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Mockito Made Clear »

Mockito is the most popular framework in the Java world for automating unit testing with dependencies. Learn the Mockito API and how and when to use stubs, mocks, and spies. On a deeper level, discover why the framework does what it does and how it can simplify unit testing in Java. You'll gain insights into the Mockito API, save time when unit testing, and have confidence in your Java programs. Read on for a special deal!

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Mockito Made Clear
January 24, 2023

Mockito Made Clear: Java Unit Testing with Mocks, Stubs, and Spies

If you've only ever run a few JUnit tests or injected stubs into classes to return preset values, it's time to level up your Java toolbox. Dependencies on other classes and external resources can obscure issues and make bugs hard to detect. You need to test classes in isolation to truly pinpoint your problems. And while you could write dummy classes to replace dependencies yourself, Mockito automates the process and helps you fix your code faster.

Start with the Mockito API to generate fake classes for dependencies, configure how each should respond when their methods are called, and verify that the class under test interacts with dependencies the way you'd expect. Next, build unit tests with the Mockito framework and feel confident not just that methods are called, but that they are called the correct number of times and in the correct order. Along the way, follow clear test examples based on JUnit 5 to create stubs, mocks, and spies and find the source of any problems lurking in Java classes.

Save time, write better code, and have more confidence in your Java programs with Mockito.

The completed ebook is now available on our site and will be available soon on Amazon.com, O'Reilly Learning Platform, and other online retailers. Use Coupon Code "MOCKITOCOMPLETE" for 40% off the completed ebook at pragprog.com/titles/mockito.

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