added a TDDTester for swift 3.0, this is similar to RIVTester except you can add three blocks (given, when, then) to a test instead of just the one
added a TDDTester for swift 3.0, this is similar to RIVTester except you can add three blocks (given, when, then) to a test instead of just the one

Rivukis/PlaygroundTester