How can I write a unit test for a method that has a using statement?
For example let assume that I have a method Foo.
public bool Foo()
{
using (IMyDisposableClass client = new MyDisposableClass())
{
return client.SomeOtherMethod();
}
}
How can I test something like the code above?
Sometimes I choose not to use using statement and Dispose() an object manually. I hope that someone will show me a trick I can use.
Your question doesn't make sense. If you are using TDD, then you should already have a test for what you have written. Requirements, then tests, then design, then development. Either your code passes your tests, or it doesn't.
Now, if your question is how to unit test the above piece of code, then that's another question completely, and I think the other posters have answered it up there.
Sometimes I think there are more buzzwords than developers :)
If you are testing Foo, then you should be looking at the output of Foo, not worrying about the disposal of the class it is using internally.
If you want to test MyDisposableClass' dispose method to see if it is working, that should be a separate unit test built against MyDisposableClass.
You don't need to unit test the using { } block, since that is part of the language. You either trust that it's working, or don't use C#. :) I don't see the need to write a unit test to verify that Dispose() is being called.