Add type hints to test_applications.py

[TechNiick]

Summary

Related to this
Type annotation added to test_applications.py

Checklist

• I understand that this PR may be closed in case there was no previous discussion. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.

[Kludex]

Please stop doing the multiline when not needed.

Suggested change

	from starlette.types import (
	ASGIApp,
	Receive,
	Scope,
	Send,
	)
	from starlette.types import ASGIApp, Receive, Scope, Send

[jonathanberthias]

@Kludex You might want to add skip-magic-trailing-comma to the Ruff formatter config, it would collapse multiline statements that fit on one line such as this one.

[Kludex]

Seprate PR welcome.

[Kludex]

Suggested change

	from typing import (
	Any,
	AsyncIterator,
	Callable,
	Generator,
	)
	from typing import Any, AsyncIterator, Callable, Generator

[Kludex]

Suggested change

	def test_middleware_stack_init(
	test_client_factory: TestClientFactory,
	) -> None:
	def test_middleware_stack_init(test_client_factory: TestClientFactory) -> None:

[Kludex]

Let's try to minimize the Anys. Can we remove this one?

[TechNiick]

If i remove any from exception_handlers: Any i get the following error:

error: Argument "exception_handlers" to "Starlette" has incompatible type "Dict[object, function]"; expected "Optional[Mapping[Any, Union[Callable[[Request, Exception], Union[Response, Awaitable[Response]]], Callable[[WebSocket, Exception], Awaitable[None]]]]]"

If I add exception_handlers: ExceptionHandlers i get the following errors:

Dict entry 0 has incompatible type "int": "Callable[[Request, HTTPException], Coroutine[Any, Any, JSONResponse]]"; expected "Any": "Union[Callable[[Request, Exception], Union[Response, Awaitable[Response]]], Callable[[WebSocket, Exception], Awaitable[None]]]"

Dict entry 1 has incompatible type "int": "Callable[[Request, HTTPException], Coroutine[Any, Any, JSONResponse]]"; expected "Any": "Union[Callable[[Request, Exception], Union[Response, Awaitable[Response]]], Callable[[WebSocket, Exception], Awaitable[None]]]"

Dict entry 2 has incompatible type "Type[HTTPException]": "Callable[[Request, HTTPException], Coroutine[Any, Any, JSONResponse]]"; expected "Any": "Union[Callable[[Request, Exception], Union[Response, Awaitable[Response]]], Callable[[WebSocket, Exception], Awaitable[None]]]"

Dict entry 3 has incompatible type "Type[CustomWSException]": "Callable[[WebSocket, CustomWSException], None]"; expected "Any": "Union[Callable[[Request, Exception], Union[Response, Awaitable[Response]]], Callable[[WebSocket, Exception], Awaitable[None]]]"

If I add exception_handlers: Mapping[Any, ExceptionHandler] as I saw in starlette/applications.py i get the same errors as above.

If I add exception_handlers: dict[ typing.Any, typing.Callable[[Request, Exception], Response] ] I get the following errors:

Dict entry 0 has incompatible type "int": "Callable[[Request, HTTPException], Coroutine[Any, Any, JSONResponse]]"; expected "Any": "Callable[[Request, Exception], Response]"

Dict entry 1 has incompatible type "int": "Callable[[Request, HTTPException], Coroutine[Any, Any, JSONResponse]]"; expected "Any": "Callable[[Request, Exception], Response]"

Dict entry 2 has incompatible type "Type[HTTPException]": "Callable[[Request, HTTPException], Coroutine[Any, Any, JSONResponse]]"; expected "Any": "Callable[[Request, Exception], Response]"

Dict entry 3 has incompatible type "Type[CustomWSException]": "Callable[[WebSocket, CustomWSException], None]"; expected "Any": "Callable[[Request, Exception], Response]"

I have searched everywhere related to exception_handlers type hints but this is all I could find and it looks like nothing is working. That's why I have added any there. Do you have any idea on how to fix this?

[Kludex]

I'd prefer the type: ignore than Any.

[Kludex]

Anys need to be removed.

[Kludex]

remove the anys plz

Suggested change

	async def lifespan(app: ASGIApp) -> Any:
	async def lifespan(app: ASGIApp) -> Iterator[None]: