speculative fixes for hardware speech.

tests/unit/test_hardware_speech_drivers.py

@@ -1,6 +1,7 @@
 import os
 import select
 import time
+from unittest.mock import ANY
 from unittest.mock import Mock
 
 import pytest
@@ -103,6 +104,48 @@ def test_litetalk_driver_writes_settings_and_cancel(serial_pair):
         speech_driver.shutdown()
 
 
+def test_auto_device_detection_includes_classic_serial(
+    monkeypatch, serial_pair
+):
+    master_fd, slave_name = serial_pair
+
+    def fake_glob(pattern):
+        if pattern == "/dev/ttyS*":
+            return [slave_name]
+        return []
+
+    monkeypatch.setattr(
+        "fenrirscreenreader.speechDriver.hardwareSerialDriver.glob.glob",
+        fake_glob,
+    )
+    speech_driver = litetalkDriver.driver()
+    speech_driver.initialize(build_environment("auto"))
+    try:
+        assert speech_driver.device == slave_name
+        speech_driver.speak("Serial")
+        assert read_available(master_fd, 7) == b"Serial\r"
+    finally:
+        speech_driver.shutdown()
+
+
+def test_auto_device_detection_fails_when_no_serial_device(monkeypatch):
+    monkeypatch.setattr(
+        "fenrirscreenreader.speechDriver.hardwareSerialDriver.glob.glob",
+        lambda pattern: [],
+    )
+    speech_driver = litetalkDriver.driver()
+
+    with pytest.raises(RuntimeError, match="hardware speech device"):
+        speech_driver.initialize(build_environment("auto"))
+
+    debug_manager = speech_driver.env["runtime"]["DebugManager"]
+    debug_manager.write_debug_out.assert_called_with(
+        "Hardware speech device not found",
+        ANY,
+        on_any_level=True,
+    )
+
+
 @pytest.mark.parametrize("driver_class", [doubletalkDriver, tripletalkDriver])
 def test_litetalk_compatible_alias_drivers(driver_class, serial_pair):
     speech_driver, master_fd = initialized_driver(driver_class, serial_pair)