What are some tips for using pytest-asyncio?

What are some tips for using pytest-asyncio?

Here are a few tips for using pytest-asyncio effectively:

1. Use @pytest.mark.asyncio to mark your test functions as asynchronous.
2. Make sure to use await for any asynchronous calls within your tests.
3. Utilize fixtures to set up your async environment and dependencies.
4. Keep your tests isolated to avoid side effects.

Can you explain how to use fixtures with pytest-asyncio?

Certainly! You can define async fixtures using the @pytest.fixture decorator with async def. For example:

import pytest

@pytest.fixture
async def async_fixture():
    # Setup code here
    yield result
    # Teardown code here

Then, you can use this fixture in your async test functions by including it as a parameter.

What should I do if my tests are running too slowly?

If your tests are running slowly, consider the following:

1. Optimize your async code to reduce latency.
2. Use pytest-xdist to run tests in parallel.
3. Profile your tests to identify bottlenecks.
4. Avoid unnecessary I/O operations in your tests.

Are there any common pitfalls to avoid?

Yes, some common pitfalls include:

1. Forgetting to use await for async calls, which can lead to unexpected behavior.
2. Mixing synchronous and asynchronous code without proper handling.
3. Not properly cleaning up resources in fixtures, which can cause tests to interfere with each other.