How to write output in the [ClassInitialize()] of a Unit Test class?

Question

I am writing some unit tests for the persistence layer of my C#.NET application. Before and after the tests of a test class execute, I want to do some cleaning up to

Answer 1

The [ClassInitialize] and [ClassCleanup] run just once for all the tests in that class. You'd be better of using [TestInitialize] and [TestCleanUp] which run before and after each test. Also try wrapping the complete test in a database transaction. This way you can simply rollback the operation (by not committing the transaction) and your database stays in a consistent state (which is essential for trustworthy automated tests).

A trick I do for integration tests is to define a base class that all my integration test classes can inherit from. The base class ensures that each test is ran in a transaction and that this transaction is rolled back. Here is the code:

public abstract class IntegrationTestBase
{
    private TransactionScope scope;

    [TestInitialize]
    public void TestInitialize()
    {
        scope = new TransactionScope();
    }

    [TestCleanup]
    public void TestCleanup()
    {
        scope.Dispose();
    }
}

Good luck.