Modern JavaScript from the Beginning - Second Edition - What Is Unit Testing?

The video tutorial discusses the importance and controversy of testing in software development, focusing on unit testing. It introduces various types of testing and emphasizes unit testing as a fundamental practice. The tutorial then introduces the Jest framework, highlighting its ease of use and popularity. A simple example of unit testing using Jest is provided, demonstrating how to test a function. The video concludes by outlining the next steps, which involve setting up Jest and writing tests for algorithms.

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