A Study Of Effective Regression Testing In Practice

Selenium supports automated test scripts that cycle through data sets and data-driven tests. This is a proper solution for large-scale quality assurance teams with advanced testers. However, its steep learning curve becomes a hindrance for small and mid-size teams.

how to select regression test cases

For this purpose, testers need input from developers about the scope and nature of the product. Agile methodology has short sprints, and it goes on, it is highly required automating the test suite executed over again and again within a short period. Automating the execution of test cases reduces the overall testing time and defect slippage. This regression is performed on new features or enhancement made in the latest Sprint. Testers should select test cases from the test suite based on new added functionalities or enhancements. You should update the regression pack A regression pack is the set of test cases that are performed when updates to a software build are complete. In this blog, our main focus of discussion is Regression Testing.

Regression Testing In Agile

Considering the previous regression test cycle experience and learnings, we can select test cases that resulted in generating frequent defects. Prioritization assists the team to resolve most critical defects at an early stage of a testing cycle. There are multiple ways in which regression testing can be carried out. With the addition of any new piece of code to the software, the ‘as is’ functionality of the product should not be hampered by any means. The scope of this testing keeps increasing with the addition of new functionalities and changes in the code. Regression testing forms an important phase of STLC but brings along several challenges for the testers. In such a dynamic software field and heaving AGILE methodology; you will have to constantly upgrade your product to meet the latest demands of the users.

It can significantly reduce the testing cost in the long run if applied correctly. It is one of its kind testing approach that aims to build confidence in software going through rapid changes without unintended side-effects. So if we try to define it in a bit more mathematical way, we can say, regression test selection comprises selecting a subset T’ of the actual test suite T.

Top 3 Regression Testing Types & How To Execute Them

The large is the no. of features in a product, more is the no. of test cases needed for regression. It improves the quality of the product under test and has following benefits over traditional methods. These selection techniques provide a very controlled environment for identifying the faults in a given program.

how to select regression test cases

The purpose of regression testing in this case is to verify that recent changes haven’t destroyed or hindered the functional features already in place. In certain cases, automation may help detect bugs that weren’t found by manual regression testing. When we tested the image-processing app described above, automation helped detect several random bugs thanks to automated testing timeouts. If a script didn’t fit in the timeout, it was automatically marked as failed. As a result, the same script was run again and again until it passed, and random bugs did appear at a certain point. Manual regression testing proves to be efficient at the early stages of the product delivery process. For a product we worked on, an iOS image processing app, manual regression testing helped detect several bugs hampering the app UX.

Why Is Codeless Test Automation Better Than Conventional Test Automation?

As a result, you need to choose the test cases wisely, regularly monitor the test suite and perform periodic cleanup for removing obsolete or unnecessary test cases from the regression test suite. As new features and changes are implemented in the software product, more test cases are added to the regression test suite. As the product functionalities expands, testers are overwhelmed by the regression test cases and they fall victim to lose the track of test cases, overlooking the important test cases. This can be prevented by regularly monitoring the regression test suite and deleting the obsolete test cases.

Regression testing is change-oriented while retesting is not based on changes. You should focus more on highly trafficked paths that are used most often for your software build.

How To Perform Regression Testing?

Here, the product is tested as the whole instead of individual units. They both allow regression and retesting of manual or automated test cases. It is generally performed on the new build and fixes bugs too if anything is detected. intelligent Device Automation AI based product automates hire react native developer integration of latest out-of-the-box devices. If it will benefit the app, your team, or the organization, go ahead. Your goal should always be fast feedback, precision, and better overall results. However, don’t forget that Selenium requires deep knowledge when it comes to script writing.

It supports desktop, web, and mobile apps and can be used for GUI testing. After you have decided that the duration and scope of a project are worth the upfront effort needed to set up automation, look for key features in an automation tool that meet the project requirements. If it’s a defect to cover in regression, then do check its history to identify how to select regression test cases and track the regression testing efforts. By adding more actions in the sequence, you can increase the probability of finding a serious bug. If any of the actions stumbles from the chain, then the entire functionality could collapse. And that’s why we are advocating such complex test cases to become the part of the regression testing suite.

What is the difference between smoke and regression testing?

Smoke testing checks if the software build is stable and can be used by the QA team for further testing. Regression testing checks for any small changes in the code and whether any other existing functionalities are affected due to the newly developed code.

The testers might fail to test the most critical functionality of the application deriving bugs into production. Whenever there is a new business requirement and the existing code is modified as per the requirement. In this article, let’s discuss the approach in prioritizing the test cases for regression testing and how to select regression test cases its importance in the test life cycle. Recalling the above discussion–“How to choose test cases”, prepare a test suit for your regression testing. Choosing the most apt test cases in regression testing is very important. Make sure you include the test cases that have previously found bugs and defects in code.

Tips To Optimize Regression Test Suites

By evaluation, we imply the time required to complete the automation process or to do the test manually. If you are not ready to invest time in the automation process, i.e. if the process itself would take more time than manual testing, common sense says that the automation is not worth it.

how to select regression test cases

And you can then conduct your regression tests for that particular code. Though a full regression test is desirable, but it does take a lot of time. And when you are short of time, it is suggested to do an impact analysis of the changes. Mostly conducted in isolation, mainly focused on code unit and all the dependencies and interactions are will be blocked at the time of test. It is done to analyze the impact of new code added to the already existing code of the software. This type of testing is not at all advisable when there is a small change, that has been introduced in the existing product. Conducting this type of testing is known as regression testing.

The great thing about automation is that, when done right, it can free up testers’ time and let them work on test design and improvement. The purpose is to detect any unwanted changes to ensure that the tested software still performs as desired after a change.

It is a technique for solving the issues left out while in the software development phase. “Regression testing” can be a time consuming and lengthy process as it involves implementation of test cases for the whole program repeatedly unless we are sure that the software product is error free. A technique adopted to validate the unmodified portions of a software product ensuring that no new bugs have arrived and that they remain intact and unaffected is known as regression testing. By selecting a subset of existing test cases, a QA specialist can cut the operating costs tremendously compared to retesting the entire system. There are several practices testers use to select a case of regression test sessions. To start with, you can only test a suite that yields coverage to the modified section of the original program. Another popular approach is a Safe Technique where a tester works with the number of cases that expose one or multiple faults in the modified program.

It is necessary to check either new code complies the older ones so that the unmodified code is not affected. Mostly, the testing team has the task to check last-minute changes in the system. Here, it is necessary to complete the testing process on time by covering all major system aspects. To prioritize test cases depending on a business impact, critical and frequency used functionalists. The selection of test cases based on priority will significantly reduce the regression test suite. Regression Testing is a process to make changes to an older program and also ensure that the old program still working even after making changes to a program. It is a normal part of software development in larger companies, performed by code specialists.

  • It is also important to avoid any duplication of test cases, else they will add to the unnecessary effort and frustration for testers.
  • Regression testing should be performed to find bugs in a new software release and ensures the previous bugs are fixed.
  • Regression testing is needed whenever there is software enhancement, error correction, modification and deletion of existing features.
  • Regression testing can be executed within a partial or full selection of previously completed test cases .
  • Naturally, as a software developer, you want to be able to update that software while maintaining its existing features.
  • Even if you did no major code changes, it’s still wise to run a regression testing session in case a performance defect has been recorded.

The Kanban approach consists of using a product dashboard that helps to clearly visualize work and track progress and improvements. This way, every team member can estimate their workload, relate it to the team work, set deadlines and ensure efficiency. In waterfall, Kanban helps estimate the time needed for stabilization and plan testing efforts more carefully. In Agile, the Kanban dashboard helps select test cases for iteration regression and critical points for full regression.

A test case that fails for a reason unrelated to the functionality of the application is termed as ‘failed test case’. As some areas in an application are more prone to errors, they usually fail even after making a small code change. To test the complexity efficiently, testers should use different methods and techniques to ensure software quality. Testers have to make sure that all complex test cases are included in the regression testing suite. In this article, we discussed about prioritization of test cases for regression testing to save time and improve quality as well. But, there is another way too – if you have many regression test cases that need testing then automation of them can solve many problems for you.

Partial Regression Testing means when regression testing is done on a module where the change in the code is related to that particular module and there wont be any change impact on other modules. In simple words, We do regression by re-executing the tests against the modified application to evaluate whether the modified code breaks anything which was working earlier. Anytime we do modify an application, we should do regression testing .

What is white box testing techniques?

White box testing is a testing technique, that examines the program structure and derives test data from the program logic/code. The other names of glass box testing are clear box testing, open box testing, logic driven testing or path driven testing or structural testing.

There could be new versions of tools that have been used in the past to access the archive. These new versions need to be exercised to ensure that they work with the archive. They are not likely to be tested unless the administrator forces a test. Inclusiveness measures the amount of fault revealing test cases selected by a technique, i.e., if a technique is safe, inclusiveness is 100%. To conduct smoke testing you need a subset of test cases which test primary and core product workflows, such as startup and login, and can run very quickly.

For example, while one case may cover many conditions, it could also cover only one such condition. Hence, there is no proper estimate to the amount of detail that needs to be taken into consideration while executing the regression test cases. It is advisable for regression tests to be executed as often as possible throughout the software development life cycle.

New Test Cases For Impact Of Changes

Teams must verify that new code does not conflict with older code, and that code that has not been changed is still working as expected. In such scenarios, it is mandatory that a consistent test management and requirement management approach is followed so that new testers can also perform regression testing effectively.

Postrd by:
Comments are closed.