Add integration tests for host (#8912)

tests/integration/test_host_mode_basic.py

@@ -0,0 +1,22 @@
+"""Basic integration test for Host mode."""
+
+from __future__ import annotations
+
+import pytest
+
+from .types import APIClientConnectedFactory, RunCompiledFunction
+
+
+@pytest.mark.asyncio
+async def test_host_mode_basic(
+    yaml_config: str,
+    run_compiled: RunCompiledFunction,
+    api_client_connected: APIClientConnectedFactory,
+) -> None:
+    """Test basic Host mode functionality with API connection."""
+    # Write, compile and run the ESPHome device, then connect to API
+    async with run_compiled(yaml_config), api_client_connected() as client:
+        # Verify we can get device info
+        device_info = await client.device_info()
+        assert device_info is not None
+        assert device_info.name == "host-test"