feat: Implement asynchronous update check on startup with UI integration

tests/unit/test_startup_check.py

@@ -0,0 +1,128 @@
+"""Tests for update startup check functionality."""
+
+from pathlib import Path
+from unittest.mock import AsyncMock, MagicMock, patch
+
+import pytest
+
+from webdrop_bridge.config import Config
+from webdrop_bridge.ui.main_window import UpdateCheckWorker
+
+
+@pytest.fixture
+def sample_config(tmp_path):
+    """Create a sample config for testing."""
+    return Config(
+        app_name="Test WebDrop",
+        app_version="1.0.0",
+        log_level="INFO",
+        log_file=None,
+        allowed_roots=[tmp_path],
+        allowed_urls=[],
+        webapp_url="file:///./webapp/index.html",
+        window_width=800,
+        window_height=600,
+        enable_logging=False,
+    )
+
+
+class TestUpdateCheckWorker:
+    """Tests for UpdateCheckWorker."""
+
+    def test_worker_initialization(self):
+        """Test worker can be initialized."""
+        manager = MagicMock()
+        worker = UpdateCheckWorker(manager, "0.0.1")
+        
+        assert worker.manager is manager
+        assert worker.current_version == "0.0.1"
+
+    def test_worker_has_signals(self):
+        """Test worker has required signals."""
+        manager = MagicMock()
+        worker = UpdateCheckWorker(manager, "0.0.1")
+        
+        assert hasattr(worker, "update_available")
+        assert hasattr(worker, "update_status")
+        assert hasattr(worker, "finished")
+
+    def test_worker_run_method_exists(self):
+        """Test worker has run method."""
+        manager = MagicMock()
+        worker = UpdateCheckWorker(manager, "0.0.1")
+        
+        assert hasattr(worker, "run")
+        assert callable(worker.run)
+
+
+class TestMainWindowStartupCheck:
+    """Test startup check integration in MainWindow."""
+
+    def test_window_has_startup_check_method(self, qtbot, sample_config):
+        """Test MainWindow has check_for_updates_startup method."""
+        from webdrop_bridge.ui.main_window import MainWindow
+        
+        window = MainWindow(sample_config)
+        qtbot.addWidget(window)
+        
+        assert hasattr(window, "check_for_updates_startup")
+        assert callable(window.check_for_updates_startup)
+
+    def test_window_has_update_available_signal(self, qtbot, sample_config):
+        """Test MainWindow has update_available signal."""
+        from webdrop_bridge.ui.main_window import MainWindow
+        
+        window = MainWindow(sample_config)
+        qtbot.addWidget(window)
+        
+        assert hasattr(window, "update_available")
+
+    def test_startup_check_initializes_without_error(self, qtbot, sample_config):
+        """Test startup check can be called without raising."""
+        from webdrop_bridge.ui.main_window import MainWindow
+        
+        window = MainWindow(sample_config)
+        qtbot.addWidget(window)
+        
+        # Should not raise
+        window.check_for_updates_startup()
+
+    def test_on_update_status_updates_status_bar(self, qtbot, sample_config):
+        """Test _on_update_status updates the status bar."""
+        from webdrop_bridge.ui.main_window import MainWindow
+        
+        window = MainWindow(sample_config)
+        qtbot.addWidget(window)
+        
+        window._on_update_status("Testing", "✓")
+        assert "Testing" in window.update_status_label.text()
+        assert "✓" in window.update_status_label.text()
+
+    def test_on_update_available_emits_signal(self, qtbot, sample_config):
+        """Test _on_update_available emits update_available signal."""
+        from webdrop_bridge.ui.main_window import MainWindow
+        
+        window = MainWindow(sample_config)
+        qtbot.addWidget(window)
+        
+        # Create mock release
+        mock_release = MagicMock()
+        mock_release.version = "0.0.2"
+        
+        with qtbot.waitSignal(window.update_available):
+            window._on_update_available(mock_release)
+
+    def test_on_update_available_updates_status(self, qtbot, sample_config):
+        """Test _on_update_available updates status bar."""
+        from webdrop_bridge.ui.main_window import MainWindow
+        
+        window = MainWindow(sample_config)
+        qtbot.addWidget(window)
+        
+        # Create mock release
+        mock_release = MagicMock()
+        mock_release.version = "0.0.2"
+        
+        window._on_update_available(mock_release)
+        assert "0.0.2" in window.update_status_label.text()
+        assert "✅" in window.update_status_label.text()