What is the scope of a variable defined in the beforeAll hook in Playwright Test API?


Sure, you can use variables defined in the beforeAll hook in beforeEach and test sections when using @playwright/test. The beforeAll hook runs once per worker process before all tests. If you define a variable here, it's available throughout the file.

Here's a simple example:

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

let myVariable;

test.beforeAll(() => {
  myVariable = 'Hello, Playwright!';

test.beforeEach(() => {
  console.log(myVariable); // Outputs: 'Hello, Playwright!'

test('My Test', async ({ page }) => {
  await page.goto('https://ray.run/');
  console.log(myVariable); // Outputs: 'Hello, Playwright!'

Remember, if you use test.describe() to group tests, the hooks only run for tests in that group. Also, if a worker process fails, it restarts and re-initializes any beforeAll variables. But don't worry, this doesn't affect their availability in other code sections.

Just be careful not to redefine or modify these variables in other code blocks or functions. Happy testing with Playwright!


Thank you!
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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.