Regression testing is a type of software testing used to measure the quality of changes in the new version of the software. It is also known as re-testing or retesting. This type of testing is performed in order to check whether any new software updates have caused any functionality regressions or bugs that were not present in the older versions.
The article starts by providing an overview of what regression testing is, its types, benefits, and challenges. The article’s conclusion reiterates some points touched upon earlier, such as how it helps prevent customer frustration and troubleshooting problems, while also providing invaluable insights into how customers are using new features.
Types of Regression Testing
Regression testing is the process of checking that new code does not break old code. It provides a way to check that changes to an application or system do not break older functionality. The types of regression testing are selective, progressive, complete, and reset-all.
- Selective regression testing only verifies whether certain parts of the software work as they did before.
- Progressive regression testing verifies whether the software’s features still work after changes have been made.
- Complete regression testing checks all possible scenarios in order to verify that nothing has changed with the application or system.
- Reset-all tests are done after any updates have been made in order to restore everything to its original state, which is what happens when you reboot your computer after installing an update for example.
Top 5 Benefits of Regression Testing
Regression testing is done to check for bugs in the newly developed code or system. It is one of the most important tests that need to be done before releasing the software application.
Regression testing helps in bringing out bugs, which are usually missed because other tests are not designed to find them. Thus, regression testing provides a more complete look at the product’s quality and ensures that no errors are introduced while updating older features. And all this is possible with the right web automation tools.
- Regression Testing Helps in Finding Bugs
- Helps Improve Code Quality
- Allows Developers to Maintain Existing Features
- Reduces Unnecessary Development Efforts
- Provides a More Complete Look at Product Quality
When to Apply Regression Testing?
There are two types of errors that can occur during regression testing, one is the type of error that occurs if the changes made to code should not have made any difference to the output. The other type of error is an error that is due to a change. Regression testing should be done on every change so that any new errors created by the changes can be detected and dealt with.
Challenges of Regression Testing
Testing is a process to ensure that the product is meeting the requirements. Regression testing is a type of software testing done after changes are made to ensure that any new changes didn’t break anything.
- The first challenge of regression testing is time. The time taken for the regression tests depends on various factors like the complexity of the project, number of modules, number of dependencies, etc.
- The second challenge is scope creep. Scope creep refers to adding more features or fixing other bugs during development which can lead to enormous time and cost overruns in case if they are not accounted for in the initial plan and budget
- The third challenge with regression testing is sustaining an adequate level of test coverage over time which gets difficult with high code churn rates and long release cycles
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