Testing is a crucial skill for developers, helping catch bugs early and make code more reliable.
Benefits of testing include catching bugs early, easier code maintenance, confidence in adding new features, and aiding others in understanding your code.
Types of testing every developer should know include manual testing (quick checks, UI testing), and automated testing (unit tests, integration tests, end-to-end tests).
Tips for writing good tests: start small with unit tests, test edge cases, keep tests fast and independent, use descriptive test names, run tests often, and embrace testing as a mindset.