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Regression testing is a kind of software testing practice that is used to test the functionality of software after changes or additions are made to it. It is used to ensure that new code changes have not prompted negative effects within the existing functionalities of the software and that old codes still function after new code changes are introduced. If a software experiences defects or acquires bugs after an alteration of code or introduction of new code, then it can be said that there has been a regression in the functionality of the software.
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Regression testing is an integral element of software development practices. It allows developers and product teams to receive informative feedback and promptly respond to the introduction of bugs and defects in new or altered code. When developers are able to identify bugs at the beginning of the development cycle, they can significantly minimize their costs as well as their maintenance efforts that would be required to address built-up defects later into the development cycle. Hence, without regression testing, it is more tedious, expensive, and time-consuming to investigate the root cause of a defect and the architecture of the software. Frequent testing ensures that the quality of your product, or software, is continually improved.
Even the smallest modification of code can cause a domino effect that creates significant adverse impacts on the functioning of a software. This is why it is so important for developers and testers to execute regression tests even when the smallest alteration is made to existing code.
There are multiple different approaches that can be used to carry out regression testing:
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The following are a few ways in which test cases are chosen for effective regression testing:
Regression testing and re-testing are two concepts that are often confused although they are quite different from one another.
Regression testing is used to ensure that any updates or changes made to software have not introduced bugs or defects that could affect its existing functions. Re-testing, on the other hand, involves conducting ‘re-tests’ for a specific reason such as when a defect in the code has been fixed or when a certain test case fails in the final execution.
The key difference between the two concepts is that regression testing is designed to test for defects that you don’t expect to exist while re-testing is designed to test for bugs that you do expect to exist.
The following are a few challenges to effective regression testing:
Regression testing is a type of software testing practice that is used on software after changes or additions have been made to it, in order to test its functionality.
Even when small changes or additions are made in the coding of a software or a website, it can lead to larger regressions in the functionality of a website. Regression testing allows developers to identify any defects or bugs early in the development cycle so that they can be eliminated.
Regression testing is used to ensure that any updates or changes made to the software have not introduced bugs or defects into its existing functions. Re-testing, on the other hand, involves conducting ‘re-tests’ for a specific reason.