Add snapshot testing to Tessie (home-assistant#108346)

* Redo Binary Sensors

* Redo Button

* Redo Climate

* Stage unfixed platforms

* Redo Cover

* Redo device tracker

* Redo lock

* Redo Media Player

* Redo Number

* Redo Select

* Redo Sensor

* Redo Switch

* Redo Update

* Fix setup_platform

* Add mixing snapshot

* Fix config flow

* Centralise entity testing

* Update snapshot

* Rename test_entities

* Fix assert_entities

tests/components/tessie/common.py

@@ -5,10 +5,12 @@
 
 from aiohttp import ClientConnectionError, ClientResponseError
 from aiohttp.client import RequestInfo
+from syrupy import SnapshotAssertion
 
 from homeassistant.components.tessie.const import DOMAIN, TessieStatus
-from homeassistant.const import CONF_ACCESS_TOKEN
+from homeassistant.const import CONF_ACCESS_TOKEN, Platform
 from homeassistant.core import HomeAssistant
+from homeassistant.helpers import entity_registry as er
 
 from tests.common import MockConfigEntry, load_json_object_fixture
 
@@ -44,7 +46,9 @@
 ERROR_CONNECTION = ClientConnectionError()
 
 
-async def setup_platform(hass: HomeAssistant, side_effect=None):
+async def setup_platform(
+    hass: HomeAssistant, platforms: list[Platform] = [], side_effect=None
+) -> MockConfigEntry:
     """Set up the Tessie platform."""
 
     mock_entry = MockConfigEntry(
@@ -57,8 +61,24 @@ async def setup_platform(hass: HomeAssistant, side_effect=None):
         "homeassistant.components.tessie.get_state_of_all_vehicles",
         return_value=TEST_STATE_OF_ALL_VEHICLES,
         side_effect=side_effect,
-    ):
+    ), patch("homeassistant.components.tessie.PLATFORMS", platforms):
         await hass.config_entries.async_setup(mock_entry.entry_id)
         await hass.async_block_till_done()
 
     return mock_entry
+
+
+def assert_entities(
+    hass: HomeAssistant,
+    entry_id: str,
+    entity_registry: er.EntityRegistry,
+    snapshot: SnapshotAssertion,
+) -> None:
+    """Test that all entities match their snapshot."""
+    entity_entries = er.async_entries_for_config_entry(entity_registry, entry_id)
+
+    assert entity_entries
+    for entity_entry in entity_entries:
+        assert entity_entry == snapshot(name=f"{entity_entry.entity_id}-entry")
+        assert (state := hass.states.get(entity_entry.entity_id))
+        assert state == snapshot(name=f"{entity_entry.entity_id}-state")