Add Tailscale integration (#59764)

* Add Tailscale integration

* Use DeviceEntryType

* Fix tests

* Adjust to new Pylint version

* Use enums for device classes

* Update homeassistant/components/tailscale/config_flow.py

Co-authored-by: Martin Hjelmare <marhje52@gmail.com>

* Pass empty string as default

Co-authored-by: Martin Hjelmare <marhje52@gmail.com>

tests/components/tailscale/test_init.py

@@ -0,0 +1,72 @@
+"""Tests for the Tailscale integration."""
+from unittest.mock import MagicMock
+
+from tailscale import TailscaleAuthenticationError, TailscaleConnectionError
+
+from homeassistant.components.tailscale.const import DOMAIN
+from homeassistant.config_entries import SOURCE_REAUTH, ConfigEntryState
+from homeassistant.core import HomeAssistant
+
+from tests.common import MockConfigEntry
+
+
+async def test_load_unload_config_entry(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    mock_tailscale: MagicMock,
+) -> None:
+    """Test the Tailscale configuration entry loading/unloading."""
+    mock_config_entry.add_to_hass(hass)
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    assert mock_config_entry.state is ConfigEntryState.LOADED
+
+    await hass.config_entries.async_unload(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    assert not hass.data.get(DOMAIN)
+    assert mock_config_entry.state is ConfigEntryState.NOT_LOADED
+
+
+async def test_config_entry_not_ready(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    mock_tailscale: MagicMock,
+) -> None:
+    """Test the Tailscale configuration entry not ready."""
+    mock_tailscale.devices.side_effect = TailscaleConnectionError
+
+    mock_config_entry.add_to_hass(hass)
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    assert len(mock_tailscale.devices.mock_calls) == 1
+    assert mock_config_entry.state is ConfigEntryState.SETUP_RETRY
+
+
+async def test_config_entry_authentication_failed(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    mock_tailscale: MagicMock,
+) -> None:
+    """Test trigger reauthentication flow."""
+    mock_config_entry.add_to_hass(hass)
+
+    mock_tailscale.devices.side_effect = TailscaleAuthenticationError
+
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    assert mock_config_entry.state is ConfigEntryState.SETUP_ERROR
+
+    flows = hass.config_entries.flow.async_progress()
+    assert len(flows) == 1
+
+    flow = flows[0]
+    assert flow.get("step_id") == "reauth_confirm"
+    assert flow.get("handler") == DOMAIN
+
+    assert "context" in flow
+    assert flow["context"].get("source") == SOURCE_REAUTH
+    assert flow["context"].get("entry_id") == mock_config_entry.entry_id