ESPHome: Use MAC as unique ID (#83741)

* ESPHome: Use MAC as unique ID

* Normalize incoming zeroconf/dhcp macs

* Update comment

* Test ESPHome without mac in zeroconf

* Use format_mac

* Remove unique ID index from DomainData

tests/components/esphome/conftest.py

@@ -1,5 +1,11 @@
 """esphome session fixtures."""
+from __future__ import annotations
+
+from unittest.mock import AsyncMock, Mock, patch
+
+from aioesphomeapi import APIClient
 import pytest
+from zeroconf import Zeroconf
 
 from homeassistant.components.esphome import CONF_NOISE_PSK, DOMAIN
 from homeassistant.const import CONF_HOST, CONF_PASSWORD, CONF_PORT
@@ -25,7 +31,7 @@ def mock_config_entry() -> MockConfigEntry:
             CONF_PASSWORD: "pwd",
             CONF_NOISE_PSK: "12345678123456781234567812345678",
         },
-        unique_id="esphome-device",
+        unique_id="11:22:33:44:55:aa",
     )
 
 
@@ -40,3 +46,37 @@ async def init_integration(
     await hass.async_block_till_done()
 
     return mock_config_entry
+
+
+@pytest.fixture
+def mock_client():
+    """Mock APIClient."""
+    mock_client = Mock(spec=APIClient)
+
+    def mock_constructor(
+        address: str,
+        port: int,
+        password: str | None,
+        *,
+        client_info: str = "aioesphomeapi",
+        keepalive: float = 15.0,
+        zeroconf_instance: Zeroconf = None,
+        noise_psk: str | None = None,
+        expected_name: str | None = None,
+    ):
+        """Fake the client constructor."""
+        mock_client.host = address
+        mock_client.port = port
+        mock_client.password = password
+        mock_client.zeroconf_instance = zeroconf_instance
+        mock_client.noise_psk = noise_psk
+        return mock_client
+
+    mock_client.side_effect = mock_constructor
+    mock_client.connect = AsyncMock()
+    mock_client.disconnect = AsyncMock()
+
+    with patch("homeassistant.components.esphome.APIClient", mock_client), patch(
+        "homeassistant.components.esphome.config_flow.APIClient", mock_client
+    ):
+        yield mock_client