Playwright

Introduction

Playwright is an end-to-end testing framework. It offers a single API to automate Chromium, Firefox, and WebKit browsers, enabling you to:

Auto‑wait for UI elements to be ready
Launch and manage multiple browser contexts
Intercept and mock network requests
Run tests in parallel with built‑in workers
Capture detailed traces, screenshots, and videos for debugging

In Playwright, workers are used for parallel execution of tests. It manages the distribution of test files across multiple worker worker processes so that tests can run concurrently without interfering with each other

The concept of a worker in Playwright is built into Playwright - it's not just leveraging a general JavaScript feature

JavaScript Workers vs Playwright Workers:

In the broader JavaScript ecosystem, there are features like Web Workers or Worker Threads in Node.js, which are used to perform tasks in parallel threads. However, these are primarily used for concurrent execution of code within a single application.
Playwright's workers are more about orchestrating entire test processes. Each worker runs in its own process, which can include its own browser instance, isolated environment, and resources.

To implement a screenshot library that uses Playwright, we needed to use a worker-scoped fixture. Again, a worker is a process that runs your tests. A fixture is a piece of setup code that is used to prepare your environment for your tests (e.g. set up databases, start servers, etc). Worker-scoped fixtures are set up once per worker process and shared across all the tests running in the worker.

more on Playwright fixtures

Introduction​

Recommended Topics​

Introduction

Recommended Topics