Top 50 playwright testing tool Interview Questions and Answers
1. Question: What is Playwright testing tool?
Answer: Playwright is an open-source testing tool developed by Microsoft that allows developers to automate browser testing across multiple browsers and platforms.
2. Question: What are the key features of Playwright?
Answer: Playwright offers several key features, including multi-browser support (Chrome, Firefox, WebKit), cross-browser testing, support for mobile browsers, automatic waiting and synchronization, and the ability to capture screenshots and videos during tests.
3. Question: How is Playwright different from other testing tools like Selenium?
Answer: Playwright provides a more powerful and consistent API compared to Selenium. It supports multiple browsers out of the box, offers improved speed and reliability, and has built-in support for modern web features like WebSockets and Shadow DOM.
4. Question: What programming languages are supported by Playwright?
Answer: Playwright supports multiple programming languages, including JavaScript, Python, and C#. It provides language-specific libraries and bindings for seamless integration with different development stacks.
5. Question: How can you install Playwright?
Answer: Playwright can be installed using npm (Node Package Manager) for JavaScript or pip for Python. The installation process is straightforward and well-documented in the Playwright documentation.
6. Question: Can Playwright be used for mobile testing?
Answer: Yes, Playwright supports mobile testing. It provides a built-in emulation mode for various mobile devices and browsers, allowing developers to write tests that simulate mobile interactions.
7. Question: How does Playwright handle asynchronous operations?
Answer: Playwright has built-in support for automatic waiting and synchronization. It waits for network requests, animations, and other asynchronous operations to complete, ensuring that the test script progresses only when the page is ready.
8. Question: Can Playwright interact with elements on a webpage?
Answer: Yes, Playwright allows you to interact with elements on a webpage. It provides methods to click elements, type text, select options from dropdowns, and perform other common interactions.
9. Question: How does Playwright handle browser-specific behaviors?
Answer: Playwright provides consistent behavior across different browsers by abstracting browser-specific differences. It offers APIs to handle browser-specific features and behaviors, ensuring test scripts work consistently across all supported browsers.
10. Question: Can Playwright capture screenshots and videos during tests?
Answer: Yes, Playwright allows you to capture screenshots and videos during test execution. It provides methods to capture screenshots of the current page or record videos of the entire test session.
11. Question: How can you handle authentication and login scenarios in Playwright?
Answer: Playwright provides methods to fill in login forms, submit credentials, and handle authentication scenarios. It also supports handling cookies and managing user sessions.
12. Question: Can you run Playwright tests in a headless mode?
Answer: Yes, Playwright supports running tests in both headless and non-headless modes. Headless mode allows tests to run without a visible browser UI, making it suitable for running tests in a CI/CD environment.
13. Question: How can you handle timeouts and delays in Playwright?
Answer: Playwright provides options to configure timeouts and delays during test execution. You can set timeouts for various operations like page navigation, element visibility, or network requests to ensure tests don't hang indefinitely.
14. Question: Does Playwright support parallel test execution?
Answer: Yes, Playwright supports parallel test execution. You can run tests concurrently across multiple browser instances, speeding up the overall test execution time.
15. Question: Can Playwright integrate with popular test frameworks?
Answer: Yes, Playwright can integrate with
popular test frameworks like Jest, Mocha, and Jasmine. It provides specific integrations and plugins to simplify test setup and execution within these frameworks.
16. Question: How can you handle browser console output in Playwright?
Answer: Playwright allows you to capture and handle browser console output during test execution. You can access console logs, errors, and warnings and assert on specific log messages.
17. Question: Does Playwright support browser context isolation?
Answer: Yes, Playwright supports browser context isolation. It allows you to create multiple isolated browser contexts, each with its own set of cookies, caches, and storage, providing a clean state for each test.
18. Question: How can you debug Playwright tests?
Answer: Playwright provides built-in debugging capabilities. You can use the "debug" mode to pause test execution at breakpoints and inspect the page and its elements during runtime.
19. Question: Can Playwright interact with iframes and nested elements?
Answer: Yes, Playwright can interact with iframes and nested elements. It provides methods to switch between frames, locate elements within frames, and perform interactions within iframe contents.
20. Question: How does Playwright handle flaky tests or intermittent failures?
Answer: Playwright's automatic waiting and synchronization mechanisms help reduce flakiness in tests. Additionally, it provides retry mechanisms and assertions to handle intermittent failures and ensure test reliability.
21. Question: Can Playwright test applications built with frameworks like React or Angular?
Answer: Yes, Playwright can test applications built with popular frameworks like React, Angular, and Vue.js. It provides APIs to locate elements based on attributes, CSS selectors, or XPath, making it compatible with various web frameworks.
22. Question: Does Playwright support testing on different operating systems?
Answer: Yes, Playwright supports testing on different operating systems, including Windows, macOS, and Linux. It provides consistent APIs across platforms, ensuring tests can be written once and run on multiple OS environments.
23. Question: How can you generate test reports with Playwright?
Answer: Playwright itself doesn't provide test reporting capabilities. However, you can integrate it with popular test runners and frameworks that offer built-in reporting features, such as Jest or Mocha.
24. Question: Can Playwright interact with browser cookies and local storage?
Answer: Yes, Playwright allows you to interact with browser cookies and local storage. You can set and retrieve cookies, clear storage, and manipulate browser storage during test execution.
25. Question: How can you handle file uploads in Playwright?
Answer: Playwright provides methods to handle file uploads. You can simulate file selection, attach files to file input elements, and validate successful file uploads.
26. Question: Does Playwright support geolocation and device emulation?
Answer: Yes, Playwright supports geolocation and device emulation. You can simulate different geolocations and emulate various devices, allowing you to test location-based features and responsive designs.
27. Question: How can you handle pop-ups and dialogs in Playwright?
Answer: Playwright provides methods to handle pop-ups, alerts, and dialogs during test execution. You can accept or dismiss alerts, enter text in prompt dialogs, or handle unexpected pop-ups.
28. Question: Can Playwright interact with web APIs, such as Fetch or XHR?
Answer: Yes, Playwright allows you to intercept and modify network requests, including Fetch and XHR requests. This feature enables you to mock responses, stub APIs, or test specific network behaviors.
29. Question: How can you run Playwright tests in a CI/CD pipeline?
Answer: Playwright integrates well with popular CI/CD tools like Jenkins, CircleCI, and Azure DevOps. You can configure your pipeline to install dependencies
, run test scripts, and generate test reports using Playwright.
30. Question: Can Playwright handle testing scenarios involving multiple browser tabs or windows?
Answer: Yes, Playwright can handle testing scenarios involving multiple tabs or windows. It provides methods to open new tabs, switch between them, and interact with elements within each tab or window.
31. Question: Does Playwright support visual testing and image comparisons?
Answer: Yes, Playwright supports visual testing and image comparisons. It provides functionality to capture screenshots and compare them with baseline images, allowing you to detect visual regressions in your UI.
32. Question: How does Playwright handle network mocking and stubbing?
Answer: Playwright provides a robust mechanism to intercept network requests and stub responses. You can define custom request handlers, mock network responses, and test different network scenarios.
33. Question: Can Playwright interact with browser extensions or plugins?
Answer: Yes, Playwright can interact with browser extensions or plugins. It provides methods to install, enable, and disable extensions during test execution, allowing you to test their integration with your application.
34. Question: How can you handle dynamic content and data-driven tests in Playwright?
Answer: Playwright allows you to extract dynamic content and data from the page during test execution. You can dynamically locate elements, validate data, and parameterize tests using external data sources.
35. Question: Does Playwright provide support for test fixtures and setup/teardown functions?
Answer: Yes, Playwright provides support for test fixtures and setup/teardown functions. You can define reusable setup and teardown logic for your tests, ensuring consistent test environments and reducing code duplication.
36. Question: Can Playwright handle browser-specific user agent strings?
Answer: Yes, Playwright allows you to modify the user agent string of the browser, simulating different browsers or versions. This feature is useful for testing browser-specific behaviors or performing cross-browser compatibility checks.
37. Question: How does Playwright handle browser page navigation and URL changes?
Answer: Playwright provides methods to navigate to different URLs, refresh the page, or handle URL changes during test execution. You can assert on expected URLs and test page navigation flows.
38. Question: Can Playwright interact with web components and Shadow DOM?
Answer: Yes, Playwright can interact with web components and elements inside the Shadow DOM. It provides APIs to locate and manipulate Shadow DOM elements, making it compatible with modern web development techniques.
39. Question: How can you handle test data cleanup and environment resets in Playwright?
Answer: Playwright allows you to perform cleanup and environment resets using its API. You can delete cookies, clear local storage, or perform other cleanup tasks between test runs to ensure a clean state for each test.
40. Question: Does Playwright support browser page zooming and viewport manipulation?
Answer: Yes, Playwright supports browser page zooming and viewport manipulation. You can simulate different viewport sizes, zoom levels, and device resolutions, allowing you to test responsive designs and layout behavior.
41. Question: Can Playwright integrate with test coverage tools?
Answer: Yes, Playwright can integrate with test coverage tools like Istanbul or Jest's coverage plugin. You can generate code coverage reports for your Playwright tests, measuring the extent of your test coverage.
42. Question: How does Playwright handle test synchronization and parallelism?
Answer: Playwright handles test synchronization automatically using its built-in waiting mechanisms. It also supports parallel test execution, allowing you to run tests concurrently across multiple browser instances or processes.
43. Question: Can Playwright handle browser-specific security features, such as CORS or CSP?
Answer: Yes, Playwright can handle browser-specific security features like CORS (Cross-Origin Resource Sharing) or CSP (Content
Security Policy). It provides options to bypass or modify these security restrictions during test execution.
44. Question: Does Playwright provide support for testing single-page applications (SPAs)?
Answer: Yes, Playwright provides support for testing single-page applications. It offers methods to wait for SPA-specific navigation events, handle dynamic content updates, and interact with SPA frameworks like React or Angular.
45. Question: How can you handle test dependencies and test data management in Playwright?
Answer: Playwright allows you to manage test dependencies and test data using the programming language of your choice. You can leverage external libraries or frameworks to handle data generation, fixtures, or mocking.
46. Question: Can Playwright interact with browser notifications or geolocation prompts?
Answer: Yes, Playwright can interact with browser notifications and geolocation prompts. It provides methods to accept or dismiss notifications, mock geolocation data, or handle other browser-specific prompts.
47. Question: How does Playwright handle browser page performance metrics?
Answer: Playwright allows you to access various page performance metrics, such as network requests, load times, or JavaScript execution timings. You can measure and assert on these metrics during test execution.
48. Question: Can Playwright handle testing scenarios involving iframes from different domains?
Answer: Yes, Playwright can handle testing scenarios involving iframes from different domains. It provides methods to switch between frames, locate elements within iframes, and interact with elements across different domains.
49. Question: How can you handle test data encryption or sensitive data in Playwright?
Answer: Playwright doesn't provide built-in encryption or secure data storage features. However, you can leverage your programming language's encryption libraries or external tools to handle encryption or secure data management in your tests.
50. Question: Does Playwright support test parallelization across multiple machines or environments?
Answer: Yes, Playwright supports test parallelization across multiple machines or environments. You can distribute tests across different machines or cloud services, allowing you to scale your test execution and reduce overall test runtime.
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