pytest_subprocess.asyncio_subprocess has no attribute 'DEVNULL'

[jranieri-grammatech]

fake_process appears to be incompatible with code that uses asyncio.subprocess.DEVNULL.

Example test:

def test_devnull(fake_process):
    async def impl():
        process = await asyncio.create_subprocess_exec(
            "cat",
            stdin=oasyncio.subprocess.DEVNULL,
            stdout=asyncio.subprocess.PIPE,
            stderr=asyncio.subprocess.PIPE,
        )

    fake_process.register_subprocess("cat")
    asyncio.get_event_loop().run_until_complete(impl())

Output:

E       AttributeError: module 'pytest_subprocess.asyncio_subprocess' has no attribute 'DEVNULL'

From looking at asyncio_subprocess.py, my guess would be that DEVNULL needs to be imported here (and probably STDOUT too) .

[aklajnert]

Thanks for the report, this one was easy so I've fixed it immediately.