Add tests for Netatmo oauth2 api (#46375)

* Add Netatmo tests for api

* Update tests/components/netatmo/test_api.py

* Update .coveragerc

Co-authored-by: Erik Montnemery <erik@montnemery.com>

.coveragerc

@@ -644,7 +644,6 @@ omit =
     homeassistant/components/nello/lock.py
     homeassistant/components/nest/legacy/*
     homeassistant/components/netatmo/__init__.py
-    homeassistant/components/netatmo/api.py
     homeassistant/components/netatmo/camera.py
     homeassistant/components/netatmo/data_handler.py
     homeassistant/components/netatmo/helper.py

tests/components/netatmo/test_api.py

@@ -0,0 +1,14 @@
+"""The tests for the Netatmo oauth2 api."""
+from unittest.mock import patch
+
+from homeassistant.components.netatmo import api
+
+
+async def test_api(hass, config_entry):
+    """Test auth instantiation."""
+    with patch(
+        "homeassistant.helpers.config_entry_oauth2_flow.async_get_config_entry_implementation",
+    ) as fake_implementation:
+        auth = api.ConfigEntryNetatmoAuth(hass, config_entry, fake_implementation)
+
+    assert isinstance(auth, api.ConfigEntryNetatmoAuth)