Add snapshot testing to YouTube (#96974)

tests/components/youtube/snapshots/test_sensor.ambr

@@ -0,0 +1,31 @@
+# serializer version: 1
+# name: test_sensor
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'entity_picture': 'https://i.ytimg.com/vi/wysukDrMdqU/sddefault.jpg',
+      'friendly_name': 'Google for Developers Latest upload',
+      'icon': 'mdi:youtube',
+      'video_id': 'wysukDrMdqU',
+    }),
+    'context': <ANY>,
+    'entity_id': 'sensor.google_for_developers_latest_upload',
+    'last_changed': <ANY>,
+    'last_updated': <ANY>,
+    'state': "What's new in Google Home in less than 1 minute",
+  })
+# ---
+# name: test_sensor.1
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'entity_picture': 'https://yt3.ggpht.com/fca_HuJ99xUxflWdex0XViC3NfctBFreIl8y4i9z411asnGTWY-Ql3MeH_ybA4kNaOjY7kyA=s800-c-k-c0x00ffffff-no-rj',
+      'friendly_name': 'Google for Developers Subscribers',
+      'icon': 'mdi:youtube-subscription',
+      'unit_of_measurement': 'subscribers',
+    }),
+    'context': <ANY>,
+    'entity_id': 'sensor.google_for_developers_subscribers',
+    'last_changed': <ANY>,
+    'last_updated': <ANY>,
+    'state': '2290000',
+  })
+# ---

tests/components/youtube/test_sensor.py

@@ -4,6 +4,7 @@ from unittest.mock import patch
 
 from google.auth.exceptions import RefreshError
 import pytest
+from syrupy import SnapshotAssertion
 
 from homeassistant import config_entries
 from homeassistant.components.youtube import DOMAIN
@@ -16,28 +17,17 @@ from .conftest import TOKEN, ComponentSetup
 from tests.common import async_fire_time_changed
 
 
-async def test_sensor(hass: HomeAssistant, setup_integration: ComponentSetup) -> None:
+async def test_sensor(
+    hass: HomeAssistant, snapshot: SnapshotAssertion, setup_integration: ComponentSetup
+) -> None:
     """Test sensor."""
     await setup_integration()
 
     state = hass.states.get("sensor.google_for_developers_latest_upload")
-    assert state
-    assert state.name == "Google for Developers Latest upload"
-    assert state.state == "What's new in Google Home in less than 1 minute"
-    assert (
-        state.attributes["entity_picture"]
-        == "https://i.ytimg.com/vi/wysukDrMdqU/sddefault.jpg"
-    )
-    assert state.attributes["video_id"] == "wysukDrMdqU"
+    assert state == snapshot
 
     state = hass.states.get("sensor.google_for_developers_subscribers")
-    assert state
-    assert state.name == "Google for Developers Subscribers"
-    assert state.state == "2290000"
-    assert (
-        state.attributes["entity_picture"]
-        == "https://yt3.ggpht.com/fca_HuJ99xUxflWdex0XViC3NfctBFreIl8y4i9z411asnGTWY-Ql3MeH_ybA4kNaOjY7kyA=s800-c-k-c0x00ffffff-no-rj"
-    )
+    assert state == snapshot
 
 
 async def test_sensor_updating(