CODEWITHSUNDEEP
pythontestingpython-asyncio
Constantin De La Roche
Constantin De La Roche

Reputation: 3320

Using pytest fixture with asynctest

I am using asynctest and I want to leverage pytest fixture. I'm intersted by (but not only) the caplog fixture.

In an asynctest testing class, I can use with self.assertLogs(): but this is not sufficient when my logs are not produced within the block.

import asyncio
import logging
import asynctest


async def worker():
    logging.error(":(")


class TestClass(asynctest.TestCase):
    """Testing class. """

    async def setUp(self):
        self.worker_task = asyncio.ensure_future(worker())

    async def tearDown(self):
        try:
            self.worker_task.cancel()
        except asyncio.CancelledError:
            pass

    async def test_get_error_log(self):
        """ Simple test that assert logs emitted. """
        with self.assertLogs(level="ERROR") as cm:
            await asyncio.sleep(1)

The test above if failing but if I have:

---------- Captured log call -----------
ERROR    root:tmp.py:7 :(

Upvotes: 2

Views: 632

Answers (1)

Constantin De La Roche
Constantin De La Roche

Reputation: 3320

In fact asynctest is build on top of unittest and has nothing in common with the pytest testing framework.

So my own response is: for pytest fixtures, then use pytest instead of asynctest.

For the logging issue, it can be solved by getting and mocking the logging function.

    async def test_get_error_log(self):
        """ Simple test that assert logs emitted. """
        logging.error = asynctest.Mock()
        await asyncio.sleep(1)
        logging.error.assert_called_once_with(":(")

Upvotes: 1

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