Add sensor tests for APSystems (#117512)

tests/components/apsystems/test_sensor.py

@@ -0,0 +1,31 @@
+"""Test the APSystem sensor module."""
+
+from unittest.mock import AsyncMock, patch
+
+from syrupy import SnapshotAssertion
+
+from homeassistant.const import Platform
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers import entity_registry as er
+
+from . import setup_integration
+
+from tests.common import MockConfigEntry, snapshot_platform
+
+
+async def test_all_entities(
+    hass: HomeAssistant,
+    snapshot: SnapshotAssertion,
+    mock_apsystems: AsyncMock,
+    mock_config_entry: MockConfigEntry,
+    entity_registry: er.EntityRegistry,
+) -> None:
+    """Test all entities."""
+    with patch(
+        "homeassistant.components.apsystems.PLATFORMS",
+        [Platform.SENSOR],
+    ):
+        await setup_integration(hass, mock_config_entry)
+        await snapshot_platform(
+            hass, entity_registry, snapshot, mock_config_entry.entry_id
+        )