Many stakeholders see software development as a linear process — the software is written, tests are run, and the code is deployed. On the other hand, many developers know that seemingly benign changes to a piece of code can have a ripple effect across the application. Regression testing is the only reliable way to make sure that everything works.
Small changes to a piece of code can have a ripple effect across an application, which makes regression tests important to ensure everything works.
Let's take a look at three challenges that teams face with regression tests and how to overcome them.
What is Regression Testing?
Regression tests determine if new code changes break existing functionality. The goal is to catch any bugs that may have been accidentally introduced to a new build or release candidate before they reach production, as well as ensure that any old bugs that were fixed don't resurface. These efforts can significantly cut down on the time spent squashing bugs, as well as the number of defects that reach production.
The regression testing process involves rerunning test scenarios to ensure that features still work. These test scenarios might include unit tests that ensure methods return the proper results or functional tests that ensure the user workflow behaves as expected. These tests may be run automatically as part of a build server or manually by quality assurance.
While regression tests were traditionally performed by quality assurance teams after the development team completed their work, it became apparent that defects found after the fact were more costly to fix. Modern developers write unit test cases prior to writing any code using a test-driven development process, while quality assurance teams focus on high-level functional tests that ensure everything fits together.
Challenge #1: Time & Cost
Regression tests involve running tests that have already passed, which can be hard to justify to stakeholders and mind-numbing for quality assurance engineers. It's hard to justify the time that it takes to create and run the tests, as well as the high cost of test-related services and infrastructure — especially when you don't appreciate the value it adds.
TestComplete helps reduce the time and cost of writing tests. Using its record and replay capabilities, test engineers can create complex and scalable automated user interface tests in seconds. These scripts can then be configured to run automatically as part of a continuous integration (CI) after each new build or release candidate.
Challenge #2: Maintenance & Complexity
Regression tests inevitably become large and complex over the course of a complex development project. The number of test cases, as well as the functions and processes that they check, can easily number in the thousands, which makes it impractical for quality assurance engineers to test manually without consuming significant time and resources.
TestComplete makes it easy to automate regression tests using a wide range of different platforms, such as Jenkins. At the same time, you can manage all of your desktop, web and mobile functional user interface tests within a single application, which eliminates the need for tens or hundreds of different tools and libraries that would be required otherwise.
Challenge #3: Brittle Tests
Regression tests are great when they identify issues before a production build, but there's nothing more frustrating than a test suite that throws constant false positives — or tests that fail when they should pass. Brittle tests that generate false positives are frustrating for stakeholders, developers and test engineers and could make everyone second-guess the process.
TestComplete comes with an intelligent object repository and support for over 500 controls, so you can ensure that your GUI tests are scalable, robust and easy-to-maintain. Whereas small UI changes could break Selenium tests, TestComplete's hybrid object recognition engine leverages artificial intelligence to detect and test dynamic elements quickly and accurately.
Best Practices to Keep in Mind
Regression tests can be challenging to create and maintain, especially with limited resources, but there are many best practices that you can use to keep things running smoothly and avoid the pitfalls that can derail the development process.
Some best practices to keep in mind include:
- Automate Testing: Automated regression testing dramatically cuts down on long-term time and costs. Manual quality assurance testers will become bored and lose motivation if they're required to rerun the same tests all the time.
- Narrow the Focus: Focus on the most frequent use cases for the software application rather than trying to test everything at once. For example, user sign-ups, user sign-ins or purchases might be the best starting points.
- Prune the Pack: Regression tests take up time and resources, so it's important to remove any tests that check if old features work or cover obsolete versions of the software. You should only be testing what really matters.
- Use the Insights: Regression tests are only as useful as test engineers and developers make them. Create easy ways to transform regressions into tickets for developers, as well as reporting tools to keep stakeholders informed.
TestComplete makes it easy to adhere to these best practices across desktop, web and mobile devices. You can easily organize regression tests through integration with test management platforms, like Jira or QAComplete, while automating the tests via integrations with continuous integration services, like Jenkins, Azure DevOps and TeamCity.
The Bottom Line
Regression tests are an important part of the software development process, but there are several challenges to making them truly useful. Using TestComplete and other tools, you can overcome these challenges and make regression testing faster, more accurate, and more cost-effective — delivering the full benefits of Agile development.
Download a trial of TestComplete today to see how easy it is to streamline your functional UI tests.