable, uuid(159E36D0-991E-11d2-AC3F-00C09300144B)]
 interface nsITestXPCFoo : nsISupports {
     long Test(in long p1, in long p2);
@@ -80,6 +100,8 @@ interface nsIEcho : nsISupports {
 
     nsIJSStackFrameLocation GetStack();
     void SetReceiverReturnOldReceiver(inout nsIEcho aReceiver);
+
+    void MethodWithForwardDeclaredParam(in nsITestXPCSomeUselessThing sut);
 };
 
 /***************************************************************************/

js/src/xpconnect/tests/TestXPC.cpp

@@ -274,6 +274,9 @@ public:
     /* void SetReceiverReturnOldReceiver (inout nsIEcho aReceiver); */
     NS_IMETHOD SetReceiverReturnOldReceiver(nsIEcho **aReceiver);
 
+    /* void MethodWithForwardDeclaredParam (in nsITestXPCSomeUselessThing sut); */
+    NS_IMETHOD MethodWithForwardDeclaredParam(nsITestXPCSomeUselessThing *sut);
+
     MyEcho();
 private:
     nsIEcho* mReceiver;
@@ -512,6 +515,13 @@ MyEcho::SetReceiverReturnOldReceiver(nsIEcho **aReceiver)
     return NS_OK;
 }
 
+/* void MethodWithForwardDeclaredParam (in nsITestXPCSomeUselessThing sut); */
+NS_IMETHODIMP
+MyEcho::MethodWithForwardDeclaredParam(nsITestXPCSomeUselessThing *sut)
+{
+    return NS_OK;
+}
+
 /***************************************************************************/
 // security manager test class
 

js/src/xpconnect/tests/components/xpctest_echo.cpp

@@ -99,6 +99,9 @@ public:
     /* void SetReceiverReturnOldReceiver (inout nsIEcho aReceiver); */
     NS_IMETHOD SetReceiverReturnOldReceiver(nsIEcho **aReceiver);
 
+    /* void MethodWithForwardDeclaredParam (in nsITestXPCSomeUselessThing sut); */
+    NS_IMETHOD MethodWithForwardDeclaredParam(nsITestXPCSomeUselessThing *sut);
+
     xpctestEcho();
 private:
     nsIEcho* mReceiver;
@@ -335,6 +338,13 @@ xpctestEcho::SetReceiverReturnOldReceiver(nsIEcho **aReceiver)
     return NS_OK;
 }
 
+/* void MethodWithForwardDeclaredParam (in nsITestXPCSomeUselessThing sut); */
+NS_IMETHODIMP
+xpctestEcho::MethodWithForwardDeclaredParam(nsITestXPCSomeUselessThing *sut)
+{
+    return NS_OK;
+}
+
 /***************************************************************************/
 
 // static

js/src/xpconnect/tests/testxpc.js

@@ -468,6 +468,15 @@ print("inout of interface tests - "+
         (all_ok ? "passed" : "failed"));
 echo.SetReceiver(null);
 
+/***************************************************************************/
+
+try {
+    echo.MethodWithForwardDeclaredParam(new Object());
+    print("method with forward declared param test  -  passed");
+} catch(e) {
+    print("method with forward declared param test  -  failed");
+}    
+
 /***************************************************************************/
 // Components object test...
 // print(".......................................");