Refactor tests

- [Instructor] Now, if you're an experienced programmer,…you'll be yelling at the screen now,…because, of course, I haven't done anything to make sure…that we actually got four elements in that array.…So if we send in things that don't parse into four elements,…we're definitely going to have errors.…But we're going to cover that in more tests.…Okay so we can go ahead and delete that comment.…We need to do a bit of refactoring already.…Because this test is a bit specific,…it only really works for one string.…In theory, I could have hard-wired the values…for these and simply returned those exact dates…and that test would have passed.…

And in a very strict TDD view of the world,…that's what I would have done.…So let's assume that I'm being a bit strict…and I'm going to send some other values through.…We're going to need to do some refactoring.…Let's exploit Nunit's way of producing test cases,…which is with the TestFixture attribute.…And we can move that whole string to there.…Which means this will need to take one argument.…