Summary
In this chapter, we touched on basic unit testing-related topics, and we went through several examples.
If I was to categorize unit testing experience from 1 to 5, with level 1 being a beginner and 5 being an expert, this chapter should get you to level 2. Fear not! After going through the rest of the book, where more realistic examples will come, you will be at level 4, so I am glad you have made it so far. Keep going!
Is this book going to take me to level 5? I hear you asking. Well, unit testing is not a sprint, it is a marathon; it takes years of practice to get to that level, and only getting your hands dirty in unit testing will get you there.
We also covered the relationship between SOLID principles and unit testing to show you the big picture and how everything fits nicely together.
In this chapter, I have deliberately avoided examples that require a deep understanding of test doubles, so as to introduce you to unit testing in a gentle way. However, in reality...
