The Art of Unit Testing, Third Edition: with examples in JavaScript 3rd ed. Edition 272100

Thousands of developers have learned to hone their code quality under the tutelage of The Art of Unit Testing. This revised third edition updates an international bestseller to reflect modern development tools and practices, as well as to cover JavaScript.

Effective unit tests streamline your software development process and ensure you deliver consistent high-quality code every time. With practical examples in JavaScript and Node, this hands-on guide takes you from your very first unit tests all the way to comprehensive test suites, naming standards, and refactoring techniques. You’ll explore test patterns and organization, working with legacy code and even “untestable” code. The many tool-agnostic examples are presented in JavaScript and carefully designed so that they apply to code written in any language.

Purchase of the print book includes a free eBook in PDF, Kindle, and ePub formats from Manning Publications.

The art of unit testing is more than just learning the right collection of tools and practices. It’s about understanding what makes great tests tick, finding the right strategy for each unique situation, and knowing what to do when the testing process gets messy. This book delivers insights and advice that will transform the way you test your software.

The Art of Unit Testing, Third Edition shows you how to create readable and maintainable tests. It goes well beyond basic test creation into organization-wide test strategies, troubleshooting, working with legacy code, and “merciless” refactoring. You’ll love the practical examples and familiar scenarios that make testing come alive as you read. This third edition has been updated with techniques specific to object-oriented, functional, and modular coding styles. The examples use JavaScript.

Examples use JavaScript, TypeScript, and Node.js.

1 The basics of unit testing

2 A first unit test

3 Breaking dependencies with stubs

4 Interaction testing using mock objects

5 Isolation frameworks

6 Unit testing asynchronous code

7 Trustworthy tests

8 Maintainability

9 Readability

10 Developing a testing strategy

11 Integrating unit testing into the organization

12 Working with legacy code

Appendix Monkey-patching functions and modules