Added Unit-Tests for Expectations and Fixed dyn-Array Test

I added Unit-Tests for nearly all kind of expectations (except After and Before - here I added failing tests).

I also fixed the AV in the "TestMyMethodDynamicArray"-Method. Don't know if it works in other Delphi-Versions too. In XE6 there was no "privileged instruction". I got an AccessViolation which is "fixed" when using a local variable.