剧作家：是否可以仅指定 worker 数量或浏览器以进行 1 次测试？

Question

I have my suite set up to run against 4 browsers using 3 workers (2 desktops and 2 mobile) I have a test that I need to either not run in parallel or limit to just run in one desktop browser.

Is that possible?

The reason I need to do this is that the test is triggering an event that can take a few seconds to run, when running nobody else can start this event so if 3 tests are running at once only the first one can pass. Also, on mobile, you can't trigger the event, so I skip parts of the test if isMobile is true.

Ideally, I'd like to just run this test in Firefox and leave the rest of the suite running in 3 workers with 4 browsers.

I looked at test.describe.configure({ mode: 'serial' }); but that doesn't seem to make a difference I still see

Running 4 tests using 3 workers

when I try just running this single spec file.

Answer 1

To change the parallelism you have to have a look at the workers config . You can either define it via playwright.config.js or the command line.

What we do at work is to separate commands based on directory or custom annotations.

{
  "name": "parallel",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test:parallel": "npx playwright test tests/parallel/",
    "test:sequence": "npx playwright test tests/sequence/ --workers=1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "@playwright/test": "^1.29.2"
  }
}

This way you can configure only subsets of tests that run in parallel whereas others run sequentially.

And funnily, I also recorded a video on the topic not too long ago .