The Complete guide on Regression testing with its types and Examples


The technological world is growing at a very fast pace and is breaking records. Companies are turning to many different technologies to be adopted beneficially for the software or the product. Customers’ standards are increasing daily and meeting their choices and preferences, and it has become very important for companies to incorporate various types of testing methods. One such method is regression testing, which ensures that previously developed and tested software still performs even after changes have been made. Regression testing has been booming as it evaluates the functionality of the programming codes and manages a systemwide test that is intended to fix and create problem-free software.

What is Regression Testing? 

Regression testing is defined as a testing method where existing software applications are retested after additional changes have been made in the already existing functionality of the software. It is a software method used to verify any modifications in the software based on its overall working functionality, especially when a code change is made. Changes in the codes or programming ensure that the software and its features remain unaffected by the coding procedure, and in such cases, regression testing works efficiently. The main motive of regression testing is to ensure that the code programs adapted to modify and bring changes in the application do not negatively affect the software’s working. 

Need of Regression Testing 

Changes are inevitable and sometimes very necessary. The importance of regression testing arises when software is either improved, modified or changed in any manner to determine whether the modified code affects the application or not. 

  • It helps in the evaluation of the functionality of the new programming codes. 
  • It helps in re-executing test cases that have been cleared in the past against the new versions to check it’s working. 
  • Ensures that new codes do not interrupt the existing features. 
  • At its core, it deals with code, design or anything at all that determines the framework of the application. 
  • Remove any kinds of bugs or defects of the software update implementation.

How does regression testing is performed? 

Regression testing is no easy task for the testers, as it involves several steps that must be followed in a well-defined manner. It is a process in which debugging the code is important and covers modified and affected parts of the code. 

  • Tip – Regression testing in an qa testing services company can be performed either manually or automation. However, an automation regression test is the best practice and the best choice of any organization to save time and cost. Several steps that follow are –
  • Retest all – It is a very simple method executed at the very beginning to ensure that the software maintenance includes enhancement error correction optimization and deletion of existing features. 
  • Regression Test Selection – Regression test is a selection is a procedure that forms as an integral method. It involves choosing the new functionality, changes in the existing functionalities, and new integration processes. Here the companies have to determine which component or software needs the attention and needs regression testing. Test cases are selected based on the modified code and categorized into reusable and absolute test cases. 

Test Case Prioritization 

Developers have to take a very important decision when it comes to selecting the test cases. Decision making is very important as they have to decide high priority first component runs instead of medium-low priority wise. It means that they have to test cases on a priority basis to have a business impact, balanced frequency and criticality. Text selection based on priority will help businesses in a great man and the regression test suite. 

Types/Examples –

Regression testing explores different functionalities of the application by the test scenarios or regression suite. It helps define the unique approach towards testing, figure out the test cases, and select the right regression pasting tool by running the test with automation. 

  1. Unit regression is one of the most important regression testing phases that is complex and important. It deals with the coding processes as a single unit without any dependencies. It is a pivotal part of the unit testing as a test specifically on various factors such as recurring defects to check the criticality of certain features. The aim is to deliver a useful unit of code that adds value and enhances the application by maintaining the artefacts. 
  2. Partial regression testing – It is a process that does the entire part of verifying the codes. It helps to determine the working of the codes and to check whether the changes have been done in the code, keeping in mind the existing features. The unit is integrated with and changed or existing codes where companies need to ultimately drive at the desired result. 
  3. Complete regression testing is done when a change in the code is done on several set modules, which is the major changes cropping up in your test codes. It is specifically used when there is a major change in the route code that can impact other modules. The whole production process is regressed to check if there are any changes to help in combating unexpected issues before handing the application to the final users. 

Concluding thoughts 

At Hike QA, we are a software testing service provider company where you will find software test engineers that work towards improving the quality of the application and enhancing the user experiences. All types of regression testing are performed in a procedural form making the pipeline fruitful. Therefore, any expense, mitigation, and processing are well structured and defined, and a dynamic team speeds up the process.

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