tests: replace pytest-asyncio with anyio

Author: lealre

tests/conftest.py

@@ -12,13 +12,13 @@
 from src.models import table_register
 
 
-@pytest.fixture
+@pytest.fixture(scope='session')
 def anyio_backend():
     return 'asyncio'
 
 
 @pytest.fixture(scope='session')
-def postgres_container():
+def postgres_container(anyio_backend):
     with PostgresContainer('postgres:16', driver='asyncpg') as postgres:
         yield postgres
 

tests/test_routes.py

@@ -1,13 +1,10 @@
 from http import HTTPStatus
 
-import pytest
 from httpx import AsyncClient
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from src.models import Ticket
 
-pytestmark = pytest.mark.anyio
-
 
 async def test_get_all_tickets_success(
     async_session: AsyncSession, async_client: AsyncClient