Using Playwright? Here Are the Challenges You Need to Know

Developers nowadays face challenges like “Lot fewer examples/documentation out there on how to "structure" the framework” or “challenge of initializing the page beans in parallel run”. 

However, they are not just the challenges in using Playwright being encountered, there are others too that require to be addressed. In this article, we will be discussing those challenges that you need to know about Playwrights. Along with this, we will also highlight some best practices of Playwright testing to overcome the challenges. 

So let us get started, but first, let us give you a brief on Playwright. 

What is Playwright? 

Playwright is an open source and freely available automation testing framework developed by Microsoft. It framework is very beneficial for developer as it allows to test web application from start to finish with different coding preferences. This is because Playwright support for various programming languages like JavaScript, TypeScript, Python, C#, and Java. But what exactly make Playwright different from other testing tool? 

The playwright distinguishes itself by automating browsers like Chromium, Firefox, and WebKit; with just one API, you can perform cross-browser testing and ensure your web applications perform flawlessly across different platforms.

Features of Playwright 

Playwright is new to the market, and just having its overview is not just enough. To take full advantage of Playwright testing, you must be aware of its key features. Let us know about those: 

• Cross-browser Testing: It can test seamlessly across various browser engines like Chromium, Firefox, and WebKit.

• Auto-wait feature: This ensures that elements of software application are ready before executing actions, minimizing potential test failures due to flakiness.

• Network Interception: Playwright enables the monitoring and alteration of network requests, which helps in executing Playwright testing across various network scenarios and API interactions.

• Headless Mode: It has the capability to operate browsers in headless mode, a necessary feature for executing tests in CI/CD pipelines without a graphical user interface.

• Strong Selectors: Playwright offers strong selector engines, simplifying the process of finding elements on web pages for interactions.

“Although Playwright for executing tests offers several key advantages like easy setup, multi-browser support, parallel browser testing, etc. It is important to first understand the challenges of using Playwright”

Challenges of Using Playwright 

Addresing the challenges of using Playwright will help you to ensure seamless integration, effective debugging, and improved performance. Further, it can help developers fully leverage Playwright's capabilities, resulting in more reliable test automation. So let us dive deep into detail in knowing about those challenges: 

Challenge 1: Support For Protocols Other Than Browsers is Limited.

Playwright's support is limited to HTTP/HTTPS and browser-specific protocols like data: and blob:. It cannot handle FTP, file downloads, or other non-browser protocols. This restriction means that while Playwright good in automating and testing web applications, it is unsuitable for tasks requiring interaction with non-browser protocols. You should consider alternative tools for comprehensive testing needs involving FTP or file downloads.

Challenge 2: Lack of Native Watch Mode

It does not have a pre-installed feature for monitoring changes done during Playwright testing. This impact the development workflow and Playwright testing process more complicated. It is because of need of manual configuration and upkeep of extra tools or scripts to monitor file changes effectively. Although Playwright is effective for browser automation and testing, its dependency on external libraries for detecting changes can hamper smooth integration and immediate responsiveness when conducting automated tests.

Challenge 3: Environment Files Are Not Natively Supported.

Playwright does not have native support for reading environment files. Developers often turn to external tools like “dotenv” to interpret JSON or other formats, adding an extra task to the development process. You can often face problems in the set-up process because it requires the manual incorporation of external libraries to manage environment configuration when you perform automated testing and development activities. 

Challenge 4: The Limitations of Unit Testing for Playwrights.

Developers should be aware that Playwright is not suitable for unit testing because it prioritizes end-to-end testing and browser automation. You must be knowing that unit testing often needs a framework like Jest in JavaScript designed for testing individual, confined sections of code. However,  when you will be using Playwright for unit testing, it could add unnecessary complexity and overhead since it is designed for higher-level testing instead of the specific, detailed focus needed for unit tests.

Challenge 5: Asynchronous Execution in Playwright

Another crucial challenge in Playwright testing is that the tool fails to work in an asynchronous manner, potentially causing difficulties for developers not accustomed to asynchronous programming. This complexity can heighten the learning curve and create challenges in writing, maintaining, and troubleshooting tests.

Challenge 6: Challenges in Finding Solutions with Playwright

The bug or issue identified during the Playwright testing can be difficult to fix. You may wonder why this is so. Well, the Playwright lacks extensive resources and robust community support. This can lead to longer troubleshooting times and fewer readily available solutions for complex issues found in software application. 

Challenge 7: Unsupported Features

Playwright, being a recently developed library, does not have official backing for some capabilities, such as configuring local storage. Although there are ways to work around them, depending on these methods can make the development process more complex. Developers might have to create their own solutions or try different approaches in order to achieve the desired functionality, potentially leading to higher code complexity and maintenance tasks. 

Challenge 8: Integration with CI/CD Pipelines

Integrating Playwright into the CI/CD pipeline in different environments like Jenkins and Gitlab CI is another crucial challenge faced by everyone. You can think of this due to diverse setup requirements such as configuring environment variables, handling dependencies, guaranteeing consistent browser versions, and establishing necessary permissions for browser access and test execution. 

Challenge 9: Handling Complicated DOM Layouts

It is crucial to note that Playwright is capable of manipulating and interacting with web elements. However, developers often face issues when dealing with complex and constantly changing DOM structures when using Playwright. Hence, when they execute Playwright testing, the test script may have difficulty finding and interacting with elements that are deeply buried in complex DOM trees or dynamically load after page interactions. This could result in unreliable tests or necessitate complex scripting workarounds to manage properly.

Challenge 10: Identifying and Troubleshooting Unstable Tests.

Recognizing and fixing flaky tests, which fail irregularly with no modifications to the application or test code, is a major challenge in Playwright. For developers, getting a flaky test is problematic because it not only undermines the trust in automation results but also consumes developer hours in troubleshooting unpredictable problems and impacts timely responses to software changes. 

Best Practice To Overcome Challenges In Using Playwright 

Challenges in using Playwright are not exceptional issues, as different automation testing frameworks also come with key limitations. The most important part here is to address those challenges so they do not impact the test process and result. Here are some of the best practices of Playwright testing that could help you leverage the true capability of a Playwright and overcome the challenges discussed: 

• Set your test coverage objectives from the start.

Before you start creating end-to-end (E2E) tests for your application, it is important to identify the main workflows that need to be tested. You must concentrate on user experience and user interaction or use an analytical tool that can show the most visited URL, and devices and browsers frequently being used. This give idea on deciding which aspect of app needs to be tested. 

• Utilize consistent selectors for identifying elements.

In order to test the functionality of your web application, you must locate elements on the page and interact with them. Playwright promotes the use of its predefined locators to choose the elements that you want to interact with.

• Automate your tests and keep track of them.

Testing only on your personal computer is not enough for a strong development process. It is important to incorporate them into your CI/CD workflows in order to track them together with your builds.

• Avoid testing third-party integrations.

It is recommended to refrain from directly testing third-party interfaces in your end-to-end tests. Instead of that, use the Playwright Network API to mock these external services. This method allows you to replicate the precise functioning of these connections, ensuring that your tests stay speedy and reliable, regardless of how well the third-party services are performing or their accessibility.

You can also opt for HyperTest which facilitates testing by mocking all third-party dependencies, including databases, message queues, and sockets, as well as dependent services. This approach enables each service to undergo testing independently, even in intricate environments with high interdependence among services. By mocking external dependencies, HyperTest ensures tests can concentrate on verifying the service's functionality itself, free from the uncertainties of real-world dependencies. This method creates a stable and controlled testing environment, enhancing focus on the specific behaviors and outputs of the service being tested without the distractions posed by real external systems.

Conclusion

In this article on using Playwright, we come across numerous challenges that should be taken into account during playwright testing. You must pay attention to every step, from including tests in various CI/CD pipelines to ensuring reliable element selectors for successful testing. Maintaining concentrated and separate tests increases reliability, whereas automating and overseeing tests outside of local environments allows you to have ongoing quality assurance. 

Furthermore, streamlining testing processes can be achieved by avoiding direct testing of third-party integrations and using Playwright's Network API for mocking. By proactively tackling these challenges, you ensure smoother development cycles and stronger, reliable testing results for applications.