TDD View Controllers Part 2

We continue our TDD exercise, building a view controller one test at a time using Specta and OCMock. This time we introduce the alert view behavior for invalid logins, performing a segue for valid logins, and capturing arguments passed to mocks in order to affect the system, all in tests.

This is a companion discussion topic for the original entry at https://nsscreencast.com/episodes/083-tdd-view-controllers-part-2