Writing Maintainable Unit Tests
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Writing Maintainable Unit Tests

Mastering the art of loosely coupled unit tests

About the Book

Are unit tests causing you pain? Are they constantly failing whenever you make changes to your production code? Do you spend a lot of time fixing them when they break? Are they difficult to set up and run? Do you have a hard time maintaining or structuring your unit test code? Are they causing you headaches from time to time? Are you ready to give up on writing unit tests or have you already done so?

Or do you just want to step up your game and want to learn more about how to write readable and maintainable unit tests?         

This book is for software developers who want to improve upon their existing skills for writing unit tests. You will learn how to build loosely coupled, highly maintainable and robust unit tests that are trustworthy and improve the overall code quality of your software applications. The content of this book is based on 15+ years of experience with Test-Driven Development.

Although the examples in this book are written in C#, the principles and guidance are broadly applicable to other platforms and programming environments as well. So you will be able to universally apply this knowledge throughout the rest of your career.

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About the Author

Jan Van Ryswyck
Jan Van Ryswyck

I’m a professional software developer since Y2K. A blogger since Y2K+5. Author of written words. Provider of training and coaching in XP practices. Curator of the Awesome Talks list. Past organizer of the European Virtual ALT.NET meetings. Thinking and learning about all kinds of technologies since forever.

Software development is one of my great passions in life. My goal as a software craftsman is to provide simple and qualitative solutions to complex business problems. In order to accomplish this, I'm continuously deepening my existing skills and expertise while learning new skills and broadening my horizons. Sharing my knowledge and experiences with other people is another one of my lifetime goals.

Table of Contents

  • Chapter 1: Types of Automated Tests
    • Introduction
    • But Why?
    • A Taxonomy of Tests
    • Solitary and Sociable Tests
    • The Test Pyramid
    • State and Behaviour Verification
    • Test-Driven Development
    • Summary
  • Chapter 2: Maintainable Solitary Tests
    • Introduction
    • Clean Solitary Tests
    • The DRY Principle
    • The Single-Responsibility Principle (SRP)
    • The DAMP Principle
    • Other Characteristics Of Maintainable Solitary Tests
    • Summary
  • Chapter 3: The Anatomy of Solitary Tests
    • Introduction
    • Arrange, Act, Assert
    • AAA Per Test Method
    • Single Assert Per Test
    • Avoid SetUp / TearDown
    • AAA Per Test Class
    • Assert Last Principle
    • Naming Unit Tests
    • Summary
  • Chapter 4: Decoupling Patterns
  • Chapter 5: Assertions and Observations

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