What Are the Regression Testing Techniques
                     What Are the Regression Testing 
Techniques?
The kind of software testing method that is performed after the implementing new features or modifying of 
the existing functionality is called regression testing. 
Its purpose is to make sure that all changes to the code do not evoke any side effects and interrupt the exact 
operation of the whole system and its components.
Regression testing services are also done after certain flaws have been corrected. It is done for checking that 
the problems have been fully removed. Besides that, the process of flaw fixing should not affect anyhow the 
existing functionalities.
To effectively perform the process of the software product after any corrections or modifications, the many 
techniques can be implemented.
• Prioritization of test cases
• Test selection
• Retest all
The process of retesting all designed test cases in the suite is rather cost-intensive and time-consuming as it 
needs much hard work and resources. If the deadline is coming, then this technique will not effect.
Automated Regression For Faster Turnaround: Teams required to make sure an effective balance between quality and 
speed, which means they require faster and credible feedback. Especially in an agile environment, it is essential that the 
   f e e  d back comes in faster, so that the essential action is needed. 
No Tolerance For Flaws: There is minimal or no scope for errors during constant releases in an agile set-up. Each code 
issued in production requires to perform and give results as required and improve the user experience. 
With regression tests, the software is made resistant to flaws even in the longer run, dedicating testing teams to release 
faster with quality assurance. At every level of release, the application/software is tested for defects and bugs, adopting a 
zero-tolerance policy towards flaws.
Adding New Functionalities:
Businesses require to innovate and try new methods to 
improve the user experience. 
This means that during an application development procedure, 
there has to be full scope of introducing new functionalities 
and testing them for useful integration with the other features 
of the application.
Regression tests normally are initiated when a programmer 
fixes flaws or adds codes for new functions for the system. 
There can be a lot of dependence on recently added and 
existing functionality. To make sure quality, it is necessary to 
check that the new code works together with the old code and 
the unmodified code is not changed.
Often, regression testing is done through various phases of 
testing. 
It is for this purpose, that there are various types of 
regression testing services. Some have been discussed below:
Complete Regression – Complete regression testing is usually carried out when the code changes for 
modification or the software features seep way back into the roots. It is also taken out in case there are many 
changes to the present code. 
It provides a complete view of the system as a whole and weeds out any unforeseen issues. A sort of a “final” 
regression testing is executed to verify that the build (new lines of code) has not been modified for a period of 
time. This final version is then deployed to end-users.
Partial Regression – Partial regression is done after collision analysis. In this testing procedure, the new 
addition of the code as a unit is made to associate with other parts of the older code, in order to manage that 
even with code modification, the system functions in silos as desired.
Unit Regression – Unit regression testing, done during the unit testing phase, tests the code as a single 
unit. It has a small and focused approach.
Below Are Some Examples That Necessitate 
Regression Testing?
* Correction of errors relating to logic and control 
flow 
* Computational errors 
* Interface errors
Automate manual testing tools are important aids 
when the programmer requires improving the 
return on the testing expense he has conducted. 
Once these programs have been utilized wisely, 
then the software test automation will just follow 
through. 
Although it is most important to be aware that the 
software test automation along with the 
regression testing may fail and result from too 
expensive setbacks when recognized, the test can 
just run easily.