[Feature]: Change testDir in the Playwright config to accept an array of paths

[alex-vukov]

🚀 Feature Request

Currently the testDir parameter in the playwright config file accepts a single path string (https://playwright.dev/docs/api/class-testconfig#test-config-test-dir). Making it an array will be of great benefit for use cases such as monorepos etc.

Example

Before:

export default defineConfig({
  testDir: './tests',
});

After:

export default defineConfig({
  testDir: ['dirA/tests', 'dirB/tests', 'dirC/tests'],
});

Motivation

In a monorepo setup where different parts of the application have their own test directories this will make it possible to run all tests at once when needed. At the moment it's not possible and a separate Playwright instance must be started for each sub-repo.

[yury-s]

As a workaround, you can set a common parent as testDir and then use testMatch with multiple entries to specify actual paths that should be included.

One issue with having multiple entries in testDir is to which one to use when computing relative path of a test in the test reports.

[alex-vukov]

Do you have any idea how I can make testMatch stop ignoring node_modules? I have a weird use case when I have to run tests from an npm package

[yury-s]

No easy solution at the moment, node_modules problem is tracked in #14303