[fw-mvc] How to start a test?

I read the guide reference about testing,  and I think it's different from usual unit test, it is integrated into the frame, isn't it?

If I just want to test a class, but it refers to database, how can I do it?

Does the test classes zf provides need to start the application?

And I prefet to use simpletest framework, can it be deployed well?

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