Merge pull request #935 from DanielArndt/update-async-tests

#935

#### Description

As of Python 3.8, `AsyncMock` and many other async testing tools are available as standard libraries. This PR removes the third-party library `asynctest` and replaces it with those available in the standard python library.

As part of this, the tests will now run on Python 3.11, which they previously did not.

Additionally, warnings during tests are significantly reduced (from hundreds, to tens).

#### QA Steps

Running the unit and integration tests is hopefully sufficient

#### Notes & Discussion

I went down a rabbit hole here while investigating something totally unrelated. I understand if this change needs a more thorough review which there may or may not be time for, but I thought I'd put up the change since I was having some fun digging in.

tests/base.py

@@ -7,8 +7,6 @@
 from contextlib import contextmanager
 from pathlib import Path
 
-import mock
-
 import pytest
 from juju.client.jujudata import FileJujuData
 from juju.controller import Controller
@@ -147,11 +145,6 @@ def models(self):
         return all_models
 
 
-class AsyncMock(mock.MagicMock):
-    async def __call__(self, *args, **kwargs):
-        return super().__call__(*args, **kwargs)
-
-
 @contextmanager
 def patch_file(filename):
     """

tests/integration/test_application.py

@@ -16,7 +16,6 @@
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_action(event_loop):
     async with base.CleanModel() as model:
         app = await model.deploy('juju-qa-test')
@@ -26,7 +25,6 @@ async def test_action(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_get_set_config(event_loop):
     async with base.CleanModel() as model:
         app = await model.deploy(
@@ -51,7 +49,6 @@ async def test_get_set_config(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 @pytest.mark.skip('Update charm')
 async def test_status_is_not_unset(event_loop):
     async with base.CleanModel() as model:
@@ -66,7 +63,6 @@ async def test_status_is_not_unset(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 @pytest.mark.skip('Update charm')
 async def test_status(event_loop):
     async with base.CleanModel() as model:
@@ -82,7 +78,6 @@ def app_ready():
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 @pytest.mark.skip('Update charm')
 async def test_add_units(event_loop):
     from juju.unit import Unit
@@ -102,7 +97,6 @@ async def test_add_units(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_deploy_charmhub_charm(event_loop):
     async with base.CleanModel() as model:
         app = await model.deploy('ubuntu')
@@ -112,7 +106,6 @@ async def test_deploy_charmhub_charm(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 @pytest.mark.skip('Skip until a similar k8s solution is found')
 async def test_upgrade_charm_switch_channel(event_loop):
     # Note for future:
@@ -157,7 +150,6 @@ async def test_upgrade_charm_switch_channel(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 @pytest.mark.skip('Update charm')
 async def test_upgrade_charm_revision(event_loop):
     async with base.CleanModel() as model:
@@ -170,7 +162,6 @@ async def test_upgrade_charm_revision(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 @pytest.mark.skip('Update charm')
 async def test_upgrade_charm_switch(event_loop):
     async with base.CleanModel() as model:
@@ -185,7 +176,6 @@ async def test_upgrade_charm_switch(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_upgrade_local_charm(event_loop):
     async with base.CleanModel() as model:
         tests_dir = Path(__file__).absolute().parent
@@ -199,7 +189,6 @@ async def test_upgrade_local_charm(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_upgrade_local_charm_resource(event_loop):
     async with base.CleanModel() as model:
         tests_dir = Path(__file__).absolute().parent
@@ -219,7 +208,6 @@ async def test_upgrade_local_charm_resource(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_upgrade_charm_resource_same_rev_no_update(event_loop):
     async with base.CleanModel() as model:
         app = await model.deploy('keystone', channel='victoria/stable')
@@ -230,7 +218,6 @@ async def test_upgrade_charm_resource_same_rev_no_update(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_trusted(event_loop):
     async with base.CleanModel() as model:
         await model.deploy('ubuntu', trust=True)
@@ -245,7 +232,6 @@ async def test_trusted(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_app_destroy(event_loop):
     async with base.CleanModel() as model:
         app = await model.deploy('ubuntu')
@@ -261,7 +247,6 @@ async def test_app_destroy(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_app_remove_wait_flag(event_loop):
     async with base.CleanModel() as model:
         app = await model.deploy('ubuntu')
@@ -273,7 +258,6 @@ async def test_app_remove_wait_flag(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_app_charm_name(event_loop):
     async with base.CleanModel() as model:
         app = await model.deploy('ubuntu')

tests/integration/test_charmhub.py

@@ -9,7 +9,6 @@
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_info(event_loop):
     async with base.CleanModel() as model:
         _, name = await model.charmhub.get_charm_id("ubuntu")
@@ -31,7 +30,6 @@ async def test_info(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_info_with_channel(event_loop):
     async with base.CleanModel() as model:
         charm_info = await model.charmhub.info("juju-qa-test", "2.0/stable")
@@ -50,7 +48,6 @@ async def test_info_with_channel(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_info_not_found(event_loop):
     async with base.CleanModel() as model:
         with pytest.raises(JujuError) as err:
@@ -59,7 +56,6 @@ async def test_info_not_found(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 @pytest.mark.skip('CharmHub facade no longer exists')
 async def test_find(event_loop):
     async with base.CleanModel() as model:
@@ -72,7 +68,6 @@ async def test_find(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 @pytest.mark.skip('CharmHub facade no longer exists')
 async def test_find_bundles(event_loop):
     async with base.CleanModel() as model:
@@ -85,7 +80,6 @@ async def test_find_bundles(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 @pytest.mark.skip('CharmHub facade no longer exists')
 async def test_find_all(event_loop):
     async with base.CleanModel() as model:
@@ -98,7 +92,6 @@ async def test_find_all(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 @pytest.mark.skip('This tries to test juju controller logic')
 async def test_subordinate_charm_zero_units(event_loop):
     # normally in pylibjuju deploy num_units defaults to 1, we switch
@@ -126,15 +119,13 @@ async def test_subordinate_charm_zero_units(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_subordinate_false_field_exists(event_loop):
     async with base.CleanModel() as model:
         assert await model.charmhub.is_subordinate("rsyslog-forwarder-ha")
         assert not await model.charmhub.is_subordinate("mysql-innodb-cluster")
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_list_resources(event_loop):
     async with base.CleanModel() as model:
         resources = await model.charmhub.list_resources('hello-kubecon')

tests/integration/test_client.py

@@ -3,13 +3,10 @@
 
 from juju.client import client
 
-import pytest
-
 from .. import base
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_user_info(event_loop):
     async with base.CleanModel() as model:
         controller_conn = await model.connection().controller()

tests/integration/test_connection.py

@@ -25,7 +25,6 @@
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_monitor(event_loop):
     async with base.CleanModel() as model:
         conn = model.connection()
@@ -36,7 +35,6 @@ async def test_monitor(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_monitor_catches_error(event_loop):
 
     async with base.CleanModel() as model:
@@ -57,7 +55,6 @@ async def test_monitor_catches_error(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 @pytest.mark.skip('Update charm')
 async def test_full_status(event_loop):
     async with base.CleanModel() as model:
@@ -74,7 +71,6 @@ async def test_full_status(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_reconnect(event_loop):
     async with base.CleanModel() as model:
         kwargs = model.connection().connect_params()
@@ -90,7 +86,6 @@ async def test_reconnect(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 @pytest.mark.skip('tests the websocket protocol, not pylibjuju, needs to be revised')
 async def test_redirect(event_loop):
     controller = Controller()
@@ -238,7 +233,6 @@ def _find_free_port(self):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_verify_controller_cert(event_loop):
     jujudata = FileJujuData()
     controller_name = jujudata.current_controller()

tests/integration/test_controller.py

@@ -16,7 +16,6 @@
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_add_remove_user(event_loop):
     async with base.CleanController() as controller:
         username = 'test{}'.format(uuid.uuid4())
@@ -36,7 +35,6 @@ async def test_add_remove_user(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_disable_enable_user(event_loop):
     async with base.CleanController() as controller:
         username = 'test-disable{}'.format(uuid.uuid4())
@@ -60,7 +58,6 @@ async def test_disable_enable_user(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_change_user_password(event_loop):
     async with base.CleanController() as controller:
         username = 'test-password{}'.format(uuid.uuid4())
@@ -81,7 +78,6 @@ async def test_change_user_password(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_reset_user_password(event_loop):
     async with base.CleanController() as controller:
         username = 'test{}'.format(uuid.uuid4())
@@ -110,7 +106,6 @@ async def test_reset_user_password(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_list_models(event_loop):
     async with base.CleanController() as controller:
         async with base.CleanModel() as model:
@@ -119,7 +114,6 @@ async def test_list_models(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_get_model(event_loop):
     async with base.CleanController() as controller:
         by_name, by_uuid = None, None
@@ -153,7 +147,6 @@ async def _wait_for_model_gone(controller, model_name):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_destroy_model_by_name(event_loop):
     async with base.CleanController() as controller:
         model_name = 'test-{}'.format(uuid.uuid4())
@@ -169,7 +162,6 @@ async def test_destroy_model_by_name(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_add_destroy_model_by_uuid(event_loop):
     async with base.CleanController() as controller:
         model_name = 'test-{}'.format(uuid.uuid4())
@@ -186,7 +178,6 @@ async def test_add_destroy_model_by_uuid(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_add_remove_cloud(event_loop):
     async with base.CleanController() as controller:
         cloud_name = 'test-{}'.format(uuid.uuid4())
@@ -204,7 +195,6 @@ async def test_add_remove_cloud(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_secrets_backend_lifecycle(event_loop):
     """Testing the add_secret_backends is particularly
     costly in term of resources. This test sets a vault
@@ -282,7 +272,6 @@ async def test_secrets_backend_lifecycle(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_grant_revoke_controller_access(event_loop):
     async with base.CleanController() as controller:
         username = 'test-grant{}'.format(uuid.uuid4())
@@ -310,7 +299,6 @@ async def test_grant_revoke_controller_access(event_loop):
 
 
 @base.bootstrapped
-@pytest.mark.asyncio
 async def test_grant_revoke_model_access(event_loop):
     async with base.CleanController() as controller:
         username = 'test-grant{}'.format(uuid.uuid4())