Regressionstest

Regression testing is a type of software testing that involves verifying the absence of bugs in existing software features after a change has been made to the code. It is designed to ensure that all existing functionality still works as expected and that the recent changes have not introduced any new problems.

Regression testing is typically performed after a code change, such as a bug fix, new feature, or upgrade to an existing version of a library or framework. During this process, a set of automated tests are run against the existing code to verify that it behaves as expected, with the same results as it did previously. This helps to catch any issues that may have been introduced by the recent change.

The main purpose of regression testing is to validate that the recent code change has not caused any unintended side effects, such as breaking existing functionality, altering behavior without warning, or introducing unexpected side effects. By performing regression testing, developers can gain confidence that their code changes are stable and will not cause issues in the production environment.

Regression testing typically involves a combination of unit tests, integration tests, and system tests, which are run against the code to verify its behavior. Automated testing frameworks and tools are often used to perform regression testing, as they can quickly run a large set of tests and provide immediate feedback on the results.

Regression testing plays a critical role in ensuring the quality and stability of software systems, particularly in environments where changes are performed frequently, such as in agile development workflows.