What is Unit Testing?

Unit testing is a crucial process in software development where individual components or modules of an application are tested independently to ensure they perform as expected. It focuses on the smallest units of code, such as functions or methods, verifying their correctness in isolation.

By identifying bugs early in the development cycle, it helps developers maintain code quality and reliability. It simplifies debugging, as issues can be traced back to specific units.

Unit testing, with the help of testing frameworks and automation, gives quick feedback, making it easier to make changes confidently. This helps ensure the application works smoothly when everything is put together.