Regressiontestejä

Regressiontestejä, or regression testing in English, is a type of software testing that verifies previously developed and tested software still performs correctly after a change, such as a new feature addition, bug fix, or configuration update. The primary goal of regression testing is to ensure that these modifications have not introduced new defects or adversely affected existing functionality.

This process involves re-running a subset of already executed test cases. These test cases are selected based on their relevance to the recent changes and their potential to uncover regressions. The selection criteria can include areas of the software that are frequently modified, critical functionalities, or parts of the code that have historically been prone to defects.

Regression testing can be performed manually, but it is often automated to increase efficiency and repeatability. Automated regression tests are particularly valuable in agile development environments where changes are frequent and rapid. The automation allows for quick feedback on the impact of code modifications.

The benefits of regression testing are numerous. It helps maintain software quality over time, reduces the risk of releasing faulty software, and can improve developer confidence in their code. By systematically checking for unintended consequences, regression testing plays a crucial role in the overall software development lifecycle, ensuring stability and reliability as the software evolves.