fix(realtime): tolerate missing scoreboard channel layer

realtime/tests.py

@@ -1,3 +1,27 @@
-from django.test import TestCase
+from unittest.mock import Mock, patch
 
-# Create your tests here.
+from channels.exceptions import InvalidChannelLayerError
+from django.test import SimpleTestCase
+
+from realtime.broadcast import broadcast_phase_event, sync_broadcast_phase_event
+
+
+class BroadcastPhaseEventTests(SimpleTestCase):
+    @patch("realtime.broadcast.get_channel_layer", return_value=None)
+    async def test_broadcast_phase_event_noops_without_channel_layer(self, _mock_get_channel_layer):
+        await broadcast_phase_event("ABCD", "phase.scoreboard", {"phase": "scoreboard"})
+
+    @patch("realtime.broadcast.async_to_sync")
+    def test_sync_broadcast_phase_event_noops_when_channel_layer_is_unavailable(self, mock_async_to_sync):
+        mock_async_to_sync.return_value.side_effect = InvalidChannelLayerError("missing channel layer")
+
+        sync_broadcast_phase_event("ABCD", "phase.scoreboard", {"phase": "scoreboard"})
+
+    @patch("realtime.broadcast.async_to_sync")
+    def test_sync_broadcast_phase_event_still_broadcasts_when_channel_layer_exists(self, mock_async_to_sync):
+        sender = Mock()
+        mock_async_to_sync.return_value = sender
+
+        sync_broadcast_phase_event("ABCD", "phase.scoreboard", {"phase": "scoreboard"})
+
+        sender.assert_called_once_with("ABCD", "phase.scoreboard", {"phase": "scoreboard"})