Testing is a crucial aspect of software development, ensuring reliability, performance, and security. It identifies bugs early, validates requirements, and improves user satisfaction. Types of testing include Unit Testing (validating individual code units), Integration Testing (checking module interactions), System Testing (whole system verification), and Acceptance Testing (ensuring business needs). Performance, Security, and Usability Testing optimize efficiency, secure systems, and enhance user experience. Automated testing suits repetitive tasks, while manual testing is ideal for UI and exploratory testing. Best practices include adopting TDD, CI/CD integration, clear test documentation, prioritizing testing areas, using code coverage tools, and regular test reviews. Effective testing saves time, reduces costs, and ensures high-quality software.
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