pytest-cov doesn't work when sync_playwright is active

Hi. Love the project. Found an oddity, thought I should report it.

pytest-cov coverage doesn’t appear to be collected when sync_playwright is active.

I’m using the following versions: playwright 0.162.1 pytest 6.1.2 pytest-cov 2.10.1 Recreated on python 3.9, 3.8, 3.7.

Here’s the minimal reproduction:

import playwright
import pytest

def test_playwright_breaks_coverage():
    print('coverage works here')

    with playwright.sync_playwright() as p:
        print('but coverage doesnt work here')

        browser = p.chromium.launch(headless=True)
        try:
            page = browser.newPage()
            page.setViewportSize(1024, 768)
            page.goto('https://google.com')
        finally:
            browser.close()

        print('or here')

    print('coverage works here')

Run with python -m pytest test_playwright_breaks_coverage.py --cov-report=html --cov=test_playwright_breaks_coverage

[dcrowe]

Magnificent. It worked like a charm.

Add the following settings to .coveragerc in the project directory:

[run]
concurrency = greenlet

[dcrowe]

Thank you for your help.