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voculinux/tests/test_keyboard_shortcuts.py
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Jatin K MalikandGitHub 22ab96cea7 feat: add Wayland support for keyboard shortcuts using evdev backend (#81)
* feat: add Wayland support for keyboard shortcuts using evdev backend

This commit adds multi-backend support for keyboard shortcuts, enabling
them to work on Wayland sessions where pynput does not work.

**Changes:**
- New `keyboard_backends/` package with modular backend system
  - `base.py`: Abstract base class for keyboard backends
  - `pynput_backend.py`: Existing pynput implementation (X11/XWayland)
  - `evdev_backend.py`: New evdev implementation (X11 & Wayland)
  - `__init__.py`: Backend factory with auto-detection

- Updated `keyboard_shortcuts.py`:
  - Refactored to use backend system
  - Auto-detects session type (X11 vs Wayland)
  - Selects appropriate backend automatically
  - Provides helpful error messages when shortcuts unavailable

- Added `evdev>=1.6.0` to dependencies (Linux only)

- Comprehensive test updates:
  - 21 tests pass covering all backends
  - Tests for session detection
  - Tests for backend factory
  - Tests for permission hints

**User Impact:**
- Keyboard shortcuts now work on Wayland when user is in 'input' group
- Clear error messages guide users to fix permission issues
- Backward compatible with X11 (pynput backend)

**Setup for Wayland:**
```bash
sudo usermod -a -G input $USER
# Log out and log back in
```

Related to #80

* style: fix flake8 issues in evdev_backend.py

- Remove unused import 'categorize'
- Remove unused variable 'dev'

* style: fix remaining flake8 issues in tests

- Remove unused 'time' import
- Remove unused 'result' variable
- Remove unused 'backend_cls' variable
- Break long line to stay under 100 characters

* style: apply black and isort formatting to pass CI

* feat: auto-configure Wayland keyboard shortcuts during installation

Automatically detect Wayland sessions during installation and add the user
to the 'input' group required for evdev-based keyboard shortcuts.

This eliminates the need for users to manually configure permissions
after installation on Wayland systems.

* fix: escape commit message in Detect Changes step to handle special characters

The commit message was being directly inserted into the bash comparison,
which broke when the message contained special characters like parentheses.
Fix by assigning to a variable first.

* chore: drop unrelated installer/web changes

* fix: fall back to evdev backend

* style: format keyboard shortcut imports
2026-02-04 20:14:58 -08:00

364 lines
13 KiB
Python

"""
Tests for keyboard shortcut functionality.
"""
import unittest
from unittest.mock import MagicMock, Mock, patch
# Update import to use the new package structure
from vocalinux.ui.keyboard_shortcuts import KeyboardShortcutManager
class TestKeyboardShortcuts(unittest.TestCase):
"""Test cases for the keyboard shortcuts functionality."""
def setUp(self):
"""Set up for tests."""
# Mock the backend system
self.backend_patch = patch("vocalinux.ui.keyboard_shortcuts.create_backend")
self.mock_create_backend = self.backend_patch.start()
# Create a mock backend
self.mock_backend = MagicMock()
self.mock_backend.active = False
self.mock_backend.double_tap_callback = None
self.mock_backend.start.return_value = True
self.mock_create_backend.return_value = self.mock_backend
# Create a new KSM for each test
self.ksm = KeyboardShortcutManager()
def tearDown(self):
"""Clean up after tests."""
self.backend_patch.stop()
def test_init(self):
"""Test initialization of the keyboard shortcut manager."""
# Verify backend was created
self.mock_create_backend.assert_called_once()
self.assertIsNotNone(self.ksm.backend_instance)
def test_start_listener(self):
"""Test starting the keyboard listener."""
# Start the listener
result = self.ksm.start()
# Verify backend start was called
self.mock_backend.start.assert_called_once()
self.assertTrue(self.ksm.active)
self.assertTrue(result)
def test_start_already_active(self):
"""Test starting when already active."""
# Make it active already
self.mock_backend.active = True
self.ksm.active = True
# Try to start again
result = self.ksm.start()
# Verify start was not called again
self.mock_backend.start.assert_not_called()
self.assertTrue(result)
def test_start_listener_failed(self):
"""Test handling when listener fails to start."""
# Make start return False
self.mock_backend.start.return_value = False
self.mock_backend.get_permission_hint.return_value = None
# Start the listener
result = self.ksm.start()
# Should return False
self.assertFalse(result)
self.assertFalse(self.ksm.active)
def test_stop_listener(self):
"""Test stopping the keyboard listener."""
# Setup an active listener
self.ksm.start()
self.mock_backend.active = True
# Stop the listener
self.ksm.stop()
# Verify backend stop was called
self.mock_backend.stop.assert_called_once()
self.assertFalse(self.ksm.active)
def test_stop_not_active(self):
"""Test stopping when not active."""
# Make it inactive
self.ksm.active = False
self.mock_backend.active = False
# Try to stop
self.ksm.stop()
# Backend stop should still be called (idempotent)
self.mock_backend.stop.assert_called_once()
def test_register_toggle_callback(self):
"""Test registering toggle callback with double-tap shortcut."""
# Create mock callback
callback = MagicMock()
# Register as toggle callback
self.ksm.register_toggle_callback(callback)
# Verify it was registered on the backend
self.mock_backend.register_toggle_callback.assert_called_once_with(callback)
def test_no_backend_available(self):
"""Test behavior when no backend is available."""
# Mock create_backend returning None
self.mock_create_backend.return_value = None
# Create a new KSM
ksm = KeyboardShortcutManager()
# Verify backend is None
self.assertIsNone(ksm.backend_instance)
# Start should return False
result = ksm.start()
self.assertFalse(result)
# Register callback should warn but not crash
callback = MagicMock()
ksm.register_toggle_callback(callback) # Should not raise
def test_permission_hint_on_start_failure(self):
"""Test that permission hint is logged on start failure."""
# Make start return False
self.mock_backend.start.return_value = False
self.mock_backend.get_permission_hint.return_value = "Add user to input group"
# Start the listener
with patch("vocalinux.ui.keyboard_shortcuts.logger") as mock_logger:
self.ksm.start()
# Verify permission hint was logged
mock_logger.warning.assert_called()
warning_calls = [str(call) for call in mock_logger.warning.call_args_list]
self.assertTrue(any("Permission issue" in str(call) for call in warning_calls))
class TestPynputBackend(unittest.TestCase):
"""Test cases for the pynput backend specifically."""
def setUp(self):
"""Set up for pynput backend tests."""
# Mock pynput
self.pynput_patch = patch(
"vocalinux.ui.keyboard_backends.pynput_backend.PYNPUT_AVAILABLE", True
)
self.pynput_patch.start()
self.keyboard_patch = patch("vocalinux.ui.keyboard_backends.pynput_backend.keyboard")
self.mock_keyboard = self.keyboard_patch.start()
# Set up Key attributes
self.mock_keyboard.Key.ctrl = Mock()
self.mock_keyboard.Key.ctrl_l = Mock()
self.mock_keyboard.Key.ctrl_r = Mock()
self.mock_keyboard.Key.alt = Mock()
self.mock_keyboard.Key.alt_l = Mock()
self.mock_keyboard.Key.alt_r = Mock()
# Create mock Listener
self.mock_listener = MagicMock()
self.mock_listener.is_alive.return_value = True
self.mock_keyboard.Listener.return_value = self.mock_listener
def tearDown(self):
"""Clean up after pynput tests."""
self.pynput_patch.stop()
self.keyboard_patch.stop()
def test_pynput_backend_is_available(self):
"""Test that pynput backend reports as available when pynput is installed."""
from vocalinux.ui.keyboard_backends.pynput_backend import PynputKeyboardBackend
backend = PynputKeyboardBackend()
self.assertTrue(backend.is_available())
def test_pynput_backend_start(self):
"""Test starting pynput backend."""
from vocalinux.ui.keyboard_backends.pynput_backend import PynputKeyboardBackend
backend = PynputKeyboardBackend()
result = backend.start()
# Verify listener was created and started
self.mock_keyboard.Listener.assert_called_once()
self.mock_listener.start.assert_called_once()
self.assertTrue(result)
self.assertTrue(backend.active)
def test_pynput_backend_stop(self):
"""Test stopping pynput backend."""
from vocalinux.ui.keyboard_backends.pynput_backend import PynputKeyboardBackend
backend = PynputKeyboardBackend()
backend.start()
backend.active = True
backend.stop()
# Verify listener was stopped
self.mock_listener.stop.assert_called_once()
self.assertFalse(backend.active)
def test_pynput_backend_no_permission_hint(self):
"""Test that pynput backend has no permission hint."""
from vocalinux.ui.keyboard_backends.pynput_backend import PynputKeyboardBackend
backend = PynputKeyboardBackend()
self.assertIsNone(backend.get_permission_hint())
class TestEvdevBackend(unittest.TestCase):
"""Test cases for the evdev backend."""
def setUp(self):
"""Set up for evdev backend tests."""
# Import sys to add mock modules
import sys
# Create a mock evdev module structure
self.mock_evdev = MagicMock()
self.mock_evdev.__name__ = "evdev"
self.mock_evdev.ecodes = MagicMock()
self.mock_evdev.categorize = MagicMock()
self.mock_evdev.InputDevice = MagicMock()
self.mock_evdev.ecodes.EV_KEY = 1
# Create mock backend module
self.mock_evdev_backend = MagicMock()
self.mock_evdev_backend.EVDEV_AVAILABLE = True
self.mock_evdev_backend.evdev = self.mock_evdev
self.mock_evdev_backend.InputDevice = self.mock_evdev.InputDevice
self.mock_evdev_backend.ecodes = self.mock_evdev.ecodes
self.mock_evdev_backend.categorize = self.mock_evdev.categorize
self.mock_evdev_backend.find_keyboard_devices = MagicMock(return_value=[])
# Inject into sys.modules
sys.modules["vocalinux.ui.keyboard_backends.evdev_backend"] = self.mock_evdev_backend
sys.modules["evdev"] = self.mock_evdev
# Need to reload the keyboard_backends module to pick up the mock
import importlib
from vocalinux.ui import keyboard_backends
importlib.reload(keyboard_backends)
self.keyboard_backends = keyboard_backends
def tearDown(self):
"""Clean up after evdev tests."""
import importlib
import sys
from vocalinux.ui import keyboard_backends
# Remove mock modules
sys.modules.pop("vocalinux.ui.keyboard_backends.evdev_backend", None)
sys.modules.pop("evdev", None)
# Reload to restore original state
importlib.reload(keyboard_backends)
def test_evdev_backend_no_devices(self):
"""Test evdev backend when no keyboard devices are found."""
# Set up mock to return no devices
self.mock_evdev_backend.find_keyboard_devices.return_value = []
self.mock_evdev_backend.EvdevKeyboardBackend = MagicMock
# Create backend instance
backend = MagicMock()
backend.is_available.return_value = False
# Should not be available when no devices found
self.assertFalse(backend.is_available())
def test_evdev_backend_with_devices(self):
"""Test evdev backend when devices are found."""
# Mock finding devices
self.mock_evdev_backend.find_keyboard_devices.return_value = ["/dev/input/event0"]
# Create a mock backend instance
backend = MagicMock()
backend.is_available.return_value = True
# Should be available when devices are found
self.assertTrue(backend.is_available())
class TestBackendFactory(unittest.TestCase):
"""Test cases for the backend factory system."""
def test_detect_x11_session(self):
"""Test detection of X11 session."""
from vocalinux.ui.keyboard_backends import DesktopEnvironment
with patch.dict("os.environ", {"XDG_SESSION_TYPE": "x11"}):
self.assertEqual(DesktopEnvironment.detect(), DesktopEnvironment.X11)
def test_detect_wayland_session(self):
"""Test detection of Wayland session."""
from vocalinux.ui.keyboard_backends import DesktopEnvironment
with patch.dict("os.environ", {"XDG_SESSION_TYPE": "wayland"}):
self.assertEqual(DesktopEnvironment.detect(), DesktopEnvironment.WAYLAND)
def test_detect_session_fallback_to_wayland_display(self):
"""Test session detection fallback to WAYLAND_DISPLAY."""
from vocalinux.ui.keyboard_backends import DesktopEnvironment
with patch.dict("os.environ", {"WAYLAND_DISPLAY": "wayland-0"}, clear=True):
self.assertEqual(DesktopEnvironment.detect(), DesktopEnvironment.WAYLAND)
def test_detect_session_fallback_to_display(self):
"""Test session detection fallback to DISPLAY."""
from vocalinux.ui.keyboard_backends import DesktopEnvironment
with patch.dict("os.environ", {"DISPLAY": ":0"}, clear=True):
self.assertEqual(DesktopEnvironment.detect(), DesktopEnvironment.X11)
def test_preferred_backend_pynput(self):
"""Test forcing pynput backend."""
from vocalinux.ui.keyboard_backends import create_backend
with patch("vocalinux.ui.keyboard_backends.PYNPUT_AVAILABLE", True), patch(
"vocalinux.ui.keyboard_backends.PynputKeyboardBackend"
) as MockPynput:
mock_backend = MagicMock()
MockPynput.return_value = mock_backend
result = create_backend(preferred_backend="pynput")
self.assertIsNotNone(result)
MockPynput.assert_called_once()
def test_preferred_backend_evdev(self):
"""Test forcing evdev backend."""
from vocalinux.ui.keyboard_backends import create_backend
with patch("vocalinux.ui.keyboard_backends.EVDEV_AVAILABLE", True), patch(
"vocalinux.ui.keyboard_backends.EvdevKeyboardBackend"
) as MockEvdev:
mock_backend = MagicMock()
MockEvdev.return_value = mock_backend
result = create_backend(preferred_backend="evdev")
self.assertIsNotNone(result)
MockEvdev.assert_called_once()
if __name__ == "__main__":
unittest.main()