Unit testing checks if a specific part of the software works correctly. It is done early in the development process to catch and fix problems, which saves a lot of money later. Methods used in unit testing include checking the limits of input values, ensuring all possible paths and decisions in the code are tested, and making sure every line of code is executed.

Component testing involves checking different parts of software separately to find any problems. It is done on a section of the code after it is finished. While it is similar to unit testing, the key difference is that component testing also checks if these parts work well together when combined with other parts.

System testing, also known as end-to-end testing, checks if the software meets all the functional and business requirements. It helps find performance, functionality, or compatibility problems, which can make the software delivery process faster.

Understand how well your software is liked by the users. After system testing, this black-box testing method checks if your software meets the users’ needs and requirements. This helps your application get accepted quickly by users, boosting its early and overall growth.

Sometimes, fixing bugs or adding new features can break parts of the software that were working before. Regression testing checks that these changes don’t cause new problems.

Smoke testing, named after checking electronic equipment, is used to see if the new code is stable enough for more tests. This test focuses only on the main and most important functions.