Learn Java Unit Testing with JUnit 5 in 20 Steps - Step 04 - First Unit Test with JUnit - String length() method

The video tutorial introduces unit testing, emphasizing that the absence of failure indicates success. It explains how to write effective assertions to verify method outputs. The tutorial guides viewers through creating a basic unit test using JUnit, focusing on comparing expected and actual outputs. It highlights the importance of continuous integration in testing and provides an exercise to write unit tests for Math class methods.

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