Introduce setup and teardown hooks for tests #2
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In order to simplify creation of multiple tests (partially) sharing the same setup procedures, a possibility to hook into the test execution is introduced: Hooks for setting up the test (before the test executes) and tearing down the setup after the test executed.
I've TDDed the changes and thus extended the existing tests. However I didn't spend too much time yet for thinking about refactoring the test code. Still I wanted to float that change over to you as a request for comment, @ennorehling.