How To Start Writing Unit Tests

Unit tests should run quickly and test some in-between logic. In the context of developing a social media application, it's unnecessary to manually navigate a browser, log in, and create a new post just to verify the functionality of a hashtag detection feature. Put that logic in it's own function and unit test it. Then the e2e tests exist, but are slow and run less often, maybe only on a test server when you push your feature branch.

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