diff -r 5da8188e392b -r ae47d0499bee commsfwutils/commsbufs/TE_mbufmgr/src/Test07TrimStart.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/commsfwutils/commsbufs/TE_mbufmgr/src/Test07TrimStart.cpp	Mon Sep 06 13:49:23 2010 +0100
@@ -0,0 +1,160 @@
+// Copyright (c) 2002-2009 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:
+// Contains MBufMgr Test Step 07 for TrimStart() method
+// 
+//
+
+// EPOC includes
+#include <e32base.h>
+
+// Test system includes
+//#ifdef SYMBIAN_OLD_EXPORT_LOCATION
+//#include "networking/log.h"
+//#include "networking/teststep.h"
+//#else
+//#include <networking/log.h>
+//#include <networking/teststep.h>
+//#endif
+#include "TestStepCTMbufmgr.h"
+
+#include "Test07TrimStart.h"
+#include <comms-infras/commsbufpond.h>
+// constructor
+CTest07TrimStart::CTest07TrimStart()
+	{
+	SetTestStepName(_L("MBufMgrTest07"));// Store the name of this test case
+	}
+
+// destructor
+CTest07TrimStart::~CTest07TrimStart() 
+	{
+	}
+
+// 
+enum TVerdict CTest07TrimStart::doTestStepL(void)
+	{
+	SetTestStepResult(EFail);
+	//-------------- substep 0 -------------------- 
+	INFO_PRINTF1(_L("  00 Read parameters from the script:"));
+	TInt aOffset;// Will contain the position in chain where split action will be done
+	TInt aLength;// Will contain the length of desc & chains in the test
+	TInt bRet = GetIntFromConfig(_L("MBufMgrTest07"), _L("Length"), aLength);
+	if (!bRet) 
+		{
+         SetTestStepResult(EFail);
+
+		return TestStepResult();
+		}
+	bRet = GetIntFromConfig(_L("MBufMgrTest07"), _L("Offset"), aOffset);
+	if (!bRet) 
+		{
+         SetTestStepResult(EFail);
+
+		return TestStepResult();
+		}
+   	INFO_PRINTF2(_L("     ------- Chain LENGTH              = %d --"), aLength);
+ 	INFO_PRINTF2(_L("     ------- OFFSET where to TrimStart = %d --"), aOffset);
+	if ( (aLength > 1000)    ||(aLength <0) ||
+		 (aOffset > aLength) || (aOffset <0)  )
+		{
+		INFO_PRINTF1(_L("ERROR: Wrong input parameter(s)"));
+         SetTestStepResult(EFail);
+
+		return TestStepResult();
+		}
+
+	//-------------- substep 1 -------------------- 
+	INFO_PRINTF1(_L("  01 Creating CMBufManager and installing active scheduler:"));
+    CleanupStack::PushL( iActSch = new(ELeave) CActiveScheduler );
+	CActiveScheduler::Install(iActSch);
+	CreateInstanceMBufMgrL(KMBufDefaultHeapSize);
+	CleanupClosePushL(iBufPond);
+
+	//-------------- substep 2 -------------------- 
+	INFO_PRINTF1(_L("  02 Allocate two desc. of Length:LENGTH(Des1) & (LENGTH-OFFSET)(Des2):"));
+	TBuf8<1000> *aDes1, *aDes2;
+    CleanupStack::PushL( aDes1 = new(ELeave) TBuf8<1000> );
+    CleanupStack::PushL( aDes2 = new(ELeave) TBuf8<1000> );
+	aDes1->SetLength(aLength);
+	aDes2->SetLength(aLength-aOffset);
+
+	//-------------- substep 3 -------------------- 
+	INFO_PRINTF1(_L("  03 Fill in Des1 with a pattern:"));
+	StripeDes(*aDes1, 0, aLength, '@', 'Z');
+	
+	//-------------- substep 4 -------------------- 
+	INFO_PRINTF1(_L("  04 Fill in Des2 with zeros:"));
+	StripeDes(*aDes2, 0, aLength-aOffset, 0, 0);
+
+	//-------------- substep 5 -------------------- 
+	INFO_PRINTF1(_L("  05 Allocate Chain:"));
+	RMBufChain aChain;
+	TRAPD(ret,aChain.AllocL(aLength));
+	if (ret != KErrNone)
+		{
+		INFO_PRINTF1(_L("Error: Couldn't allocate RMBuf:"));
+		User::Leave(EFail);
+		}
+
+	//-------------- substep 6 -------------------- 
+	INFO_PRINTF1(_L("  06 Copy in Des1 into Chain1:"));
+	aChain.CopyIn(*aDes1);
+
+	//-------------- substep 7 -------------------- 
+	INFO_PRINTF1(_L("  07 TrimStart Chain1 at OFFSET position (actually, remove the 1st OFFSET bytes:"));
+	aChain.TrimStart(aOffset);
+
+	//-------------- substep 8 -------------------- 
+	INFO_PRINTF1(_L("  08 Check the length of the chain. It should be (LENGTH - OFFSET):"));
+	TInt temp;
+	if ( (temp = aChain.Length()) != aLength-aOffset)
+		{
+		INFO_PRINTF3(_L("Error: Chain length is %d instead of %d"), temp, aLength-aOffset);
+		aChain.Free();
+		User::Leave(EFail);
+		}
+
+	//-------------- substep 09 -------------------- 
+	INFO_PRINTF1(_L("  09 Copy the last (LENGTH-OFFSET) bytes of Des1 into the start of Des1:"));
+	(void)Mem::Copy((TUint8 *)aDes1->Ptr(), (TUint8 *)aDes1->Ptr()+aOffset, aLength-aOffset);
+
+	//-------------- substep 10 -------------------- 
+	INFO_PRINTF1(_L("  10 Set the length of Des1 to value LENGTH-OFFSET"));
+	aDes1->SetLength(aLength-aOffset);
+	
+	//-------------- substep 11 -------------------- 
+	INFO_PRINTF1(_L("  11 Copy out Chain into Des2:"));
+	aChain.CopyOut(*aDes2);
+
+	//-------------- substep 12 -------------------- 
+	INFO_PRINTF1(_L("  12 Compare the content of Des1 & Des2:"));
+	if(aDes1->Compare(*aDes2))
+		{
+		aChain.Free();
+		INFO_PRINTF1(_L("Error: The content is not the same"));
+		User::Leave(EFail);
+		}
+
+	//-------------- substep 13 -------------------- 
+	INFO_PRINTF1(_L("  13 Free the chains. Clean up stack:"));
+	aChain.Free();
+    CleanupStack::PopAndDestroy(aDes2);
+    CleanupStack::PopAndDestroy(aDes1);
+    CleanupStack::PopAndDestroy();
+	CActiveScheduler::Install(NULL);
+	CleanupStack::PopAndDestroy(iActSch);
+        SetTestStepResult(EPass);
+
+	return TestStepResult();
+	}