What is Unit Testing?
Unit Testing is a fundamental practice in software development, where individual components or units of code are tested in isolation to ensure they function correctly. This type of testing is performed at the smallest scale, focusing on specific functions, methods, or classes within a codebase.
Benefits of Unit Testing:
- Early Bug Detection: Identifying and fixing issues at an early stage before they affect the entire system.
- Code Quality: Ensuring that each unit meets specified requirements and performs as expected.
- Refactoring Confidence: Allowing developers to make changes to the codebase with confidence, knowing that tests will catch any regressions.
Example: In a shopping cart system, unit tests might be written to verify that the “add to cart” function correctly increases the item count, or that the “remove item” function decreases it appropriately.