aioredis.FakeRedis calls not being registered by pytest-cov

[silviumarcu]

Describe the bug
Calls made to async fakeredis client lead to lines, up to the next async method call, not being covered.

main.py

import fakeredis
import fakeredis.aioredis
import asyncio
import pytest

fake_client = fakeredis.aioredis.FakeRedis(server=fakeredis.FakeServer())

async def bar():
    await asyncio.sleep(2)
    print("bar")

async def foo():
    await fake_client.set("test_key", 1)
    await bar()
    cached_val = await fake_client.get("test_key")
    print(cached_val)
    print("foo")
    print("bar")
    print("foo")

@pytest.mark.asyncio
async def test_foo():
    await foo()

To Reproduce

• run python -m pytest --cov="." --cov-fail-under=100 --cov-report=term-missing -s -vv main.py
• notice that line containing await bar() and everything after cached_val = ... being marked as not covered
• the printed output is present in the console

Expected behavior
Full code coverage

Desktop (please complete the following information):

• OS: macOS Big Sur
• python version: 3.11.4
• redis-py version: 4.6.0
• full requirements.txt:

fakeredis
pytest
pytest-asyncio
pytest-cov
pytest-xdist

[Daniel M]

Adding the test:

async def test_coverage(req_aioredis2: redis.asyncio.Redis):
    async def bar():
        await asyncio.sleep(2)
        print("bar")

    async def foo():
        await req_aioredis2.set("test_key", 1)
        await bar()
        cached_val = await req_aioredis2.get("test_key")
        print(cached_val)
        print("foo")
        print("bar")
        print("foo")

    await foo()

I am getting full coverage, both for actual redis and fakeredis

[Daniel M]

@silviumarcu have you tried what I commented?

[silviumarcu]

@cunla req_aioredis2 fixture is not available (fixture 'req_aioredis2' not found). But looking at the source, I believe using something similar to test redis related code might help fix the issue.

Any chance of making the fixture available for external usage (e.g. having it in a conftest.py file)?

[Daniel M]

you can find it in the code: https://github.com/cunla/fakeredis-py/blob/master/test/test_redis_asyncio.py#L32-L63