Which practice automatically tests code changes before they are merged into the main branch?

The concept of Continuous Integration is centered around the practice of automatically testing code changes as they are made, prior to their merging into the main branch of a codebase. This approach ensures that any integration issues are identified and resolved early in the development process, minimizing disruption to the overall workflow.

In Continuous Integration, developers frequently commit code changes to a shared repository. Each commit triggers an automated build and testing process, which evaluates the new code against pre-defined tests. This helps to verify that the changes do not introduce new bugs or break existing functionality. By catching issues early and often, teams can maintain a stable codebase and enhance collaboration among team members.

This practice enhances software quality and streamlines the development lifecycle, leading to faster release cycles and more reliable software. It is a fundamental aspect of modern development methodologies, particularly in agile environments, where rapid development and iteration are paramount.