Python-server workflow fixes + pytest (#17060)

* Fix referenced path for tests

* Explicit dependencies

Flask 2.3 has breaking changes

* Marks all async tests with pytest.mark.asyncio

Otherwise they are skipped by pytest and coverage is zero

* Fix path for pytest

On suggestion from https://github.com/OpenAPITools/openapi-generator/pull/17060#discussion_r1392666369

samples/server/petstore/python-aiohttp-srclayout/requirements.txt

@@ -1,4 +1,4 @@
-connexion[aiohttp,swagger-ui] >= 2.6.0; python_version>="3.6"
+connexion[aiohttp,swagger-ui] >= 2.6.0, <3; python_version>="3.6"
 # 2.3 is the last version that supports python 3.5
 connexion[aiohttp,swagger-ui] <= 2.3.0; python_version=="3.5" or python_version=="3.4"
 # connexion requires werkzeug but connexion < 2.4.0 does not install werkzeug
@@ -7,3 +7,4 @@ connexion[aiohttp,swagger-ui] <= 2.3.0; python_version=="3.5" or python_version=
 werkzeug == 0.16.1; python_version=="3.5" or python_version=="3.4"
 swagger-ui-bundle == 0.0.9
 aiohttp_jinja2 == 1.5.0
+Flask < 2.3

samples/server/petstore/python-aiohttp-srclayout/test_python3.sh

@@ -23,7 +23,7 @@ pip install -r $REQUIREMENTS_FILE | tee -a $REQUIREMENTS_OUT
 tox || exit 1
 
 ### static analysis of code
-flake8 --show-source petstore_api/
+flake8 --show-source ./src
 
 ### deactivate virtualenv
 if [ $DEACTIVE == true ]; then

samples/server/petstore/python-aiohttp-srclayout/tests/test_pet_controller.py

@@ -8,6 +8,7 @@ from aiohttp import FormData
 from openapi_server.models.api_response import ApiResponse
 from openapi_server.models.pet import Pet
 
+pytestmark = pytest.mark.asyncio
 
 @pytest.mark.skip("Connexion does not support multiple consumes. See https://github.com/zalando/connexion/pull/760")
 async def test_add_pet(client):

samples/server/petstore/python-aiohttp-srclayout/tests/test_store_controller.py

@@ -6,6 +6,7 @@ from aiohttp import web
 
 from openapi_server.models.order import Order
 
+pytestmark = pytest.mark.asyncio
 
 async def test_delete_order(client):
     """Test case for delete_order

samples/server/petstore/python-aiohttp-srclayout/tests/test_user_controller.py

@@ -6,6 +6,7 @@ from aiohttp import web
 
 from openapi_server.models.user import User
 
+pytestmark = pytest.mark.asyncio
 
 @pytest.mark.skip("*/* not supported by Connexion. Use application/json instead. See https://github.com/zalando/connexion/pull/760")
 async def test_create_user(client):

samples/server/petstore/python-aiohttp-srclayout/tox.ini

@@ -8,4 +8,4 @@ deps=-r{toxinidir}/requirements.txt
 	 {toxinidir}
 
 commands=
-   pytest --cov=src/openapi_server
+   pytest --cov=openapi_server