Web Development with Node.JS and MongoDB (Video 29)

This video tutorial covers the concepts of spies, stubs, and fake timers in testing. It explains how spies can be used to record function calls and verify interactions, while stubs are used to simulate specific behaviors without calling the original function. The tutorial also demonstrates how to use fake timers to speed up tests that involve timing functions. By the end, viewers will understand how to implement these techniques to enhance their testing strategies.

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