lobby/tests.py

@@ -2,6 +2,7 @@ import json
 import tempfile
 from datetime import timedelta
 from pathlib import Path
+from unittest.mock import patch
 
 from django.contrib.auth import get_user_model
 from django.core.management import call_command
@@ -1218,6 +1219,23 @@ class I18nResolverTests(TestCase):
     def test_missing_backend_key_returns_key_deterministically(self):
         self.assertEqual(resolve_error_message(key="missing_key", locale="da"), "missing_key")
 
+    def test_missing_backend_key_is_logged_with_context(self):
+        with self.assertLogs("lobby.i18n", level="WARNING") as logs:
+            result = resolve_error_message(key="missing_key", locale="da")
+
+        self.assertEqual(result, "missing_key")
+        self.assertTrue(any("i18n key missing in shared catalog" in entry for entry in logs.output))
+
+    def test_missing_locale_translation_falls_back_to_default_locale(self):
+        with patch(
+            "lobby.i18n.lobby_i18n_error_messages",
+            return_value={"session_code_required": {"en": "Session code is required"}},
+        ):
+            self.assertEqual(
+                resolve_error_message(key="session_code_required", locale="da"),
+                "Session code is required",
+            )
+
     def test_shared_catalog_uses_en_default_and_da_en_matrix(self):
         default_locale, supported_locales = i18n_locale_config()
         catalog = lobby_i18n_catalog()