Add reauth flow to webOS TV integration (#86168)

* Add reauth flow to webOS TV integration

* Remove unnecessary else

tests/components/webostv/test_init.py

@@ -0,0 +1,39 @@
+"""The tests for the LG webOS TV platform."""
+from unittest.mock import Mock
+
+from aiowebostv import WebOsTvPairError
+
+from homeassistant.components.webostv.const import DOMAIN
+from homeassistant.config_entries import SOURCE_REAUTH, ConfigEntryState
+from homeassistant.const import CONF_CLIENT_SECRET
+
+from . import setup_webostv
+
+
+async def test_reauth_setup_entry(hass, client, monkeypatch):
+    """Test reauth flow triggered by setup entry."""
+    monkeypatch.setattr(client, "is_connected", Mock(return_value=False))
+    monkeypatch.setattr(client, "connect", Mock(side_effect=WebOsTvPairError))
+    entry = await setup_webostv(hass)
+
+    assert entry.state == 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") == entry.entry_id
+
+
+async def test_key_update_setup_entry(hass, client, monkeypatch):
+    """Test key update from setup entry."""
+    monkeypatch.setattr(client, "client_key", "new_key")
+    entry = await setup_webostv(hass)
+
+    assert entry.state == ConfigEntryState.LOADED
+    assert entry.data[CONF_CLIENT_SECRET] == "new_key"