Great Time in Tech Ed Barcelona

Eli Lopian    .NET Tests    

We had a great time in Barcelona, The TechEd team has done it again and have created a top-notch conference. Apart from not being able to get tickets to the Barcelona Football match, we practically had everything made out for us.

We had some really good talks and met up with great people from the industry. Thank you all.

TypeMock is a Silver Bullet

Eli Lopian    .NET Tests    

During the TechEd in Bacelona, I overheard developers talking about TDD and Mocking. Then I heard one of them say that TypeMock is a Silver Bullet, it can just help you solve all your mocking problems. I love that, thanks guys.

Roys Test Name Convention

Eli Lopian    .NET Tests    

I just loved the way Roy explained how developers normally name their tests without really thinking about them. for example SumNegitiveNumber5 (yup, I have been down that road before) and his naming convention really make sense.

But what I really liked was the template he wrote and how the Tab key browses through the three the different parts of the name.

Rollback for database testing

Eli Lopian    .NET Tests    

Roy Osherove had a good speak in TechEd Barcelona 2007, about using the roll back attribute for database testing, and it works really well, keeping the test case isolated. Except in cases where the production code ignores transactions that are higher up in the hierarchy. This will happen if the TransactionOption is RequiresNew

Roy suggested to always use: Supported, but we believe that there should be a way to test you code even if you require and need to use another transactions.

So here is how I would do it with TypeMock.
I would create a new attribute for the rollback and make sure that all future TransactionOptions are Mocked.

This way our test will look like:

[TestMethod,Rollback,VerifyMocks]
public void MyDatabaseTest()
{
}

Here is the code, to enable this (for any test framework) simple add the attribute.

[AttributeUsage(AttributeTargets.Method)]
public sealed class RollBackAttribute : DecoratorAttribute
{ 
    public override object Execute() 
    { 
        // Start transaction
        ServiceConfig config = new ServiceConfig();
        config.Transaction = TransactionOption.RequiresNew;
        ServiceDomain.Enter(config);
        // make sure that all future Transactions rely on this transaction by mocking all sets to the Transaction
       Mock serviceConfigMock = MockManager.MockAll<ServiceConfig>(Constructor.NotMocked);
       serviceConfigMock.ExpectSetAlways("Transaction");

       try
       {
            // run our tests
           return base.CallDecoratedMethod(); 
        } finally
        { 
            // clear unused mocks
            serviceConfigMock.Clear();

             // rollback database
            if(ContextUtil.IsInTransaction)
            { 
                ContextUtil.SetAbort();
            }
            ServiceDomain.Leave();
        }
   } 
}