NUnit - cleanup after test failure

Question

We have some NUnit tests that access the database. When one of them fails it can leave database in inconsistent state - which is not an issue, since we rebuild database for

Answer 1

Another option is to have a special function that will throw your exceptions, that sets a switch in the testfixture that says an exception occured.

public abstract class CleanOnErrorFixture
{
     protected bool threwException = false;

     protected void ThrowException(Exception someException)
     {
         threwException = true;
         throw someException;
     }

     protected bool HasTestFailed()
     {
          if(threwException)
          {
               threwException = false; //So that this is reset after each teardown
               return true;
          }
          return false;
     }
}

Then using your example:

[TestFixture]
public class SomeFixture : CleanOnErrorFixture
{
    [Test]
    public void MyFailTest()
    {
        ThrowException(new InvalidOperationException());
    }

    [Test]
    public void MySuccessTest()
    {
        Assert.That(true, Is.True);
    }

    [TearDown]
    public void CleanUpOnError()
    {
        if (HasLastTestFailed()) CleanUpDatabase();
    }
}

The only issue here is that the Stack trace will lead to the CleanOnErrorFixture