Mocking
Test mocking is a methodology in software testing where certain components, functions, or modules are replaced with fake versions, or "mocks", in order to isolate the code under test. These mock objects can be programmed to mimic the behavior of real components but also to return predictable responses, simulate exceptions, or record interactions, which are then verified by the test. The purpose of test mocking is to create a controlled environment where dependencies are neutralized so that the functionality of the individual unit can be tested independently. It helps in reducing the complexity of tests, controlling side effects, improving test performance, and ensuring that tests are not affected by the unreliability or unavailability of external dependencies. Mocking is a key technique in unit testing and is supported by various testing frameworks and libraries.
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Testing Next.js Apps Using Playwright
Supercharge your Next.js app testing with Playwright – a tool for automating Chromium, Firefox, and WebKit browsers. In this guide, I will walk you through setting up and running your first Playwright E2E test for a Next.js application.
How to Mock HTTP Traffic in Playwright Tests
In this article, we will explore how to intercept and mock HTTP traffic in Playwright tests. By doing so, we can create more reliable and efficient tests, while also simulating various scenarios that may be difficult to reproduce otherwise. We will discuss the benefits of using this approach, various ways to intercept and mock HTTP requests, and real-world examples to demonstrate the process. So, let's get started!
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Questions
- What are some reasons why the `page.route()` method in Playwright might not intercept certain requests from a specific component?
- What is the method to mock API responses using Playwright?
- How do I create mock functions and check if certain functions were called in Playwright?
- How do I mock the window.fb object in a Chrome tab using Playwright?
- How can I use Playwright to simulate different server responses in a Next.js application?
- What is the reason for initial test failures and subsequent passes when using fixtures to mock multiple APIs in Playwright Test?
Discord Threads
- How to create mock authenticated users without actually authenticating via oauth?jonroby asked on · 22 messages · unresolved
- Registration data shared between projects?kevi1224 asked on · 11 messages · unresolved
- Mocking chrome.storage.sync APIs w/ Chrome Extensionsoddnaan asked on · 1 messages · resolved
- Can we do unit testing using Playwright?kimi56 asked on · 1 messages · resolved
- Intercepting API to avoid rate limitcaesarsalad asked on · 3 messages · resolved
- Best Approach to only click button?everythingeasy asked on · 1 messages · resolved
- Mocking APIs for POST methodcaesarsalad asked on · 2 messages · resolved
- How to automate a system ?kanewadel asked on · 1 messages · unresolved
- Playwright is unable to resolve import from a custom packageAnand asked on · 5 messages · unresolved
- Problems with mock: status code -1just_negative asked on · 3 messages · unresolved
- Mocking using HARps asked on · 0 messages · unresolved
- locating by name property is failingnarm24 asked on · 6 messages · resolved
- I need to change toHaveScreenshot() directory..zeroan asked on · 9 messages · unresolved · AI answer
- Cannot intercept requests from a particular componentlivchits asked on · 11 messages · unresolved · AI answer
- Intercept an API call and mock the resultshopepunkelsa asked on · 2 messages · unresolved · AI answer
- Different ways to login when application uses a refresh tokenogow_ asked on · 1 messages · unresolved
- Is it possible to do E2E testing in playwright using mock data?fs_projects asked on · 9 messages · resolved
- Mock Api Responseharry_aujla asked on · 1 messages · resolved · AI answer
- Having trouble interacting with page elements without using time.sleep() with playwright-pytestMirk asked on · 19 messages · unresolved
- My Locator suddenly becomes blanklaw5452 asked on · 1 messages · unresolved
- Recording after overwriting the window objectdezzymei asked on · 4 messages · unresolved · AI answer
- Configuring Playwright to use a specific datetimenixin72 asked on · 8 messages · resolved · AI answer
- Session issue with login over APUlumca asked on · 4 messages · resolved
- Getting Error: browser.newPage: Target page, context or browser has been closedashokchhetri asked on · 2 messages · unresolved
- .waitFor() doesn't seem to be workingdisconnexus asked on · 13 messages · unresolved · AI answer
- Tab Testingseandrol asked on · 5 messages · resolved · AI answer
- How to use FirefoxUserPrefs as LaunchOptions on Firefox?Bloomie asked on · 1 messages · resolved
- test.describe() does not support async/await to generate test() ?Linhtinh603 asked on · 4 messages · resolved
- Strange issue with reportingcherry_picker_01 asked on · 14 messages · unresolved
- Modifying network requests and saving to HARstopa asked on · 1 messages · unresolved
- Page hangs after navigation. DOM exception is thrown only in playwrightyabols asked on · 0 messages · unresolved
- Find All Links Using Locatorsasdfhjalgdhalsaslkdfh asked on · 9 messages · resolved · AI answer
- during accessibility testing the comparison fails as the actual snapshot misses some class.cerosh asked on · 0 messages · unresolved · AI answer
- Bypassing Google Authentication Implemented with Next-auth for E2E Testing Using Playwright in App.shirotamaki asked on · 4 messages · resolved
- Foolproof way to check if element is visiblealessiogr asked on · 0 messages · unresolved · AI answer
- Why can't Playwright offer what RobotJS does for keyTap?boutchersj asked on · 0 messages · unresolved
- Compare test against HAR filejelis2605 asked on · 0 messages · unresolved · AI answer
- adapting the codes in selenium to playwrightferman2323 asked on · 2 messages · resolved
- NextJS server actionsdsmith1024 asked on · 2 messages · resolved · AI answer
- Eval on pages that overwrite window.eval?rem.e.rem asked on · 0 messages · unresolved · AI answer
- Tag confusionjhul_11 asked on · 6 messages · resolved · AI answer
- locator.scrollIntoViewIfNeeded -- Options?d3333333 asked on · 0 messages · unresolved
- Images and toHaveScreenshot best practice.petob asked on · 17 messages · resolved · AI answer
- Locator to look for a row with a time fieldtphillips8117 asked on · 0 messages · unresolved · AI answer
- axe & UI modeaustingil asked on · 0 messages · unresolved
- Want to start e2e testing in a project for workolrtg asked on · 2 messages · resolved · AI answer
- Error: strict mode violation thrown with typescript child element testpallavi9929 asked on · 0 messages · unresolved · AI answer
- Implementing a generic fixture to mock multiple apisaltamashali asked on · 1 messages · unresolved · AI answer
- Testing Backend Copy Changesconnnnnnnorl asked on · 2 messages · unresolved · AI answer
- API response redirect.jimbonicolesmith asked on · 3 messages · resolved
- Performance Testing in Playwright?doublez asked on · 18 messages · resolved
- integration with miragejswickynilliams asked on · 37 messages · unresolved
Rayrun is a community for QA engineers. I am constantly looking for new ways to add value to people learning Playwright and other browser automation frameworks. If you have feedback, email luc@ray.run.