JUnit Tutorial for Unit Testing

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Java Code Geeks

12 min read · Apr 15, 2026

JUnit Tutorial for Unit Testing

Delve into the world of Unit Testing with this compact guide that introduces you to JUnit! A unit can be a function, a class, a package, or a subsystem. So, the term unit testing refers to the practice of testing such small units of your code, so as to ensure that they work as expected. For example, we can test whether an output is what we expected to see given some inputs or if a condition is true or false. The most popular testing framework in Java is JUnit and we have provided plenty of JUnit tutorials. Now, we decided to gather all the JUnit features in one detailed guide for your convenience. We hope you like it! With this free eBook you will also receive weekly news, tips and special offers delivered to your inbox courtesy of Java Code Geeks.

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