playwright

 There is a web site need to run with browser. and which has zero downtime and alert and notifications pop up too. Third party applications are involved in and need to fix bugs too.What is the solution and how to create a framework for this scenario : need to use playwright as well 1. Understand the Requirements and Challenges: Zero Downtime: Ensure tests do not interrupt the service. Alerts and Notifications: Handle unexpected pop-ups gracefully. Third-Party Integrations: Test interactions with third-party services. Bug Fixing: Implement a process to identify and log bugs efficiently. 2. Set Up the Playwright Framework: Installation: Ensure Playwright is installed and configured. bash Copy code npm install playwright 3. Structure the Test Framework: Test Suites: Organize tests into suites (e.g., smoke tests, regression tests, integration tests). Page Object Model (POM): Use POM to manage page elements and actions. Configuration: Set up configurations for different envir...

 Using a mock server in end-to-end (E2E) testing is indeed common, and it can be used for more than just reading values. Mock servers simulate the behavior of real servers and can handle various HTTP methods, including POST , PUT , DELETE , and PATCH , in addition to GET . This means you can use a mock server to simulate interactions that involve writing data, such as filling out and submitting forms. Automating Form Interactions with Mock Servers Simulating Form Submissions : Mock servers can be set up to handle form submissions. When you submit a form in your E2E test, the mock server can capture the request and respond with a predefined response. Validating Data : You can use the mock server to validate the data sent by your application. The mock server can check if the request body matches the expected format and values. Response Handling : After submitting a form, your application typically processes the server's response. The mock server can provide specific responses to test...

  Playwright Test runs tests from a single file in the order of declaration, unless you  parallelize tests in a single file . There is no guarantee about the order of test execution across the files, because Playwright Test runs test files in parallel by default. However, if you  disable parallelism , you can control test order by either naming your files in alphabetical order or using a "test list" file. Sort test files alphabetically ​ When you  disable parallel test execution , Playwright Test runs test files in alphabetical order. You can use some naming convention to control the test order, for example  001-user-signin-flow.spec.ts ,  002-create-new-document.spec.ts  and so on.

 In Playwright, a fixture refers to a predefined setup or configuration that provides the context for your tests. Fixtures are used to define the environment in which tests run, ensuring that necessary prerequisites are in place before the execution of each test or suite of tests. Fixtures can include actions like launching a browser, setting up test data, initializing objects, or any other setup needed to ensure consistent and reliable test execution. Key Concepts of Fixtures in Playwright Setup and Teardown : Fixtures handle the setup and teardown processes, making sure that the environment is correctly prepared before a test runs and cleaned up afterward. Isolation : Fixtures help isolate tests from each other, ensuring that tests do not interfere with one another by sharing the same state or data. Reusable Configurations : Fixtures allow for the reuse of common setups across multiple tests, reducing redundancy and making the test code cleaner and more maintainable. Normally, i...

  How Timeout Values Are Applied Global Timeout in Config : The timeout value in playwright.config.ts sets a default timeout for all expect assertions if no specific timeout is provided in the test script. Local Timeout in Tests : If a specific timeout is provided in a test script, it overrides the global timeout for that particular step or assertion. Determining the Actual Timeout Global Timeout Only : If you only set the global timeout in the playwright.config.ts file, the timeout for each expect assertion will be the global timeout value (e.g., 5000 milliseconds in the example). Local Timeout Only : If you set a timeout for a specific step in your test script, that value will be used for that particular step (e.g., 10000 milliseconds in the example). Both Global and Local Timeout : When both global and local timeouts are set, the local timeout takes precedence for the specific step or assertion. The global timeout will apply to other steps or assertions without a specific t...

 Selenium and Playwright are both popular tools for automating web browser interactions, but they have distinct features and capabilities. Here’s a comparison between Selenium and Playwright across several key aspects: 1. Browser Support Selenium : Supports a wide range of browsers including Chrome, Firefox, Safari, Edge, and others. Each browser requires its own driver (e.g., ChromeDriver for Chrome). Playwright : Initially developed by Microsoft, Playwright supports Chromium, Firefox, and WebKit (Safari). It provides consistent API across all browsers without needing separate drivers. 2. Language Support Selenium : Supports multiple programming languages such as Java, Python, JavaScript (Node.js), C#, Ruby, and others through Selenium WebDriver bindings. Playwright : Provides native support for JavaScript (Node.js), TypeScript, Python, and C#. It offers a clean and modern API for each language. 3. API and Features Selenium : Provides a mature and widely adopted API (WebDriver) fo...

All tests run in worker processes. These processes are OS processes, running independently, orchestrated by the test runner. All workers have identical environments and each starts its own browser. You can't communicate between the workers. Playwright Test reuses a single worker as much as it can to make testing faster, so multiple test files are usually run in a single worker one after another. Workers are always shutdown after a  test failure  to guarantee pristine environment for following tests.   Note that parallel tests are executed in separate worker processes and cannot share any state or global variables. Each test executes all relevant hooks just for itself, including  beforeAll  and  afterAll . In Playwright, the concept of workers refers to dedicated contexts for executing JavaScript code in isolation from the main browser context. Workers are commonly used for scenarios where you need to run scripts concurrently or offload heavy computations wi...

 In the context of Playwright, understanding how pages and browser contexts work is crucial for managing test isolation and ensuring reliable test execution. Here’s an explanation: Browser Context in Playwright Definition : A browser context in Playwright is akin to a new browser profile. Each browser context provides a separate environment where cookies, local storage, and other session data are isolated from other contexts. Isolation Between Tests : When you run tests using Playwright, each test typically operates within its own browser context. This means that: Fresh Environment : Every test starts with a clean slate, ensuring that any changes made by one test (such as cookies or session data) do not affect subsequent tests. Consistent State : Tests are independent of each other in terms of state, which helps in avoiding interference between different test cases. Page Isolation : Within each browser context, individual pages (created using page objects in Playwright) are also i...

  async and await are features in JavaScript (and TypeScript) that work together to simplify asynchronous code and make it look more like synchronous code. Here's a clear explanation of each: async Function The async keyword is used to define asynchronous functions. An async function is a function that operates asynchronously via the event loop, allowing other code to run in parallel while waiting for the asynchronous operation to complete. Syntax : An async function is declared using the async keyword before the function declaration. javascript Copy code async function fetchData ( ) { // Async operations go here } Return Value : Async functions always return a Promise. If a value is explicitly returned from within the function, the Promise will resolve with that value. If an exception is thrown, the Promise will be rejected with the thrown value. Usage : Async functions are typically used when dealing with asynchronous operations such as fetching data from a server, rea...

  Summary Definition : A flaky test is a test that passes and fails intermittently without changes to the environment or codebase. Causes : Common causes include timing issues, race conditions, external dependencies, shared state, resource constraints, and environment differences. Handling Flaky Tests : Use isolation, retries, stabilization, mocking, environment parity, and resource management to reduce flakiness. Example : Adding retries and proper waits in Playwright to handle flaky tests. By understanding and addressing the causes of flaky tests, you can improve the reliability of your test suite and ensure more consistent test results. How to Handle Flaky Tests Isolation : Ensure each test is independent and doesn't rely on shared state or other tests. Retries : Implement retry logic in your test runner to re-run flaky tests automatically. Example: In Playwright, you can configure retries in the playwright.config.ts file: typescript Stabilization : Add proper waits and timeout...

 In Playwright, you can tag and categorize your tests to better manage and filter them. This is particularly useful for organizing large test suites and running specific subsets of tests based on tags. Here’s a detailed explanation and examples: Tagging Tests You can tag tests in Playwright using either the test title or by providing an additional details object when declaring a test. Tagging by Test Title You can add tags directly in the test title using the @ symbol. Tags must start with the @ symbol. typescript Copy code import { test, expect } from '@playwright/test' ; test ( 'Login functionality @smoke' , async ({ page }) => { // test code }); test ( 'Add to cart functionality @regression' , async ({ page }) => { // test code }); test ( 'Checkout process @regression @slow' , async ({ page }) => { // test code }); Tagging with Details Object You can also provide tags using an additional details object when declaring ...