""" Tests for evdev keyboard backend. This module tests: - find_keyboard_devices() function - device_has_modifier_key() function - EvdevKeyboardBackend class initialization - start() and stop() methods - is_available() and get_permission_hint() - _handle_key_event() method - _monitor_devices() thread """ import errno import os import threading import time from unittest.mock import MagicMock, Mock, mock_open, patch import pytest from vocalinux.ui.keyboard_backends.evdev_backend import ( DEVICE_RESCAN_SECONDS, EVDEV_AVAILABLE, MODIFIER_KEY_CODES, EvdevKeyboardBackend, device_has_key, device_has_modifier_key, find_keyboard_devices, ) class TestFindKeyboardDevices: """Test find_keyboard_devices() function.""" def test_find_keyboard_devices_no_devices(self): """Test when no keyboard devices are found.""" mock_proc_content = """I: Bus=0011 Vendor=0001 Product=0001 Version=ab83 N: Name="Power Button" H: Handlers= """ with patch("builtins.open", mock_open(read_data=mock_proc_content)): with patch("os.path.exists", return_value=False): result = find_keyboard_devices() assert result == [] def test_find_keyboard_devices_single_device(self): """Test finding a single keyboard device.""" mock_proc_content = """I: Bus=0011 Vendor=0001 Product=0001 Version=ab83 N: Name="AT Translated Set 2 keyboard" H: Handlers=sysrq kbd event0 B: KEY=10000 7ff 202100 3953b001 68ffe0 1 20000 2000000000000 0 """ with patch("builtins.open", mock_open(read_data=mock_proc_content)): with patch("os.path.exists", return_value=True): result = find_keyboard_devices() assert "/dev/input/event0" in result def test_find_keyboard_devices_multiple_devices(self): """Test finding multiple keyboard devices.""" mock_proc_content = """I: Bus=0011 Vendor=0001 Product=0001 Version=ab83 N: Name="AT Translated Set 2 keyboard" H: Handlers=sysrq kbd event0 B: KEY=10000 7ff 202100 3953b001 68ffe0 1 20000 2000000000000 0 I: Bus=0018 Vendor=04f3 Product=0033 Version=0500 N: Name="Elan Touchpad" H: Handlers=mouse0 event1 B: KEY=ff000000000000 0 0 0 """ with patch("builtins.open", mock_open(read_data=mock_proc_content)): with patch("os.path.exists", return_value=True): result = find_keyboard_devices() # Should find event0 (has KEY capability) assert len(result) >= 1 def test_find_keyboard_devices_io_error(self): """Test error handling when /proc/bus/input/devices cannot be read.""" with patch("builtins.open", side_effect=IOError("Permission denied")): with patch( "vocalinux.ui.keyboard_backends.evdev_backend._find_keyboard_devices_from_evdev", return_value=[], ): result = find_keyboard_devices() assert result == [] def test_find_keyboard_devices_file_not_found(self): """Test error handling when /proc/bus/input/devices doesn't exist.""" with patch("builtins.open", side_effect=FileNotFoundError()): with patch( "vocalinux.ui.keyboard_backends.evdev_backend._find_keyboard_devices_from_evdev", return_value=[], ): result = find_keyboard_devices() assert result == [] def test_find_keyboard_devices_falls_back_to_evdev_list(self): """When /proc is denied (e.g. snap), discover keyboards via list_devices.""" with patch("builtins.open", side_effect=PermissionError(13, "Permission denied")): with patch( "vocalinux.ui.keyboard_backends.evdev_backend._find_keyboard_devices_from_evdev", return_value=["/dev/input/event10"], ) as fallback: result = find_keyboard_devices() assert result == ["/dev/input/event10"] fallback.assert_called_once() def test_find_keyboard_devices_no_keyboard_capability(self): """Test filtering devices without keyboard capability.""" mock_proc_content = """I: Bus=0019 Vendor=0000 Product=0003 Version=0000 N: Name="Power Button" H: Handlers=power kbd event2 B: KEY=0 """ with patch("builtins.open", mock_open(read_data=mock_proc_content)): result = find_keyboard_devices() # Device with KEY=0 should not be included assert "/dev/input/event2" not in result def test_find_keyboard_devices_no_event_handler(self): """Test filtering devices without event handler.""" mock_proc_content = """I: Bus=0011 Vendor=0001 Product=0001 Version=ab83 N: Name="Device with no event" H: Handlers=kbd B: KEY=10000 7ff 202100 3953b001 68ffe0 1 20000 2000000000000 0 """ with patch("builtins.open", mock_open(read_data=mock_proc_content)): result = find_keyboard_devices() # Device without eventX handler should not be included assert result == [] def test_find_keyboard_devices_device_not_exists(self): """Test filtering devices that don't actually exist in /dev/input.""" mock_proc_content = """I: Bus=0011 Vendor=0001 Product=0001 Version=ab83 N: Name="AT Translated Set 2 keyboard" H: Handlers=sysrq kbd event0 B: KEY=10000 7ff 202100 3953b001 68ffe0 1 20000 2000000000000 0 """ with patch("builtins.open", mock_open(read_data=mock_proc_content)): with patch("os.path.exists", return_value=False): result = find_keyboard_devices() assert "/dev/input/event0" not in result class TestDeviceHasModifierKey: """Test device_has_modifier_key() function.""" @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", False) def test_device_has_modifier_key_evdev_not_available(self): """Test returns False when evdev is not available.""" result = device_has_modifier_key("/dev/input/event0", "ctrl") assert result is False @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", True) @patch("vocalinux.ui.keyboard_backends.evdev_backend.InputDevice") def test_device_has_modifier_key_has_ctrl(self, mock_input_device): """Test device with ctrl modifier key capability.""" mock_device = MagicMock() mock_device.capabilities.return_value = { 1: [29, 97] # EV_KEY: [KEY_LEFTCTRL, KEY_RIGHTCTRL] } mock_input_device.return_value = mock_device # Mock ecodes with patch("vocalinux.ui.keyboard_backends.evdev_backend.ecodes") as mock_ecodes: mock_ecodes.EV_KEY = 1 result = device_has_modifier_key("/dev/input/event0", "ctrl") assert result is True @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", True) @patch("vocalinux.ui.keyboard_backends.evdev_backend.InputDevice") def test_device_has_modifier_key_missing_modifier(self, mock_input_device): """Test device without specific modifier key capability.""" mock_device = MagicMock() mock_device.capabilities.return_value = { 1: [1, 2, 3] # EV_KEY with different keys (not ctrl) } mock_input_device.return_value = mock_device with patch("vocalinux.ui.keyboard_backends.evdev_backend.ecodes") as mock_ecodes: mock_ecodes.EV_KEY = 1 result = device_has_modifier_key("/dev/input/event0", "ctrl") assert result is False @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", True) @patch("vocalinux.ui.keyboard_backends.evdev_backend.InputDevice") def test_device_has_modifier_key_alt(self, mock_input_device): """Test device with alt modifier key capability.""" mock_device = MagicMock() mock_device.capabilities.return_value = { 1: [56, 100] # EV_KEY: [KEY_LEFTALT, KEY_RIGHTALT] } mock_input_device.return_value = mock_device with patch("vocalinux.ui.keyboard_backends.evdev_backend.ecodes") as mock_ecodes: mock_ecodes.EV_KEY = 1 result = device_has_modifier_key("/dev/input/event0", "alt") assert result is True @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", True) @patch("vocalinux.ui.keyboard_backends.evdev_backend.InputDevice") def test_device_has_modifier_key_left_ctrl_specific(self, mock_input_device): """Test device with left_ctrl specifically.""" mock_device = MagicMock() mock_device.capabilities.return_value = {1: [29]} # EV_KEY: [KEY_LEFTCTRL only] mock_input_device.return_value = mock_device with patch("vocalinux.ui.keyboard_backends.evdev_backend.ecodes") as mock_ecodes: mock_ecodes.EV_KEY = 1 result = device_has_modifier_key("/dev/input/event0", "left_ctrl") assert result is True @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", True) @patch("vocalinux.ui.keyboard_backends.evdev_backend.InputDevice") def test_device_has_modifier_key_os_error(self, mock_input_device): """Test handling of OSError when opening device.""" mock_input_device.side_effect = OSError("Permission denied") result = device_has_modifier_key("/dev/input/event0", "ctrl") assert result is False @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", True) @patch("vocalinux.ui.keyboard_backends.evdev_backend.InputDevice") def test_device_has_modifier_key_invalid_modifier(self, mock_input_device): """Test with invalid modifier name.""" result = device_has_modifier_key("/dev/input/event0", "invalid") assert result is False class TestDeviceHasKey: """Test device_has_key() against EV_KEY capabilities.""" @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", True) @patch("vocalinux.ui.keyboard_backends.evdev_backend.InputDevice") def test_device_has_key_f10(self, mock_input_device): mock_device = MagicMock() mock_device.capabilities.return_value = {1: [68]} # KEY_F10 mock_input_device.return_value = mock_device with patch("vocalinux.ui.keyboard_backends.evdev_backend.ecodes") as mock_ecodes: mock_ecodes.EV_KEY = 1 mock_ecodes.KEY_F10 = 68 assert device_has_key("/dev/input/event0", "f10") is True @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", True) @patch("vocalinux.ui.keyboard_backends.evdev_backend.InputDevice") def test_device_has_key_missing(self, mock_input_device): mock_device = MagicMock() mock_device.capabilities.return_value = {1: [1, 2, 3]} mock_input_device.return_value = mock_device with patch("vocalinux.ui.keyboard_backends.evdev_backend.ecodes") as mock_ecodes: mock_ecodes.EV_KEY = 1 mock_ecodes.KEY_F10 = 68 assert device_has_key("/dev/input/event0", "f10") is False class TestEvdevKeyboardBackendInit: """Test EvdevKeyboardBackend initialization.""" def test_init_default_values(self): """Test initialization with default values.""" backend = EvdevKeyboardBackend() assert backend.shortcut == "right_alt+right_alt" assert backend.mode == "push_to_talk" assert backend.active is False assert backend.devices == [] assert backend.device_fds == [] assert backend.running is False assert backend.monitor_thread is None def test_init_custom_shortcut(self): """Test initialization with custom shortcut.""" backend = EvdevKeyboardBackend(shortcut="alt+alt") assert backend.shortcut == "alt+alt" assert backend.modifier_key == "alt" def test_init_custom_mode(self): """Test initialization with custom mode.""" backend = EvdevKeyboardBackend(mode="push_to_talk") assert backend.mode == "push_to_talk" def test_init_double_tap_threshold(self): """Test that double tap threshold is initialized.""" backend = EvdevKeyboardBackend() assert backend.double_tap_threshold == 0.3 def test_init_left_shift_shortcut(self): """Test initialization with left_shift shortcut.""" backend = EvdevKeyboardBackend(shortcut="left_shift+left_shift") assert backend.modifier_key == "left_shift" def test_init_key_pressed_devices_empty(self): """Test that key_pressed_devices starts empty.""" backend = EvdevKeyboardBackend() assert backend.key_pressed_devices == set() class TestEvdevKeyboardBackendIsAvailable: """Test is_available() method.""" @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", False) def test_is_available_evdev_not_available(self): """Test is_available returns False when evdev not available.""" backend = EvdevKeyboardBackend() result = backend.is_available() assert result is False @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", True) @patch("vocalinux.ui.keyboard_backends.evdev_backend.find_keyboard_devices") def test_is_available_no_devices_found(self, mock_find_devices): """Test is_available returns False when no devices found.""" mock_find_devices.return_value = [] backend = EvdevKeyboardBackend() result = backend.is_available() assert result is False @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", True) @patch("vocalinux.ui.keyboard_backends.evdev_backend.find_keyboard_devices") @patch("vocalinux.ui.keyboard_backends.evdev_backend.device_has_modifier_key") def test_is_available_device_with_modifier(self, mock_has_mod, mock_find_devices): """Test is_available returns True when device with modifier found.""" mock_find_devices.return_value = ["/dev/input/event0"] mock_has_mod.return_value = True backend = EvdevKeyboardBackend() result = backend.is_available() assert result is True @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", True) @patch("vocalinux.ui.keyboard_backends.evdev_backend.find_keyboard_devices") @patch("vocalinux.ui.keyboard_backends.evdev_backend.device_has_modifier_key") def test_is_available_no_device_with_modifier(self, mock_has_mod, mock_find_devices): """Test is_available returns False when no device has required modifier.""" mock_find_devices.return_value = ["/dev/input/event0"] mock_has_mod.return_value = False backend = EvdevKeyboardBackend() result = backend.is_available() assert result is False @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", True) @patch("vocalinux.ui.keyboard_backends.evdev_backend.find_keyboard_devices") def test_is_available_exception_handling(self, mock_find_devices): """Test is_available handles exceptions gracefully.""" mock_find_devices.side_effect = Exception("Test error") backend = EvdevKeyboardBackend() result = backend.is_available() assert result is False class TestEvdevKeyboardBackendPermissionHint: """Test get_permission_hint() method.""" @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", False) def test_permission_hint_evdev_not_available(self): """Test permission hint when evdev not installed.""" backend = EvdevKeyboardBackend() result = backend.get_permission_hint() assert "pip install" in result or "evdev" in result @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", True) @patch("vocalinux.ui.keyboard_backends.evdev_backend.find_keyboard_devices") def test_permission_hint_no_devices(self, mock_find_devices): """Test permission hint when no devices found.""" mock_find_devices.return_value = [] backend = EvdevKeyboardBackend() result = backend.get_permission_hint() assert result is None @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", True) @patch("vocalinux.ui.keyboard_backends.evdev_backend.find_keyboard_devices") @patch("vocalinux.ui.keyboard_backends.evdev_backend.InputDevice") def test_permission_hint_permission_denied(self, mock_input_device, mock_find_devices): """Test permission hint when permission denied.""" mock_find_devices.return_value = ["/dev/input/event0"] error = OSError(errno.EACCES, "Permission denied") mock_input_device.side_effect = error backend = EvdevKeyboardBackend() result = backend.get_permission_hint() assert result is not None assert "input" in result or "group" in result @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", True) @patch("vocalinux.ui.keyboard_backends.evdev_backend.find_keyboard_devices") @patch("vocalinux.ui.keyboard_backends.evdev_backend.InputDevice") def test_permission_hint_device_accessible(self, mock_input_device, mock_find_devices): """Test permission hint when device is accessible.""" mock_find_devices.return_value = ["/dev/input/event0"] mock_device = MagicMock() mock_input_device.return_value = mock_device backend = EvdevKeyboardBackend() result = backend.get_permission_hint() assert result is None @patch.dict("os.environ", {"SNAP": "/snap/vocalinux/x1"}, clear=False) @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", True) @patch("vocalinux.ui.keyboard_backends.evdev_backend.find_keyboard_devices") def test_permission_hint_snap_no_devices(self, mock_find_devices): """Snap with no listed devices should ask for both input plugs.""" mock_find_devices.return_value = [] backend = EvdevKeyboardBackend() result = backend.get_permission_hint() assert result is not None assert "raw-input" in result assert "hardware-observe" in result @patch.dict("os.environ", {"SNAP": "/snap/vocalinux/x1"}, clear=False) @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", True) @patch("vocalinux.ui.keyboard_backends.evdev_backend.find_keyboard_devices") @patch("vocalinux.ui.keyboard_backends.evdev_backend.InputDevice") def test_permission_hint_snap_permission_denied(self, mock_input_device, mock_find_devices): """Snap that cannot open /dev/input should ask for both input plugs.""" mock_find_devices.return_value = ["/dev/input/event0"] mock_input_device.side_effect = OSError(errno.EACCES, "Permission denied") backend = EvdevKeyboardBackend() result = backend.get_permission_hint() assert result is not None assert "raw-input" in result assert "hardware-observe" in result class TestEvdevKeyboardBackendStart: """Test start() method.""" @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", False) def test_start_evdev_not_available(self): """Test start returns False when evdev not available.""" backend = EvdevKeyboardBackend() result = backend.start() assert result is False @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", True) @patch("vocalinux.ui.keyboard_backends.evdev_backend.find_keyboard_devices") def test_start_no_devices(self, mock_find_devices): """Test start returns False when no devices found.""" mock_find_devices.return_value = [] backend = EvdevKeyboardBackend() result = backend.start() assert result is False @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", True) @patch("vocalinux.ui.keyboard_backends.evdev_backend.find_keyboard_devices") @patch("vocalinux.ui.keyboard_backends.evdev_backend.InputDevice") def test_start_successful(self, mock_input_device, mock_find_devices): """Test successful start.""" mock_find_devices.return_value = ["/dev/input/event0"] mock_device = MagicMock() mock_device.fileno.return_value = 10 mock_input_device.return_value = mock_device backend = EvdevKeyboardBackend() result = backend.start() assert result is True assert backend.active is True assert backend.running is True assert len(backend.devices) == 1 assert 10 in backend.device_fds @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", True) def test_start_already_active(self): """Test that start returns True if already active.""" backend = EvdevKeyboardBackend() backend.active = True result = backend.start() assert result is True @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", True) @patch("vocalinux.ui.keyboard_backends.evdev_backend.find_keyboard_devices") @patch("vocalinux.ui.keyboard_backends.evdev_backend.InputDevice") def test_start_creates_monitor_thread(self, mock_input_device, mock_find_devices): """Test that monitor thread is created.""" mock_find_devices.return_value = ["/dev/input/event0"] mock_device = MagicMock() mock_device.fileno.return_value = 10 mock_input_device.return_value = mock_device backend = EvdevKeyboardBackend() backend.start() assert backend.monitor_thread is not None assert isinstance(backend.monitor_thread, threading.Thread) # Clean up backend.stop() @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", True) @patch("vocalinux.ui.keyboard_backends.evdev_backend.find_keyboard_devices") @patch("vocalinux.ui.keyboard_backends.evdev_backend.InputDevice") def test_start_fails_when_devices_cannot_be_opened(self, mock_input_device, mock_find_devices): """Test start fails when discovery finds devices but none can be opened.""" mock_find_devices.return_value = ["/dev/input/event0"] mock_input_device.side_effect = OSError("permission denied") backend = EvdevKeyboardBackend() result = backend.start() assert result is False assert backend.active is False assert backend.devices == [] assert backend.device_fds == [] class TestEvdevKeyboardBackendStop: """Test stop() method.""" def test_stop_when_not_active(self): """Test that stop is safe when not active.""" backend = EvdevKeyboardBackend() backend.stop() # Should not raise @patch("vocalinux.ui.keyboard_backends.evdev_backend.EVDEV_AVAILABLE", True) @patch("vocalinux.ui.keyboard_backends.evdev_backend.find_keyboard_devices") @patch("vocalinux.ui.keyboard_backends.evdev_backend.InputDevice") def test_stop_active_backend(self, mock_input_device, mock_find_devices): """Test stopping an active backend.""" mock_find_devices.return_value = ["/dev/input/event0"] mock_device = MagicMock() mock_device.fileno.return_value = 10 mock_input_device.return_value = mock_device backend = EvdevKeyboardBackend() backend.start() # Give thread a moment to start time.sleep(0.1) backend.stop() assert backend.active is False assert backend.running is False assert backend.devices == [] assert backend.device_fds == [] def test_stop_active_without_thread_handles_close_failure(self): """Test active stop without a monitor thread still clears device state.""" backend = EvdevKeyboardBackend() mock_device = MagicMock() mock_device.close.side_effect = RuntimeError("already closed") backend.active = True backend.running = True backend.devices = [mock_device] backend.device_fds = [10] backend.device_paths = {"/dev/input/event0"} backend._dropped_devices = {10} backend._device_paths_by_fd = {10: "/dev/input/event0"} backend.stop() assert backend.active is False assert backend.running is False assert backend.devices == [] assert backend.device_fds == [] assert backend.device_paths == set() assert backend._dropped_devices == set() assert backend._device_paths_by_fd == {} class TestEvdevKeyboardBackendHotplug: """Test hotplug discovery for evdev keyboard devices.""" @patch("vocalinux.ui.keyboard_backends.evdev_backend.find_keyboard_devices") @patch("vocalinux.ui.keyboard_backends.evdev_backend.InputDevice") def test_scan_for_new_devices_opens_hotplugged_keyboard( self, mock_input_device, mock_find_devices ): """Test that rescanning opens keyboard devices that appear after startup.""" existing_device = MagicMock() existing_device.fileno.return_value = 10 new_device = MagicMock() new_device.fileno.return_value = 11 new_device.name = "External Keyboard" mock_input_device.return_value = new_device mock_find_devices.return_value = ["/dev/input/event0", "/dev/input/event1"] backend = EvdevKeyboardBackend() backend.devices = [existing_device] backend.device_fds = [10] backend.device_paths = {"/dev/input/event0"} backend._device_paths_by_fd = {10: "/dev/input/event0"} added = backend._scan_for_new_devices() assert added == 1 mock_input_device.assert_called_once_with("/dev/input/event1") assert new_device in backend.devices assert 11 in backend.device_fds assert "/dev/input/event1" in backend.device_paths assert backend._device_paths_by_fd[11] == "/dev/input/event1" @patch("vocalinux.ui.keyboard_backends.evdev_backend.InputDevice") def test_open_keyboard_device_skips_known_path(self, mock_input_device): """Test opening a device already tracked by path is a no-op.""" backend = EvdevKeyboardBackend() backend.device_paths = {"/dev/input/event0"} opened = backend._open_keyboard_device("/dev/input/event0") assert opened is False mock_input_device.assert_not_called() @patch("vocalinux.ui.keyboard_backends.evdev_backend.InputDevice") def test_open_keyboard_device_handles_open_failure(self, mock_input_device): """Test open failures leave backend device state unchanged.""" mock_input_device.side_effect = OSError("permission denied") backend = EvdevKeyboardBackend() opened = backend._open_keyboard_device("/dev/input/event7") assert opened is False assert backend.devices == [] assert backend.device_fds == [] assert backend.device_paths == set() @patch("vocalinux.ui.keyboard_backends.evdev_backend.InputDevice") def test_open_keyboard_device_closes_duplicate_fd(self, mock_input_device): """Test a duplicate fd opened through a new path is discarded.""" duplicate_device = MagicMock() duplicate_device.fileno.return_value = 10 duplicate_device.close.side_effect = RuntimeError("close failed") mock_input_device.return_value = duplicate_device backend = EvdevKeyboardBackend() backend.device_fds = [10] opened = backend._open_keyboard_device("/dev/input/event9") assert opened is False assert backend.devices == [] assert backend.device_paths == set() duplicate_device.close.assert_called_once() @patch("vocalinux.ui.keyboard_backends.evdev_backend.find_keyboard_devices") def test_scan_for_new_devices_handles_discovery_failure(self, mock_find_devices): """Test rescan failures do not stop the monitor loop.""" mock_find_devices.side_effect = RuntimeError("proc read failed") backend = EvdevKeyboardBackend() added = backend._scan_for_new_devices() assert added == 0 @patch("vocalinux.ui.keyboard_backends.evdev_backend.find_keyboard_devices") def test_scan_for_new_devices_no_new_devices(self, mock_find_devices): """Test rescanning with only already-tracked paths returns zero.""" mock_find_devices.return_value = ["/dev/input/event0"] backend = EvdevKeyboardBackend() backend.device_paths = {"/dev/input/event0"} added = backend._scan_for_new_devices() assert added == 0 @patch("vocalinux.ui.keyboard_backends.evdev_backend.InputDevice") def test_removed_device_path_can_be_reopened(self, mock_input_device): """Test that disconnected device paths are forgotten for later replug.""" old_device = MagicMock() old_device.fileno.return_value = 10 old_device.name = "External Keyboard" new_device = MagicMock() new_device.fileno.return_value = 12 new_device.name = "External Keyboard" mock_input_device.return_value = new_device backend = EvdevKeyboardBackend() backend.devices = [old_device] backend.device_fds = [10] backend.device_paths = {"/dev/input/event4"} backend._device_paths_by_fd = {10: "/dev/input/event4"} backend.key_pressed_devices = {id(old_device)} backend._remove_keyboard_device(10, old_device) assert backend.devices == [] assert backend.device_fds == [] assert backend.device_paths == set() assert backend.key_pressed_devices == set() old_device.close.assert_called_once() reopened = backend._open_keyboard_device("/dev/input/event4") assert reopened is True mock_input_device.assert_called_once_with("/dev/input/event4") assert new_device in backend.devices assert backend._device_paths_by_fd[12] == "/dev/input/event4" def test_remove_keyboard_device_handles_stale_state(self): """Test removing a device tolerates already-pruned backend state.""" stale_device = MagicMock() stale_device.close.side_effect = RuntimeError("already closed") backend = EvdevKeyboardBackend() backend.devices = [] backend.device_fds = [] backend.device_paths = {"/dev/input/event8"} backend._device_paths_by_fd = {} backend._dropped_devices = {12} backend.key_pressed_devices = {id(stale_device)} backend._remove_keyboard_device(12, stale_device) assert backend.device_paths == {"/dev/input/event8"} assert backend._dropped_devices == set() assert backend.key_pressed_devices == set() def test_monitor_scans_when_all_devices_are_disconnected(self): """Test that the monitor keeps rescanning after the last fd is removed.""" backend = EvdevKeyboardBackend() backend.running = True backend.device_fds = [] backend._scan_for_new_devices = MagicMock(return_value=0) def stop_after_sleep(seconds): backend.running = False with ( patch( "vocalinux.ui.keyboard_backends.evdev_backend.time.monotonic", side_effect=[0.0, DEVICE_RESCAN_SECONDS + 0.1], ), patch( "vocalinux.ui.keyboard_backends.evdev_backend.time.sleep", side_effect=stop_after_sleep, ), ): backend._monitor_devices() backend._scan_for_new_devices.assert_called_once() def test_monitor_dispatches_events_from_readable_device(self): """Test readable fds are resolved to devices and dispatched.""" backend = EvdevKeyboardBackend() device = MagicMock() device.fileno.return_value = 10 device.read.return_value = [MagicMock(type=1, code=29, value=1)] backend.running = True backend.devices = [device] backend.device_fds = [10] backend._handle_key_event = MagicMock( side_effect=lambda event, device: setattr(backend, "running", False) ) with ( patch( "vocalinux.ui.keyboard_backends.evdev_backend.time.monotonic", side_effect=[0.0, 0.0], ), patch( "vocalinux.ui.keyboard_backends.evdev_backend.select.select", return_value=([10], [], []), ), patch("vocalinux.ui.keyboard_backends.evdev_backend.ecodes") as mock_ecodes, ): mock_ecodes.EV_SYN = 0 mock_ecodes.EV_KEY = 1 backend._monitor_devices() backend._handle_key_event.assert_called_once() def test_monitor_ignores_readable_fd_without_device(self): """Test readable fds that no longer map to a device are ignored.""" backend = EvdevKeyboardBackend() backend.running = True backend.devices = [] backend.device_fds = [10] def select_unknown_fd(read_fds, write_fds, error_fds, timeout): backend.running = False return [10], [], [] with ( patch( "vocalinux.ui.keyboard_backends.evdev_backend.time.monotonic", side_effect=[0.0, 0.0], ), patch( "vocalinux.ui.keyboard_backends.evdev_backend.select.select", side_effect=select_unknown_fd, ), ): backend._monitor_devices() def test_monitor_handles_syn_dropped_recovery(self): """Test SYN_DROPPED state is cleared on the following SYN_REPORT.""" backend = EvdevKeyboardBackend() device = MagicMock() device.fileno.return_value = 10 device.name = "External Keyboard" dropped_event = MagicMock(type=0, code=3) report_event = MagicMock(type=0, code=0) def read_events(): backend.running = False return [dropped_event, report_event] device.read.side_effect = read_events backend.running = True backend.devices = [device] backend.device_fds = [10] backend.key_pressed_devices = {id(device)} with ( patch( "vocalinux.ui.keyboard_backends.evdev_backend.time.monotonic", side_effect=[0.0, 0.0], ), patch( "vocalinux.ui.keyboard_backends.evdev_backend.select.select", return_value=([10], [], []), ), patch("vocalinux.ui.keyboard_backends.evdev_backend.ecodes") as mock_ecodes, ): mock_ecodes.EV_SYN = 0 mock_ecodes.SYN_DROPPED = 3 mock_ecodes.SYN_REPORT = 0 backend._monitor_devices() assert backend._dropped_devices == set() assert backend.key_pressed_devices == set() def test_monitor_skips_events_while_device_is_dropped(self): """Test key events are ignored while a device is in SYN_DROPPED state.""" backend = EvdevKeyboardBackend() device = MagicMock() device.fileno.return_value = 10 key_event = MagicMock(type=1, code=29, value=1) def read_events(): backend.running = False return [key_event] device.read.side_effect = read_events backend.running = True backend.devices = [device] backend.device_fds = [10] backend._dropped_devices = {10} backend._handle_key_event = MagicMock() with ( patch( "vocalinux.ui.keyboard_backends.evdev_backend.time.monotonic", side_effect=[0.0, 0.0], ), patch( "vocalinux.ui.keyboard_backends.evdev_backend.select.select", return_value=([10], [], []), ), patch("vocalinux.ui.keyboard_backends.evdev_backend.ecodes") as mock_ecodes, ): mock_ecodes.EV_SYN = 0 backend._monitor_devices() backend._handle_key_event.assert_not_called() def test_monitor_removes_device_on_read_error(self): """Test disconnected devices are removed from the monitor loop.""" backend = EvdevKeyboardBackend() device = MagicMock() device.fileno.return_value = 10 device.name = "External Keyboard" device.read.side_effect = OSError("device removed") backend.running = True backend.devices = [device] backend.device_fds = [10] backend._remove_keyboard_device = MagicMock( side_effect=lambda fd, device: setattr(backend, "running", False) ) with ( patch( "vocalinux.ui.keyboard_backends.evdev_backend.time.monotonic", side_effect=[0.0, 0.0], ), patch( "vocalinux.ui.keyboard_backends.evdev_backend.select.select", return_value=([10], [], []), ), ): backend._monitor_devices() backend._remove_keyboard_device.assert_called_once_with(10, device) def test_monitor_handles_fd_lookup_error(self): """Test fd lookup errors do not try to remove an unknown device.""" backend = EvdevKeyboardBackend() device = MagicMock() device.fileno.side_effect = OSError("bad fd") backend.running = True backend.devices = [device] backend.device_fds = [10] backend._remove_keyboard_device = MagicMock() def select_bad_fd(read_fds, write_fds, error_fds, timeout): backend.running = False return [10], [], [] with ( patch( "vocalinux.ui.keyboard_backends.evdev_backend.time.monotonic", side_effect=[0.0, 0.0], ), patch( "vocalinux.ui.keyboard_backends.evdev_backend.select.select", side_effect=select_bad_fd, ), ): backend._monitor_devices() backend._remove_keyboard_device.assert_not_called() def test_monitor_stops_on_select_error(self): """Test select errors stop the monitor loop.""" backend = EvdevKeyboardBackend() backend.running = True backend.device_fds = [10] with ( patch( "vocalinux.ui.keyboard_backends.evdev_backend.time.monotonic", side_effect=[0.0, 0.0], ), patch( "vocalinux.ui.keyboard_backends.evdev_backend.select.select", side_effect=OSError("select failed"), ), ): backend._monitor_devices() class TestEvdevKeyboardBackendHandleKeyEvent: """Test _handle_key_event() method.""" def test_handle_key_event_toggle_mode_double_tap(self): """Test double-tap detection in toggle mode.""" backend = EvdevKeyboardBackend(shortcut="ctrl+ctrl", mode="toggle") callback = MagicMock() backend.register_toggle_callback(callback) mock_device = MagicMock() mock_event = MagicMock() mock_event.code = 29 # KEY_LEFTCTRL mock_event.value = 1 # Press # Set up timing for double-tap backend.last_key_press_time = time.time() - 0.1 backend.last_trigger_time = time.time() - 1.0 with patch("vocalinux.ui.keyboard_backends.evdev_backend.ecodes") as mock_ecodes: mock_ecodes.EV_KEY = 1 backend._handle_key_event(mock_event, mock_device) time.sleep(0.1) def test_handle_key_event_non_target_key(self): """Test that non-target keys are ignored.""" backend = EvdevKeyboardBackend(shortcut="ctrl+ctrl") callback = MagicMock() backend.register_toggle_callback(callback) mock_device = MagicMock() mock_event = MagicMock() mock_event.code = 1 # Some non-modifier key mock_event.value = 1 with patch("vocalinux.ui.keyboard_backends.evdev_backend.ecodes") as mock_ecodes: mock_ecodes.EV_KEY = 1 backend._handle_key_event(mock_event, mock_device) # Callback should not be called def test_handle_key_event_push_to_talk_press(self): """Test push-to-talk mode triggers on press.""" backend = EvdevKeyboardBackend(shortcut="alt+alt", mode="push_to_talk") callback = MagicMock() backend.register_press_callback(callback) mock_device = MagicMock() mock_event = MagicMock() mock_event.code = 56 # KEY_LEFTALT mock_event.value = 1 # Press with patch("vocalinux.ui.keyboard_backends.evdev_backend.ecodes") as mock_ecodes: mock_ecodes.EV_KEY = 1 backend._handle_key_event(mock_event, mock_device) time.sleep(0.1) def test_handle_key_event_push_to_talk_release(self): """Test push-to-talk mode triggers on release.""" backend = EvdevKeyboardBackend(shortcut="shift+shift", mode="push_to_talk") callback = MagicMock() backend.register_release_callback(callback) mock_device = MagicMock() mock_event = MagicMock() mock_event.code = 42 # KEY_LEFTSHIFT mock_event.value = 0 # Release with patch("vocalinux.ui.keyboard_backends.evdev_backend.ecodes") as mock_ecodes: mock_ecodes.EV_KEY = 1 backend._handle_key_event(mock_event, mock_device) time.sleep(0.1) def test_handle_key_event_exception_handling(self): """Test exception handling in _handle_key_event.""" backend = EvdevKeyboardBackend() mock_device = MagicMock() mock_event = MagicMock() mock_event.code = 29 # Make _get_target_key_codes raise an exception backend._get_target_key_codes = MagicMock(side_effect=Exception("Test error")) backend._handle_key_event(mock_event, mock_device) # Should not raise class TestEvdevKeyboardBackendGetTargetKeyCodes: """Test _get_target_key_codes() method.""" def test_get_target_key_codes_ctrl(self): """Test getting key codes for ctrl modifier.""" backend = EvdevKeyboardBackend(shortcut="ctrl+ctrl") result = backend._get_target_key_codes() assert 29 in result # KEY_LEFTCTRL assert 97 in result # KEY_RIGHTCTRL def test_get_target_key_codes_left_ctrl(self): """Test getting key codes for left_ctrl modifier.""" backend = EvdevKeyboardBackend(shortcut="left_ctrl+left_ctrl") result = backend._get_target_key_codes() assert 29 in result # KEY_LEFTCTRL assert 97 not in result # KEY_RIGHTCTRL should not be included def test_get_target_key_codes_alt(self): """Test getting key codes for alt modifier.""" backend = EvdevKeyboardBackend(shortcut="alt+alt") result = backend._get_target_key_codes() assert 56 in result # KEY_LEFTALT assert 100 in result # KEY_RIGHTALT def test_get_target_key_codes_shift(self): """Test getting key codes for shift modifier.""" backend = EvdevKeyboardBackend(shortcut="shift+shift") result = backend._get_target_key_codes() assert 42 in result # KEY_LEFTSHIFT assert 54 in result # KEY_RIGHTSHIFT