Chapter 2. Writing Testable Code with Functional Programming
There are three main aspects of writing code in a functional style in F# versus imperative style in a language such as C#:
- No side effects leads to fewer bugs
- Smaller isolated units are easier to test
- Expressiveness makes code right the first time
This chapter will address the following bits about functional programming:
- Purity
- Expressiveness
- Immutability
- Patterns to help you write testable code
By reading this chapter, you will learn how to write high quality code that will become easy to test. This chapter sets the groundwork for how tests will be written in the following chapters.
