Chapter 1: Your First Unit Tests
When the iPhone platform was first introduced, applications were small and focused only on one feature. It was easy to make money with an app that only did one thing (for example, a flashlight app that only showed a white screen). The code of these early apps only had a few hundred lines and could easily be tested by tapping the screen for a few minutes.
Since then, the App Store and the available apps have changed a lot. There are still small apps with a clear focus in the App Store, but it's much harder to make money from them. A common app has many features but still needs to be easy to use. There are companies with several developers working on one app full-time. These apps sometimes have a feature set that ...
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