Often during software testing, some bugs are detected and a quick bug fix is carried out. Regression testing is executed in order to ensure that the bug fix didn’t cause any abruption in the application’s intended functionality. When some bugs are found to be occurring as a result of the bug fix, those are known as regression bugs. For example, let’s say your login page is having some errors and the developer fixed it. Now, the login page is working fine, but the registration page is causing some validation or other errors which did not exist earlier. The new error may have been caused because of the fix on the login page. This is a regression defect and it is relevant to deal with for delivering a more robust product in the market.
Why is it difficult to deal with Regression Defects?
Regression bugs are often unavoidable and need to be fixed before software is released. There are some reasons which make regression bugs a complicated thing to work on.
Increase in Project Cost – Regression defects are produced as a result to recent bug fixes in the production will demand you to perform regression testing for the same module over and over again till the regression defects are discovered. Handling regression defects requires a lot of rework, and both, the organization and the client spends a lot of amount in the employee’s billing, only for repetition of the same work.
Time Complexity – Regression defects can prove to be a lot challenging when the deadline draws closer. Developers get very little time to fix the newly detected bugs and the rush to fix often results in developers applying certain hotfixes which may not be appropriate according to best practices or coding standards.
Agile Velocity Getting Slower – In the current Agile dominated era, developers and testers are always in a rush to finish a sprint and they work hand in hand to resolve the issues. In this scenario, doing repetitive testing of the same module not only consumes time but also becomes frustrating at a point of time when a bug fix results in another new bug. Slowed delivery also becomes a roadblock for software tester to write effective test cases.
Maintenance Cost – In Agile projects, the situation may arise that defects fixed in the current sprint may cause some additional defects in the previous sprint. It has to be taken care that frequent testing is carried out on the previous sprints as well as the part of the application that is already in production, thereby increasing the maintenance cost.
Effective Handling Of Regression Defects
There are several ways that will help you to handle regression defects effectively. Ideally, you can effectively deal with regression defects and ensure a smooth product release by
- Thoroughly reviewing the code.
- Monitoring the test data and other metrics.
- Incorporate Shift-Left testing in your test cycles.
- Automate your regression testing process to make your releases less monotonous, more fast and accurate.
Answer source: Dzone