fix: add SIGKILL fallback when SIGTERM does not stop the alarm

tests/test_api.py

@@ -2,6 +2,7 @@ from unittest.mock import patch, MagicMock
 from fastapi.testclient import TestClient
 import tempfile
 import os
+import signal
 
 # We need to set the environment variable before importing the app
 os.environ["API_KEY"] = "test-secret"
@@ -295,14 +296,38 @@ def test_start_ringing_ignores_when_already_ringing():
         mock_popen.assert_not_called()
 
 
-def test_stop_ringing_kills_process_when_ringing():
-    """stopRinging returns True and kills the process when ringing."""
+def test_stop_ringing_sends_sigterm_when_ringing():
+    """stopRinging sends SIGTERM and cleans up the PID file."""
     from api.schema import Mutation
 
     mutation = Mutation()
 
     with patch("api.schema.is_wecker_ringing", return_value=True), \
          patch("api.schema.os.kill") as mock_kill, \
+         patch("api.schema.os.path.exists", return_value=True), \
+         patch("api.schema.os.remove") as mock_remove, \
+         patch("common.PID_FILE", "/tmp/fake_wecker.pid"), \
+         patch("builtins.open") as mock_open:
+        mock_f = mock_open.return_value.__enter__.return_value
+        mock_f.read.return_value = "1234"
+        mock_kill.side_effect = [None, ProcessLookupError]
+        result = mutation.stop_ringing()
+        assert result is True
+        mock_kill.assert_any_call(1234, signal.SIGTERM)
+        mock_remove.assert_called_once()
+
+
+def test_stop_ringing_falls_back_to_sigkill():
+    """stopRinging escalates to SIGKILL if SIGTERM does not terminate the process."""
+    from api.schema import Mutation
+
+    mutation = Mutation()
+
+    with patch("api.schema.is_wecker_ringing", return_value=True), \
+         patch("api.schema.os.kill") as mock_kill, \
+         patch("api.schema.time.sleep"), \
+         patch("api.schema.os.path.exists", return_value=True), \
+         patch("api.schema.os.remove"), \
          patch("common.PID_FILE", "/tmp/fake_wecker.pid"), \
          patch("builtins.open") as mock_open:
         mock_f = mock_open.return_value.__enter__.return_value
@@ -310,7 +335,9 @@ def test_stop_ringing_kills_process_when_ringing():
         mock_kill.return_value = None
         result = mutation.stop_ringing()
         assert result is True
-        mock_kill.assert_called_with(1234, 15)
+        signals_sent = [call_args[0][1] for call_args in mock_kill.call_args_list]
+        assert signal.SIGTERM in signals_sent
+        assert signal.SIGKILL in signals_sent
 
 
 def test_stop_ringing_does_nothing_when_not_ringing():