version 1.0.0 - celery tasks not executed inside tests

[ARROM2405]

Since updating pytest-celery to version 1.0.0 I cannot get async celery tasks to be executed in test.

...
@pytest.fixture(autouse=True)
    def setUp(self, transactional_db):
          ...

@shared_task
def some_celery_task(a, b):
    return a + b

@pytest.mark.celery(task_always_eager=True)
def test_celery_task(
    self,
    celery_app,
    celery_worker,
):
    res = some_celery_task.apply_async((2, 3))
    res.collect()

When I checked what celery apps are used in the test I see that application created by the celery_app fixture, app used for the celery_worker fixture, app for the task and app used for my project are all different apps.

(
<Celery ecomm at 0x109eb6f30>,
<Celery celery.tests at 0x113bdbc20>, 
<Celery celery_test_app at 0x113c50c20>, 
<Celery celery_test_app at 0x113bd86e0>
)

I do not have any custom setup for the pytest related to the celery.

[ARROM2405]

Accidentally I figured out that this way test works. As you can see, I had to explicitly set celery_app created by the fixture as current, and remove celery_worker fixture. This way the task was executed. (I changed the test a little bit, but those changes have no effect on the issue itself.)

    @pytest.mark.celery(task_always_eager=True)
    def test_celery_task(
        self,
        celery_app,
    ):
        celery_app.set_current()

        res = some_celery_task.apply_async((2, 3), queue="celery")
        a = res.get()
        assert a == 5 

[Nusnus]

@pytest.mark.celery(task_always_eager=True)
def test_celery_task(
    self,
    celery_app,
    celery_worker,
):
    res = some_celery_task.apply_async((2, 3))
    res.collect()

The celery_worker is not compatible with the v0.0.0 API.

Basically, the v0.0.0 testing infrastructure is in celery. The v1.0.0 is a new framework, to which celery_worker belongs, that is based on the source code of the pytest-celery repo itself.

So it appears you were trying to include a fixture from the new framework, into a test that is using the v0.0.0 infra which is why there were conflicts.

celery_app.set_current()

However, this shouldn’t be needed if you remove the celery_worker fixture.

P.S
I know it’s a bit confusing, but that’s how it works right now.

Closing this issue - let me know if it needs reopening.