How to Test React.useEffect

So, you've got some code in React.useEffect and you want to know how to test it. This is a pretty common question. The answer is kinda anti-climatic and general. Here's how you think about testing anything: How does the user make that code run? Make your test do that. That's it. That's the secret. The trick is discovering what constitutes a "user." Your React components actually have 2 users: the