me. The larger your app, the more costly and error-prone manual testing becomes.</p>
<p>Writing tests is also a fun activity, a nice change of pace from delivering features daily, and a way to help you refactor code and improve as a developer. Tests can also serve as a living documentation — a key element in onboarding new developers.</p>
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<h2 id="toc_how-to-run-tests">How to Run Tests <a href="#toc_how-to-run-tests"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512">
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