#12 Rewrite tests so they use class name indirectly

Originally at 2015-02-22T16:17:31Z by Herbert Vojčík closed at 2015-02-24T11:41:54Z Rewriting all test so they do not use `Domite` directly but for example as `self testedClass` would be great. The suite could then be subclassed and use to test https://github.com/herby/silk.