[dashboard] Replace polling with WebSocket for real-time updates (#10893)

tests/dashboard/conftest.py

@@ -2,20 +2,42 @@
 
 from __future__ import annotations
 
-from unittest.mock import Mock
+from pathlib import Path
+from unittest.mock import MagicMock, Mock
 
 import pytest
+import pytest_asyncio
 
 from esphome.dashboard.core import ESPHomeDashboard
+from esphome.dashboard.entries import DashboardEntries
 
 
 @pytest.fixture
-def mock_dashboard() -> Mock:
+def mock_settings(tmp_path: Path) -> MagicMock:
+    """Create mock dashboard settings."""
+    settings = MagicMock()
+    settings.config_dir = str(tmp_path)
+    settings.absolute_config_dir = tmp_path
+    return settings
+
+
+@pytest.fixture
+def mock_dashboard(mock_settings: MagicMock) -> Mock:
     """Create a mock dashboard."""
     dashboard = Mock(spec=ESPHomeDashboard)
+    dashboard.settings = mock_settings
     dashboard.entries = Mock()
     dashboard.entries.async_all.return_value = []
     dashboard.stop_event = Mock()
     dashboard.stop_event.is_set.return_value = True
     dashboard.ping_request = Mock()
+    dashboard.ignored_devices = set()
+    dashboard.bus = Mock()
+    dashboard.bus.async_fire = Mock()
     return dashboard
+
+
+@pytest_asyncio.fixture
+async def dashboard_entries(mock_dashboard: Mock) -> DashboardEntries:
+    """Create a DashboardEntries instance for testing."""
+    return DashboardEntries(mock_dashboard)