Testing individual components of software for correctness.

Unit testing focuses on validating individual components or functions of software to ensure they work as intended. Typically performed by developers using frameworks like JUnit or Jest, it catches bugs early in the development cycle, improving code quality and maintainability.

• Catches bugs early in development.
• Improves code quality and maintainability.
• Supports agile and TDD workflows.
• Fast and targeted for individual components.
• Reduces downstream defects.