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What is Unit Testing? Best Practices to Do it Right
Unit testing is a software testing method that verifies the smallest parts of code (units such as functions, methods, or classes) in isolation to ensure they behave as intended, catching defects early in development and improving stability, reliability, and code quality. It’s usually done during the development phase and can be automated with test frameworks so that tests run frequently, providing quick feedback before integration with larger systems. Good unit testing supports maintainability, helps developers refactor confidently, and serves as documentation for expected behavior. Best practices include identifying clear test cases, isolating units with mocks/stubs, automating tests, integrating them into CI/CD, and using consistent naming so defects are easy to track and fix.
