void MainTest()
TestModuleTitle ("ECU DIAGNOSTICS TEST");
TestModuleDescription ("Basic Diagnostics Test");
TestGroupBegin("ECU Extended session", "ReadPartNubmers");
ExtendedDiagnosticSession_Start();
//testcase 
//testcase 
//...
//testcase n
TestGroupEnd();
TestGroupBegin("ECU Identification", "ReadPartNubmers");
ReadSerialPartNumber();
//testcase eg  ReadSerialPartNumber()... 
//testcase 
//...
//testcase 
TestGroupEnd();  
testcase  ReadSerialPartNumber()
diagRequest ABS_ESP.Serial_Number_Read req; //Service from CDD
TestCaseTitle("TEST 1 ReadPartNumber", "Read Serial Part Number");
diagSendRequest(req);
if (TestWaitForDiagResponse(req, 2000)== 1)
  testReportWriteDiagResponse(req);
  if(DiagGetLastResponseCode(req) == -1) // Positive response
    byte DataBuffer[50];
    diagGetRespParameterRaw(req,"SerialNumber",DataBuffer,20);// get data from response
      if(DataBuffer[0] == 0xAA)//dummy response verification
         TestStepPass("Serial Number is correct");
         TestStepFail("Wrong Part number ");
  else if(DiagGetLastResponseCode(req) > 0)//Negative response 
    TestStepFail("Negative response received");
  TestStepFail("No answer from ECU!");
testcase ExtendedDiagnosticSession_Start()
  diagRequest ABS_ESP.ExtendedDiagnosticSession_Start req; //Service from CDD, 
 TestCaseTitle("Test no 1", "Set Extended session");
diagSendRequest(req);
if (TestWaitForDiagResponse(req, 2000)== 1)
  testReportWriteDiagResponse(req);
  if(DiagGetLastResponseCode(req) == -1) // Positive response
   TestStepPass("Positive");
  else if(DiagGetLastResponseCode(req) > 0)//Negative response 
    TestStepFail("ExtendedDiagnosticSession","Negative response received");