Answer

Running Playwright Scripts in Parallel with Unique Login Credentials

You can run Playwright scripts in parallel with each worker using unique login credentials and reuse them for subsequent tests. Here's how:

Set Up a Worker-Scoped Fixture

First, define a worker-scoped fixture in your test setup file. This fixture is responsible for authenticating and storing the login credentials for each worker.

import { test } from '@playwright/test';

test('worker-scoped fixture', async ({ workerStorageState }) => {
  // your code here
});

Generate a Unique Identifier

Use the parallelIndex provided by Playwright Test to generate a unique identifier for each worker. This identifier is used to create a separate storage file for each worker.

const parallelIndex = test.parallelIndex;

Check if Authentication State Exists

Before authenticating, check if an authentication state file already exists for the current worker. If it does, reuse the existing state by loading it into the browser or context.

Authenticate in a Clean Environment

To ensure authentication is performed in a clean environment, unset any existing storage state before authenticating. Create a new browser context or page with storageState set to undefined.

Acquire Unique Account Credentials

Obtain unique account credentials for each worker either by creating new accounts or using precreated accounts specifically designed for testing purposes.

Perform Authentication Steps

Replace the example authentication steps provided in the context with your own actions based on your application's login flow.

Store Authentication State

After successful authentication, store the current storage state into a file specific to that worker. This allows you to reuse this stored state across multiple tests executed by that particular worker.

Dispose of Resources

Once authentication is complete and storage state is saved, dispose of any resources created during this process.

Reuse Authentication State for Subsequent Tests

In each test that requires authentication, load the stored authentication state file from the worker-scoped fixture. This ensures that subsequent tests executed by the same worker can reuse the same login credentials.

By following these steps, you can run Playwright scripts in parallel with each worker using unique login credentials and reuse them for subsequent tests. This approach allows multiple team members to run tests simultaneously without interference and ensures a clean environment for each authentication process.