fix: restore speech dispatcher interruption

tests/test_speechdispatcher_interrupt_regressions.py

@@ -0,0 +1,43 @@
+import sys
+import time
+import unittest
+from pathlib import Path
+from unittest import mock
+
+sys.path.insert(0, str(Path(__file__).resolve().parents[1] / "src"))
+
+from cthulhu import speechdispatcherfactory
+
+
+class SpeechDispatcherInterruptRegressionTests(unittest.TestCase):
+    def _make_server(self):
+        server = speechdispatcherfactory.SpeechServer.__new__(speechdispatcherfactory.SpeechServer)
+        server._lastKeyEchoTime = None
+        server._cancel = mock.Mock()
+        server._apply_acss = mock.Mock()
+        server._send_command = mock.Mock()
+        server._speak = mock.Mock()
+        server._client = mock.Mock()
+        server._client.char = mock.Mock()
+        return server
+
+    def test_interrupting_string_speech_cancels_active_output_first(self):
+        server = self._make_server()
+
+        server.speak("long utterance", interrupt=True)
+
+        server._cancel.assert_called_once_with()
+        server._speak.assert_called_once_with("long utterance", None)
+
+    def test_recent_key_echo_suppresses_backend_cancel(self):
+        server = self._make_server()
+        server._lastKeyEchoTime = time.time()
+
+        server.speak("next", interrupt=True)
+
+        server._cancel.assert_not_called()
+        server._speak.assert_called_once_with("next", None)
+
+
+if __name__ == "__main__":
+    unittest.main()