A Complete Guide to Configuration Testing in Software Testing

Almost every other week, new devices, OS versions, and browser updates get released. But what if your app fails to work on a device that just launched? It directly impacts brand trust, and you risk losing users.

Therefore, when you’re building an app, you must make sure it’s compatible with all the versions of devices, browsers, hardware, and networks your end users access.

So how do you keep up with the frequent releases and ensure your app runs smoothly on any setup? Configuration testing helps you do that. It keeps you ahead of the changing configurations so you can serve your users well, no matter how and where your app is used.

In this blog, we’ll see what configuration testing is, what its types are, how to perform testing in a structured way, and some example test cases to get you started.

TL;DR

• Configuration testing checks how an application functions on different combinations of software, hardware, network, and system settings

• Different configurations can be RAM sizes, storage, GPUs, databases, OS versions, bandwidth, firewalls, proxies

• Configuration testing ensures compatibility across environments, detects defects early, and improves user experience

• Configuration testing types include hardware configuration testing, software configuration testing, client-level configuration testing, and server-level configuration testing

• Automating configuration testing requires selecting a configuration matrix, designing test cases, executing them, and analyzing results

What Is Configuration Testing?

Configuration testing is a process of testing an application or system on different combinations of software and hardware, such as operating systems, browsers, drivers, memory sizes, network conditions, and CPU types.

The main aim here is to identify potential compatibility issues, resolve them before they reach end users, and ensure the app performs well across different configurations.

Why Configuration Testing Matters

Your users connect to your app from different devices and browsers. And each of the devices has different screen resolutions, input methods, and storage.

Your app must be able to function as intended on all of these configurations. Without proper testing, your users might encounter compatibility issues and unexpected errors. Here’s why you cannot skip configuration testing:

• Ensure compatibility across different environments: It helps you verify that your app’s performance is consistent on multiple browsers, devices, OS, and hardware setups

• Detects defects: You can identify hidden defects or bugs that might not appear when you’re testing in a single environment

• Reduces production failures: Testing your app on multiple configuration combinations helps you uncover potential problems before release and reduces costly post-release fixes

• Enhances user experience: Validating your app across devices and browsers users use ensures all critical functionalities work smoothly, which in turn enhances user experience

What Are the Different Approaches to Configuration Testing?

There are mainly four types of configuration testing in software testing.

Here’s a quick look at what they are.

Now, let’s talk in detail about all the configuration testing approaches and how to perform them.

1. Software configuration testing

This type of testing checks if your app is compatible with different software environments, such as browsers, operating systems, and third-party integrations. To do this, you reset the testing environment over and over again and verify if your app works properly in each configuration.

2. Hardware configuration testing

This testing helps you verify if your app can run smoothly on various hardware setups like processors, memory configurations, and graphics cards. So after you release a build, you test the app on physical machines and against different hardware combinations to make sure it’s working as expected.

3. Client-level configuration testing

This testing is closely related to functionality and usability testing. Here, you test your app from the client’s perspective. You test the app on different devices that end users normally use, such as smartphones, desktops, and tablets, as well as across varying screen sizes, resolutions, and network conditions.

4. Server-level configuration testing

In this testing, you mainly focus on server configurations. You assess the app on different OS versions, middleware, databases, and cloud settings to ensure your app’s server-side performance is stable.

How to Automate Configuration Testing?

Before we talk about the process of configuration testing in software testing, let’s see how automation helps:

• Run dozens of configurations within minutes rather than waiting for days, which speeds up the feedback cycles

• Improve test coverage by expanding the number of tested combinations without stressing out your team

• Easily adjust your testing matrix as your app evolves or when environments change

• Catch performance gaps, layout issues, or functional errors early

In fact, organizations are increasingly investing in automation to enhance their QA workflows. Reflecting this shift, the global test automation market is estimated to grow from $25.43 billion in 2023 to $92.45 billion in 2030.

Now that you know how automating configuration testing helps, here are the typical steps to do it.

1. Select configuration matrix

The configuration matrix is usually built based on real user data, coverage goals, and high-risk environments. So, before you start testing, decide which configuration combinations you want to test your app on.

Typically, these combinations can be:

2. Develop structured test cases

The next step is to verify core user flows and the critical features of your app. For this, you need to design structured test cases that cover all scenarios so you can achieve maximum coverage.

The test cases you write should be modular, reusable, and compatible across environments so you can run scripts on many setups with minimal adjustments.

Here are some test cases you can refer to:

• Validate login functionality on Chrome 120

• Check layout responsiveness at a screen resolution of 1920 x 1080

• Ensure items are added, updated, and deleted correctly in the cart on Android 14

• Test image loading speed under a 3G network

• Check the form submission feature on Windows 10

3. Select automation and test execution tools

Once you’ve written the test cases, select the tools you would need for generating test scripts and executing them. Here are some tools QA teams generally use for automation testing.

• Test automation frameworks: Selenium, Playwright, Appium, Puppeteer, and Cypress

• CI/CD tools: Jenkins, CircleCI, Bamboo, Azure DevOps, and TravisCI

• Containerization software: Docker, Kubernetes, Amazon ECR, and Harbor

• Issue trackers: Jira, Redmine, Bugzilla, and BugHerd

• Collaboration tools: Slack, MS Teams, and Asana

4. Run tests on your preferred configurations

After choosing the tools you need for testing, select the configuration combinations you want to test. You can run tests in parallel or sequentially. These are some tips you can use to optimize your testing process:

• Select the configurations based on data showing what your users actually use the most

• You can choose virtual or cloud-based testing environments to speed up execution

• Test every configuration after every release

• Focus on testing the high-traffic or high-risk setups after every hotfix or patch release

5. Gather and analyze results

The CI/CD tools will automatically gather the test results and visualize them in reports or dashboards to help you analyze them easily.

So, after you have completed executing the tests, the automation tools will collect data on passed/failed configurations, performance of apps in each configuration, and layout shifts or UI inconsistencies.

You can correlate results with real user data to identify the high-impact areas that need to be fixed on a priority.

6. Maintain and optimize your automation suite

Finally, update the configuration matrix regularly so it reflects the current user trends. Remove the configuration combinations no longer in use to reduce maintenance.

Refactor flaky test cases to improve stability and implement version control so you can track the changes in configurations and easily reproduce test environments.

Configuration Testing: Example Test Cases

1. Verify application launch on different operating systems

OS configuration: Windows 10, Windows 11, Ubuntu 22.04

Test steps

• Install the app on the target OS configurations

• Launch the app

• Check for unexpected errors or crashes

2. Verify login functionality across different browser configurations

Browser configurations: Chrome 89, Safari 14, Firefox 86

Test steps

• Launch browser

• Navigate to the app login page

• Enter valid credentials

• Click on the login button

• Observe redirection and check if the user lands on the dashboard

3. Verify application performance under different network conditions

Network configurations: 3G, 4G, 5G, Wi-Fi, offline mode

Test steps

• Simulate every network type

• Launch and use the app

• Observe load time, offline errors, or sync delays

• Check if the app can handle timeouts and reconnections

Consider these Best Practices for Effective Configuration Testing

1. Prioritize real user environments

Analyze user analytics to identify the most common devices, operating systems, and browsers your users rely on, rather than testing every possible combination. This will help you save time and resources, as well as ensure critical workflows and features function correctly where they matter the most.

Pro tip User behavior keeps changing. So, you must regularly monitor usage data and market trends to know which configurations to focus on.

2. Keep your configuration matrix up to date

Your configuration matrix includes several combinations of devices, browsers, hardware, and operating systems. If you don’t update these regularly, you might keep testing your app on configurations that are outdated, which leads to wasted efforts and reduces test accuracy.

Therefore, review user analytics, track updates on versions or newly released devices, and remove obsolete configurations.

Pro tip Integrate the configuration matrix into your CI/CD pipelines so that every time you update a browser version or add a new device, relevant tests automatically run across all updated configuration combinations.

3. Use containerization and virtualization

Configuration and virtualization allow you to replicate multiple testing environments without the need to set up physical hardware for every configuration.

You can use containerization tools like Docker to encapsulate your app along with its dependencies and ensure it behaves consistently across setups.

Also, use virtual machines to simulate different OS and browser versions, and hardware conditions, and scale testing efficiently.

Pro tip You can use infrastructure-as-code tools to automatically configure and provision your containers and virtual machines. This helps you spin up or tear down environments on demand without manual intervention and ensures consistent and reproducible configurations.

4. Test early in the development cycle

Start testing early, either during development or in the staging environment. This will help you detect compatibility issues before they get too complex to fix and reduce the risk of production failures.

Pro tip Directly integrate testing into your development pipelines and run automated configuration checks right after code changes or during nightly builds.

Optimize Your Configuration Testing with TestGrid

TestGrid is an AI-powered test automation platform that lets you test your apps on multiple configurations of devices, browsers, and network conditions.

The platform’s real device cloud helps you test your mobile apps and website on different combinations of real iOS and Android devices so you can ensure your app is compatible with all the latest OS versions.

With TestGrid’s automated cross-browser testing feature, you can build and execute tests across different browsers in parallel and ensure your end users are getting the best experience.

You can even host your own secure device lab to test your apps across devices and OS versions, as well as monitor usage, deploy updates, and manage distributed teams via a single interface.

Bringing It All Together

The market today is flooded with different devices. While it’s exciting for end-users to have so many options to choose from, for a tester, each new update or addition in hardware and software increases complexity.

Configuration testing streamlines your efforts and helps you manage different combinations of devices, browsers, OS, and network in a structured way. And automation further simplifies your testing process by triggering relevant tests every time you add a new configuration.

But for this, you need the right tools that allow you to easily build, manage, execute, and maintain tests across multiple setups. And configuration testing with TestGrid helps you achieve that.

This blog is originally published at Testgrid