MSTest, when does [ClassCleanup] invocation happen when having test classes inheritance

Question

I have hierarchy of functional tests like this

[TestClass]
class BaseClass
{
// specific methods and members relevant to all functional tests are here
// ie how to work with db
}

[TestClass]
class Module1:BaseClass
{
        [ClassInitialize]
        public static void Module1TestsInit(TestContext context)
        {
             //create some db data here, which is needed only for Module1
        }
        [ClassCleanup]
        public static void Module1TestsCleanup()
        {
            //delete Module1 db data
        }
}

[TestClass]
class Module2:BaseClass
{
        [ClassInitialize]
        public static void Module2TestsInit(TestContext context)
        {
             //create some db data here, which is needed only for Module2
        }
        [ClassCleanup]
        public static void Module2TestsCleanup()
        {
            //delete Module2 db data
        }
}

When the tests are executed I am expecting that [ClassCleanup] will run when all methods from Module1 are completed and then again when Module2 tests are finished. I have many classes like Module1 with the same base class.

However, all ClassCleanup methods do run only when ALL tests from all modules completes. That is not convenient since I have some conflicting data in the different modules and want to clean up each class results when this class tests finished.

Any thoughts?

Answer 1

I figured it has nothing to do with inheritance.

http://blogs.msdn.com/b/ploeh/archive/2007/01/06/classcleanupmayrunlaterthanyouthink.aspx

That's just the way MSTest works.

Edit: Original link dead, Way back machine link here