S01E23: [TDD ๐Ÿ… 20] Finishing the Quiz implementation!

In this episode, we finish the SubmitButtonController implementation and test-drive the ResultsViewController factory.

Trouble reverted! We fix the crash in the SubmitButtonController and then refactor the tests.

Furthermore, we quickly test-drive the ResultsViewController factory implementation and update the diagrams to reflect the changes. We notice itโ€™s time to move the Question type to the Engine module since itโ€™s now being used by more than one module.

Andโ€ฆ weโ€™re done!

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