Javadoc
Runs the test suite with class name 'testClassName' and returns the results of executing each test
contained in the suite. This Runner should run the suite in the calling (current) thread.
'fingerprint' indicates how the test suite was identified as a test suite. This method may be called with the
same value for 'testClassName' but different fingerprints. For example, if both a class and its companion object
were tests, this method would be called with the same name but with a different value for 'fingerprint.isModule'.