Coverage with subproprocess Popen and async code

[gilcu2]

Summary

TCP server on trio running from a fixture:

@pytest.fixture(scope="session")
def server() -> Generator:
    server_proc = subprocess.Popen(
        [
            sys.executable,
            "src/server.py",
        ],
        stdout=subprocess.PIPE,
        stderr=subprocess.STDOUT,
    )
    time.sleep(0.1)
    assert not server_proc.poll()
    assert "TCP listening on 1234" in server_proc.stdout.read().decode("utf-8")  # type: ignore
    yield server_proc
    server_proc.terminate()

The sync lines of server.py get coverage but the async no. I have tried several combination like:

• concurrency = ["greenlet"]
• concurrency = ["thread","gevent"]
• concurrency = ["greenlet", "thread"]

but don't get the coverage

Expected vs actual result

Async lines covered. I know they run because I have log feedback

Reproducer

Versions

python = "^3.11" anyio = { extras = ["trio"], version = "^4.0.0" } pytest = "^7.4.0" pytest-cov = "^4.1.0"

Config

[tool.coverage.run]

concurrency = ["greenlet"]

concurrency = ["thread","gevent"]

concurrency = ["greenlet", "thread"]

sigterm = "true"

[ionelmc]

I think a more complete reproducer is required here.

[gilcu2]

Hi sorry. Was my fault. The server under pytest was not running because the same server was running alone in the same port.