ID#234: added Unit Test in preparation of Request/Response refactoring.
ID#234: added Unit Test in preparation of Request/Response refactoring (part II).
ID#234: added Unit Test in preparation of Request/Response refactoring (part III).
ID#234: added Unit Test in preparation of Request/Response refactoring (part IV).
ID#234: added Unit Test in preparation of Request/Response refactoring (part V).