Speedtestdotnet code cleanup and type hints (#52533)

tests/components/speedtestdotnet/conftest.py

@@ -0,0 +1,16 @@
+"""Conftest for speedtestdotnet."""
+from unittest.mock import patch
+
+import pytest
+
+from tests.components.speedtestdotnet import MOCK_RESULTS, MOCK_SERVERS
+
+
+@pytest.fixture(autouse=True)
+def mock_api():
+    """Mock entry setup."""
+    with patch("speedtest.Speedtest") as mock_api:
+        mock_api.return_value.get_servers.return_value = MOCK_SERVERS
+        mock_api.return_value.get_best_server.return_value = MOCK_SERVERS[1][0]
+        mock_api.return_value.results.dict.return_value = MOCK_RESULTS
+        yield mock_api