BeginTimer and EndTimer Not Working In Data-Driven Unit Test Using DataSource Attribute

Question

Using VS2012 Ultimate I have a unit test with the <DataSource> attribute which passes in values from a CSV file.  I'm wrapping the unit test in a load test.  I expect a Transaction to appear in the load test results for each row in my DataSource
due to the BeginTimer and EndTimer methods in the unit test.  However, I only get 1 transaction, with response time roughly equal to the overall test time.  For example, if each row in the DataSource takes 1 second to process, then my test time and
transaction time would be about 10 seconds with 10 rows in the CSV file.
I've created a load test with Constant Load Pattern, 1 user, and 1 test iteration.  Seeing the behavior described above.
I have tried with and without and the check for $LoadTestUserContext.  I'm only using that because I get a NotSupportedException when running the unit test on its own.  I can't believe this bug still
exists, but that is another topic.
Note also that I cannot see the Debug output in the Output window in VS2012.
Any tips?  Thank you.
    <TestMethod()>
    <DataSource("Microsoft.VisualStudio.TestTools.DataSource.CSV", "|DataDirectory|\TestData\MyValues.csv", "MyValues#csv", DataAccessMethod.Sequential)>
    Public Sub WebServiceTest()
        Dim service As MySvc = New MySvcClient()
        Dim input As MyInput = New MySvcInput()
        input.A = testContextInstance.DataRow("A")
        input.B = testContextInstance.DataRow("B")
        Dim g As Guid = Guid.NewGuid()
        If TestContext.Properties.Contains("$LoadTestUserContext") Then 'running as load test
            TestContext.BeginTimer("MySvcTrans")
            Debug.WriteLine("Begin Transaction MySvcTrans:  {0}", g)
        End If
        Dim output As MySvcOutput = service.Method(input)
        If TestContext.Properties.Contains("$LoadTestUserContext") Then 'running as load test
            Debug.WriteLine("End Transaction MySvcTrans:  {0}", g)
            TestContext.EndTimer("MySvcTrans")
        End If
        Assert.AreEqual(0, output.ReturnCode)
    End Sub

Answer 1

Hi John,
>> I expect a Transaction to appear in the load test results for each row in my DataSource due to the BeginTimer and EndTimer methods in the unit test.  However, I only get 1 transaction, with response time roughly equal to the overall test
time.
Could you share me a screen shot about the reslut in load test?
Could you share us the load test result in "Transaction"Tables?
About how to use the
Transaction for unit tests, maybe you could get useful informaiton here:
http://blogs.msdn.com/b/slumley/archive/2006/04/14/load-testing-web-services-with-unit-tests.aspx
Best Regards,
Jack
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