Raise an exception when calling removed Config.setup_event_loop() (#2709)

Author: Kludex

tests/test_config.py

@@ -585,3 +585,11 @@ def test_custom_loop__not_importable_custom_loop_setup_function(caplog: pytest.L
         'Error loading custom loop setup function. Attribute "non_existing_setup_function" not found in module "tests.test_config".'  # noqa: E501
         == error_messages.pop(0)
     )
+
+
+def test_setup_event_loop_is_removed(caplog: pytest.LogCaptureFixture) -> None:
+    config = Config(app=asgi_app)
+    with pytest.raises(
+        AttributeError, match="The `setup_event_loop` method was replaced by `get_loop_factory` in uvicorn 0.36.0."
+    ):
+        config.setup_event_loop()

uvicorn/config.py

@@ -473,9 +473,16 @@ def load(self) -> None:
 
         self.loaded = True
 
+    def setup_event_loop(self) -> None:
+        raise AttributeError(
+            "The `setup_event_loop` method was replaced by `get_loop_factory` in uvicorn 0.36.0.\n"
+            "None of those methods are supposed to be used directly. If you are doing it, please let me know here: "
+            "https://github.com/Kludex/uvicorn/discussions/2706. Thank you, and sorry for the inconvenience."
+        )
+
     def get_loop_factory(self) -> Callable[[], asyncio.AbstractEventLoop] | None:
         if self.loop in LOOP_FACTORIES:
-            loop_factory: Callable | None = import_from_string(LOOP_FACTORIES[self.loop])
+            loop_factory: Callable[..., Any] | None = import_from_string(LOOP_FACTORIES[self.loop])
         else:
             try:
                 return import_from_string(self.loop)