Regression Testing and its types

 Regression testing becomes necessary to ensure that these modifications do not damage your software's current functionality. You will have to regularly upgrade the product to match the current expectations of the users in such a dynamic software field and using the AGILE process. Many hazards associated with software updates can be eliminated through regression testing.

Types of Regression Testing

Unit Regression Testing

Unit testing is a sort of regression testing that should be done during the initial unit testing phase and tests the code as a whole. This type of regression testing takes a very limited approach and focuses on individual lines of code.

Partial Regression Testing

When tiny modifications to existing code are made, partial regression testing is used to check for issues. This procedure guarantees that the system functions properly after the code has been introduced or the desired adjustments have been done.

Complete Regression Testing

This is a comprehensive regression testing strategy that requires QA teams to test each unit with modified code in addition to the original application's features. When several code modifications have been made, this technique is used to test them. It provides a smooth product release or delivery by testing all functionalities.

Corrective Regression Testing

When there are no changes to the product's specifications, this type of testing is used. Furthermore, the current test cases can be easily repurposed to perform the needed test.

Selective Regression Testing

It is carried out to assess the impact of new code being introduced to the software's current code. When this type of regression testing is performed, a subset of the existing test cases is used to limit the amount of labor and money associated with retesting. Selective Regression  example, if there is a change in the program entities such as functions and variables, the test unit is re-run.

Progressive Regression Testing

When certain modifications are made to the program specifications and new test cases are created, this type of regression testing is effective. This testing ensures that no functionalities from the prior version have been compromised in the new and upgraded version