Chapter 2. Testing Concepts

There are a number of ways and methods to test software quality. TDD is focused on testing the small pieces of code using unit tests. Unit tests play a big and important role in TDD irrespective of the programming language. While learning TDD, it is essential to understand unit testing and testing frameworks. In the previous chapter, you learned about the life cycle of TDD. Now with examples, we will see how each step of the life cycle is executed. For this chapter, we will try to showcase examples using YUI (short for Yahoo User Interface) because of its simplicity and easy-to-understand functions.

In this chapter, you will learn about unit testing, a little about frameworks, how a test is written, actions, and assertions in unit tests. In this chapter, you will learn the following:

• Unit testing
• Following the process
• Benefits and pitfalls