Accessibility Testing with Automation Tools

By Nicolás Pereira y Micaela González.

Introduction to Accessibility Testing

Accessibility testing is a fundamental practice for optimizing web and mobile applications, ensuring they are usable by a broad audience, including individuals with disabilities, whether visual, auditory, or other physical or cognitive impairments.

In today’s digital age, where applications play a crucial role in our daily lives, ensuring accessibility for a diverse audience is essential.

The Web Content Accessibility Guidelines (WCAG)

One of the essential foundations for conducting accessibility testing is understanding and following accessibility standards such as the Web Content Accessibility Guidelines (WCAG). These guidelines, developed by the World Wide Web Consortium (W3C), serve as a fundamental framework that sets standards and criteria for achieving effective accessibility in the digital environment.

The WCAG not only serves as a globally recognized standard, but also provides a detailed technical framework to address key accessibility aspects. These guidelines are organized around four fundamental principles: perceivable, operable, understandable, and robust. Each principle breaks down into guidelines and success criteria, establishing a clear framework for evaluating and improving an application’s accessibility.

Automated Accessibility Testing with Playwright

Accessibility test automation can be an efficient way to identify and correct accessibility problems in an application. One tool that can help us in this process is Playwright, a web test automation engine that allows us to simulate interaction flows with the application and run tests.

One way to use Playwright for accessibility testing is through the AxeDev Tools, which implement the accessibility features of Google Lighthouse in Playwright. With AxeDev Tools, we can scan a webpage’s structure and get a detailed analysis of detected accessibility errors within seconds.

Examples of Automated Accessibility Testing with Playwright

Here are some examples of how Playwright and AxeDev Tools can be used to conduct automated accessibility testing:

• Example 1: Verifying accessibility of a specific URL. In this case, Playwright and AxeDev Tools can be used to scan a webpage and provide a detailed report of accessibility errors. The analysis can be customized to obtain the required information, which can then be used to correct accessibility issues.
• Example 2: Verifying accessibility of multiple URLs. Here, Playwright and AxeDev Tools can scan a list of URLs and provide a consolidated report of accessibility errors found across all the pages. This allows us to efficiently evaluate the accessibility of multiple pages.
• Example 3: Custom configuration of accessibility tests. Playwright and AxeDev Tools allow the customization of accessibility test configurations to suit specific needs. We can adjust the version of the WCAG standard for evaluation, exclude certain accessibility errors or rules, skip analysis of certain web elements, and more. This helps obtain more precise and meaningful results for our needs.
• Example 4: Verifying accessibility in an end-to-end functional flow. In this case, not only can we automate a system’s functional flow and carry out the necessary functional checks, but we can also check accessibility on each page as the flow progresses. This allows us to optimize time by conducting both functional and accessibility tests simultaneously.

If you’d like to have a project base to boost your skills in automated accessibility testing, we invite you to explore our GitHub repository, where you’ll find a Template for automated tests with Playwright and AxeCore

Conclusions

Accessibility testing is a fundamental practice to ensure that our web and mobile applications are accessible. Automating these tests with tools like Playwright and AxeDev Tools allows us to identify and fix accessibility issues efficiently and accurately, saving time and resources while conducting more comprehensive and thorough tests.

By using these tools, we can follow the guidelines set by WCAG and significantly improve the accessibility of our applications.

We hope this article has been useful in understanding the importance of accessibility testing and how to use automation tools to carry out these tests. Remember, accessibility is key to ensuring an inclusive and high-quality digital experience for all users.

Ensure the Accessibility of Your Application!

At QAlified, we offer specialized services in accessibility testing. Our team of testing experts is equipped to evaluate and improve the accessibility of your web and mobile applications, following WCAG guidelines.

If you want to ensure your application is accessible to all users, feel free to contact us. We’ll be happy to help you identify and resolve any accessibility issues, guaranteeing an inclusive and high-quality digital experience.

Don’t let accessibility go unnoticed. Contact us today and ensure your application’s accessibility!