Fix tests

tests/conftest.py

@@ -1,8 +1,19 @@
 """pytest fixtures."""
+from unittest.mock import patch
+
 import pytest
 
+from custom_components.birthdays import Translation
+
 
 @pytest.fixture(autouse=True)
 def auto_enable_custom_integrations(enable_custom_integrations):
     """Enable custom integrations defined in the test dir."""
     yield
+
+
+@pytest.fixture(autouse=True)
+def mock_translations():
+    translation = Translation(single_day_unit='day', multiple_days_unit='days')
+    with patch("custom_components.birthdays._get_translation", return_value=translation, autospec=True) as m:
+        yield m