Log error when integration is missing platform setup (#30690)

homeassistant/helpers/entity_platform.py

@@ -83,6 +83,16 @@ class EntityPlatform:
         platform = self.platform
         hass = self.hass
 
+        if not hasattr(platform, "async_setup_platform") and not hasattr(
+            platform, "setup_platform"
+        ):
+            self.logger.error(
+                "The %s platform for the %s integration does not support platform setup. Please remove it from your config.",
+                self.platform_name,
+                self.domain,
+            )
+            return
+
         @callback
         def async_create_setup_task():
             """Get task to set up platform."""

tests/helpers/test_entity_platform.py

@@ -834,3 +834,17 @@ async def test_override_restored_entities(hass):
 
     state = hass.states.get("test_domain.world")
     assert state.state == "on"
+
+
+async def test_platform_with_no_setup(hass, caplog):
+    """Test setting up a platform that doesnt' support setup."""
+    entity_platform = MockEntityPlatform(
+        hass, domain="mock-integration", platform_name="mock-platform", platform=None
+    )
+
+    await entity_platform.async_setup(None)
+
+    assert (
+        "The mock-platform platform for the mock-integration integration does not support platform setup."
+        in caplog.text
+    )