Regression testing is a software testing technique that re-runs functional and non-functional tests to ensure that a software application works as intended after any code changes, updates, revisions, improvements, or optimizations. Its purpose is to maintain the overall stability of the software application by keeping a check on the functionality of the existing features, detecting unexpected faults that may arise due to tweaks, enhancements, or extending the existing codebase.
To perform regression testing effectively, follow these steps:
Keep in mind the common challenges in regression testing:
Measure the effectiveness of regression testing by:
There are several types of regression testing, each with its own advantages and use cases. Some common types include:
Adopting best practices for regression testing ensures the software's stability and functionality. Begin by identifying changes in the source code and prioritizing them based on product requirements. Select test cases to re-run, considering test scenarios to determine execution time. Categorize automated and manual test cases, prioritize them, and schedule their execution.
Focus on highly used functionalities and regularly reassess developers' and users' needs to update test designs. Implement a regression framework from the beginning of the project and add new tests when new functionality is introduced. Automate regression testing in an agile development cycle to identify regression bugs quickly. Incorporate feedback from regression testing, update test cases based on changes in requirements, and foster collaboration between development and testing teams. Finally, use metrics to measure regression testing success and make data-driven decisions for future test runs.
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