✅ Update tests

fastapi/routing.py

@@ -1,5 +1,6 @@
 import dataclasses
 import email.message
+import functools
 import inspect
 import json
 import sys
@@ -8,6 +9,7 @@ from enum import Enum, IntEnum
 from typing import (
     Any,
     AsyncIterator,
+    Awaitable,
     Callable,
     Collection,
     Coroutine,
@@ -59,6 +61,8 @@ from fastapi.utils import (
 )
 from pydantic import BaseModel
 from starlette import routing
+from starlette._exception_handler import wrap_app_handling_exceptions
+from starlette._utils import is_async_callable
 from starlette.concurrency import run_in_threadpool
 from starlette.exceptions import HTTPException
 from starlette.requests import Request
@@ -68,11 +72,9 @@ from starlette.routing import (
     Match,
     compile_path,
     get_name,
-    request_response,
-    websocket_session,
 )
 from starlette.routing import Mount as Mount  # noqa
-from starlette.types import AppType, ASGIApp, Lifespan, Scope
+from starlette.types import AppType, ASGIApp, Lifespan, Receive, Scope, Send
 from starlette.websockets import WebSocket
 from typing_extensions import Annotated, Doc, deprecated
 
@@ -246,7 +248,12 @@ def get_request_handler(
 
     async def app(request: Request) -> Response:
         response: Union[Response, None] = None
-        async with AsyncExitStack() as file_stack:
+        file_stack = request.scope.get("fastapi_middleware_astack")
+        assert isinstance(
+            file_stack, AsyncExitStack
+        ), "fastapi_astack not found in request scope"
+
+        # Read body and auto-close files
         try:
             body: Any = None
             if body_field:
@@ -293,8 +300,13 @@ def get_request_handler(
                 status_code=400, detail="There was an error parsing the body"
             )
             raise http_error from e
+
+        # Solve dependencies and run path operation function, auto-closing dependencies
         errors: List[Any] = []
-            async with AsyncExitStack() as async_exit_stack:
+        async_exit_stack = request.scope.get("fastapi_inner_astack")
+        assert isinstance(
+            async_exit_stack, AsyncExitStack
+        ), "fastapi_inner_astack not found in request scope"
         solved_result = await solve_dependencies(
             request=request,
             dependant=dependant,
@@ -321,16 +333,12 @@ def get_request_handler(
                 # If status_code was set, use it, otherwise use the default from the
                 # response class, in the case of redirect it's 307
                 current_status_code = (
-                            status_code
+                    status_code if status_code else solved_result.response.status_code
-                            if status_code
-                            else solved_result.response.status_code
                 )
                 if current_status_code is not None:
                     response_args["status_code"] = current_status_code
                 if solved_result.response.status_code:
-                            response_args["status_code"] = (
+                    response_args["status_code"] = solved_result.response.status_code
-                                solved_result.response.status_code
-                            )
                 content = await serialize_response(
                     field=response_field,
                     response_content=raw_response,
@@ -351,6 +359,8 @@ def get_request_handler(
                 _normalize_errors(errors), body=body
             )
             raise validation_error
+
+        # Return response
         if response is None:
             raise FastAPIError(
                 "No response object was returned. There's a high chance that the "
@@ -370,11 +380,10 @@ def get_websocket_app(
     embed_body_fields: bool = False,
 ) -> Callable[[WebSocket], Coroutine[Any, Any, Any]]:
     async def app(websocket: WebSocket) -> None:
-        async with AsyncExitStack() as async_exit_stack:
+        async_exit_stack = websocket.scope.get("fastapi_inner_astack")
-            # TODO: remove this scope later, after a few releases
+        assert isinstance(
-            # This scope fastapi_astack is no longer used by FastAPI, kept for
+            async_exit_stack, AsyncExitStack
-            # compatibility, just in case
+        ), "fastapi_inner_astack not found in request scope"
-            websocket.scope["fastapi_astack"] = async_exit_stack
         solved_result = await solve_dependencies(
             request=websocket,
             dependant=dependant,

tests/test_tutorial/test_dependencies/test_tutorial008c.py

@@ -40,7 +40,7 @@ def test_fastapi_error(mod: ModuleType):
     client = TestClient(mod.app)
     with pytest.raises(FastAPIError) as exc_info:
         client.get("/items/portal-gun")
-    assert "No response object was returned" in exc_info.value.args[0]
+    assert "raising an exception and a dependency with yield" in exc_info.value.args[0]
 
 
 def test_internal_server_error(mod: ModuleType):