Use snapshot assertion for Cpuspeed diagnostics test (#98907)

tests/components/cpuspeed/snapshots/test_diagnostics.ambr

@@ -0,0 +1,15 @@
+# serializer version: 1
+# name: test_diagnostics
+  dict({
+    'arch_string_raw': 'aargh',
+    'brand_raw': 'Intel Ryzen 7',
+    'hz_actual': list([
+      3200000001,
+      0,
+    ]),
+    'hz_advertised': list([
+      3600000001,
+      0,
+    ]),
+  })
+# ---

tests/components/cpuspeed/test_diagnostics.py

@@ -1,6 +1,8 @@
 """Tests for the diagnostics data provided by the CPU Speed integration."""
 from unittest.mock import patch
 
+from syrupy import SnapshotAssertion
+
 from homeassistant.core import HomeAssistant
 
 from tests.common import MockConfigEntry
@@ -12,6 +14,7 @@ async def test_diagnostics(
     hass: HomeAssistant,
     hass_client: ClientSessionGenerator,
     init_integration: MockConfigEntry,
+    snapshot: SnapshotAssertion,
 ) -> None:
     """Test diagnostics."""
     info = {
@@ -25,11 +28,7 @@ async def test_diagnostics(
         "homeassistant.components.cpuspeed.diagnostics.cpuinfo.get_cpu_info",
         return_value=info,
     ):
-        assert await get_diagnostics_for_config_entry(
-            hass, hass_client, init_integration
-        ) == {
-            "hz_actual": [3200000001, 0],
-            "arch_string_raw": "aargh",
-            "brand_raw": "Intel Ryzen 7",
-            "hz_advertised": [3600000001, 0],
-        }
+        assert (
+            await get_diagnostics_for_config_entry(hass, hass_client, init_integration)
+            == snapshot
+        )