Regression Testing in Agile – All you need to know

Overview

In modern software development, Regression testing plays a vital role in the sustainability of product behaviors as a whole. In this article, we will walk you through some concepts of Regression testing in Agile development approach.

Regression testing: All you need to know

What is regression testing?

Regression Testing is a testing practice that helps ensure the performance of the application as expected after any code changes, updates, or modifications. In a complex software system nowadays, even a mild code alternative can lead to dependencies, defects, or malfunctions. Regression Testing emerges as an ultimate solution to mitigate these risks.

Generally, the software has to pass multiple tests before the changes are integrated into the main development branch. Regression testing is the final step, ensuring the overall stability and functionality of the application.

What are typical circumstances to apply regression testing?

Regression testing is executed under these circumstances:

  • A new requirement is added to an existing feature
  • A new feature or functionality is added
  • The codebase is fixed to solve defects
  • The source code is optimized to improve performance
  • Patch fixes are added
  • Changes in configuration

What are the benefits of regression testing?

Regression testing is vital in software development because of these benefits: 

  • Regression testing locates new bugs or defects early in the deployment cycle whenever code changes. Thus, it helps prevent your company from spending much time, resources, and effort to resolve build-up defects.
  • Apart from inspecting new feature performance, Regression testing ensures newly added codes do not conflict with existing features. Thus, the software team can find it less difficult to investigate the root cause of test case failures more quickly.
  • Regression testing is an essential assistant in those projects that undergoes frequent code modifications and continuous improvements.
  • With a rapid regression testing process, software teams can receive more informative feedback and respond to unexpected risks more quickly and effectively. 

How to execute regression testing?

Regression testing process

Regression testing practices are different among organizations. However, it will go through these typical steps:

Regression testing steps

  • Detect the modification in the source code, then determine what components or modules need to change.
  • Prioritize those changes and product requirements to organize the testing process with appropriate test cases and testing tools
  • Determine the entry point as well as entry criteria to ensure your application satisfies the preset eligibility before running regression testing.
  • Determine the final point for the required eligibility set in the previous step.
  • Finally, schedule the appropriate time to implement regression testing.

Regression testing technique

There are three common regression testing techniques: complete testing, partial testing, and test case prioritization.

  • Complete Regression: regression testing is executed on all test suites. This method enables the product team to detect and resolve all the bugs and avoid the possible risks in the future. However, it costs a vast amount of time and effort. That is also a reason that complete regression testing is applied under some specific contexts – for example, when the application is adjusted for a new platform or language.
  • Partial Regression: run regression testing on some chosen parts that are potentially affected by code changes or updates. This technique helps reduce the time and effort invested in regression testing due to limited test areas.
  • Test case prioritization: Software team will prioritize some test cases to implement first based on criteria such as product requirements, failure rate, or business impact. The test cases that are related to customer-facing aspects or newly added functionalities are usually high priorities to execute first.

Regression testing and Re-test practice

Although these terms of software testing sound similar, they are different in every aspect.

Regression Testing is a testing practice that is applied to ensure the code changes, updates, or modifications cause no effects to the application performance. In other words, regression testing is responsible for the overall stability of the system under continuous improvements. 

Re-testing literally means implementing the test case again. For example, you re-run that test case again after fixing detected bugs check whether the application can perform as expected or not. 

There are some different characteristics of Regression testing and Re-testing: 

  • Regression testing is usually executed after re-testing practice. 
  • Regression testing is applied to those codes that have passed the testing to ensure the new code changes do not affect the application performance. In contrast, re-testing is responsible for testing the failed test cases again and involves error verifications. 
  • Automation testing is the crucial assistant for regression testing as it helps reduce the time and manual effort of testers.

Regression testing in Agile development approach

Agile development approach can bring various benefits and values for your business, such as speed up time-to-market, high product quality, ROI as well as customer support. However, it remains a challenge to balance the sprint development and iterative testing to avoid conflicts as the product matures.

Regression testing in Agile implementation is responsible for aligning the existing and updated functionalities, as such, eliminate unexpected risks in the future and ensure the overall sustainable performance of the business.

Want to know more about Regression testing? Check out this article.

Ultimate automation testing tools for regression testing

In the thriving pool of automation testing tools nowadays, there are numerous options for the product team to facilitate their regression testing. Some recommendations are Katalon Studio, Selenium, Watir, IBM Rational Functional Tester, Apache JMeter.

Katalon Studio offers an all-in-one automation testing tool that is appropriate for those with or without programming skills. This tool provides a testing solution for your website, web services, and mobile application.

Conclusion

Regression testing is vital in optimizing the quality and user experience of a software product. By disposing of defects early in the deployment pipeline, Regression testing accelerates the time-to-market of a software product, creating competitive advantages for a company to battle in today’s software marketplace. So it’s time to invest in regression testing to better control the budget, process as well as error mitigation of your software development.

 

5 Best Benefits of Implementing CI/CD in Your Organization

Introduction

CI/CD, comprises of two related practices — continuous integration and continuous delivery, is an integral part of modern development that intended to reduce errors during integration and deployment while increasing project velocity. CI/CD has a myriad of benefits, in this article, we will walk you through the 5 best benefits of implementing CI/CD in your organization.

benefits-of-implementing-ci-cd

5 Benefits of Implementing CI/CD in Your Organization

1. Reduce Costs

Automation in the CI/CD pipeline reduces the number of errors that can take place in the many repetitive steps of CI and CD. Doing so also frees up developer time that could be spent on product development as there aren’t as many code changes to fix down the road if the error is caught quickly. Another thing to keep in mind: increasing code quality with automation also increases your ROI.

Some popular CI/CD tools that are currently available on the market are: Github and Bitbucket, Jenkins for build automation, and Selenium and Katalon Studio for test automation.

2. Customer Satisfaction

The advantages of CI/CD do not only fall into the technical aspect but also in an organization scope. The first few moments of a new customer trying out your product is a make-or-break-it moment.

Don’t waste first impressions as they are key to turning new customers into satisfied customers. Keep your customers happy with fast turnaround of new features and bug fixes. Utilizing a CI/CD approach also keeps your product up-to-date with the latest technology and allows you to gain new customers who will select you over the competition through word-of-mouth and positive reviews.

Your customers are the main users of your product. As such, what they have to say should be taken into high consideration. Whether the comments are positive or negative, customer feedback and involvement leads to usability improvements and overall customer satisfaction.

Your customers want to know they are being heard. Adding new features and changes into your CI/CD pipeline based on the way your customers use the product will help you retain current users and gain new ones.

3. Faster Release Rate

Failures are detected faster and as such, can be repaired faster, leading to increasing release rates. However, frequent releases are possible only if the code is developed in a continuously moving system.

CI/CD continuously merges codes and continuously deploys them to production after thorough testing, keeping the code in a release-ready state. It’s important to have as part of deployment a production environment set up that closely mimics that which end-users will ultimately be using. Containerization is a great method to test the code in a production environment to test only the area that will be affected by the release.

4. Increase Team Transparency and Accountability

CI/CD is a great way to get continuous feedback not only from your customers but also from your own team. This increases the transparency of any problems in the team and encourages responsible accountability.

CI is mostly focused on the development team, so the feedback from this part of the pipeline affects build failures, merging problems, architectural setbacks, etc. CD focuses more on getting the product quickly to the end-users to get the much-needed customer feedback. Both CI and CD provide rapid feedback, allowing you to steadily and continuously make your product even better.

5. Smaller backlog

Incorporating CI/CD into your organization’s development process reduces the number of non-critical defects in your backlog. These small defects are detected prior to production and fixed before being released to end-users.

The benefits of solving non-critical issues ahead-of-time are many. For example, your developers have more time to focus on larger problems or improving the system and your testers can focus less on small problems so they can find larger problems before being released. Another benefit (and perhaps the best one) is keeping your customers happy by preventing them from finding many errors in your product.

Want to dive deeper into the benefits of CI/CD? Check out this article

Conclusion

Nowadays, companies are striving for faster release cycles and higher quality software. While CI/CD is beneficial in many ways, it’s no one-size-fits-all solution for every organization. I hope this article will help you decide if this is the right step for your organization to take.

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