diff -r 000000000000 -r dfb7c4ff071f datacommsserver/esockserver/test/te_mecunittest/src/mectest004step.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/datacommsserver/esockserver/test/te_mecunittest/src/mectest004step.cpp	Thu Dec 17 09:22:25 2009 +0200
@@ -0,0 +1,68 @@
+// Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+//
+// mectest004step.cpp
+//
+
+/**
+@file
+*/
+
+#include "mectest004step.h"
+#include "testextensions.h"
+#include <comms-infras/ss_rmetaextensioncontainer.h>
+#include <comms-infras/ss_commsprov.h>
+
+using namespace ESock;
+
+CMecTest004Step::~CMecTest004Step()
+    {
+    }
+
+
+/**
+//! @SYMTestCaseDesc 	Simple API Test, AppendExtension() where extension has already been added
+//! @SYMFssID 			COMMS-INFRAS/Esock/MetaExtensionContainer/UnitTest
+//! @SYMTestActions 	1) Open container
+//						2) AppendExtension T1 to container
+//						3) AppendExtension T1 == KErrAlreadyExists
+//						4) Close
+//! @SYMTestExpectedResults  KErrNone.
+*/
+TVerdict CMecTest004Step::RunTestStepL()
+    {
+    TVerdict result = EFail;
+    
+    RMetaExtensionContainer mec;
+    mec.Open();
+    CleanupClosePushL(mec);
+    
+    CreateAndAppendExtensionL(mec, TTestExtension1::ETypeId, KExtVersion1);
+    
+    TTestExtension1* ext = new(ELeave)TTestExtension1(KExtVersion2);
+    TInt err = mec.AppendExtension(ext);
+    if (err == KErrAlreadyExists)
+    	{
+    	delete ext;
+    	result = EPass;
+    	}
+    else if (err != KErrNone)
+    	{
+    	delete ext;
+    	}
+    
+    CleanupStack::PopAndDestroy(&mec);
+    return result;
+    }
+