Method __call__

tests/test_applications.py:515–517

(self, scope: Scope, receive: Receive, send: Send)

            self.arg = arg

        async def __call__(self, scope: Scope, receive: Receive, send: Send) -> None:
            calls.append(self.arg)
            await self.app(scope, receive, send)

    app = Starlette()
    app.add_middleware(MiddlewareWithArgs, "foo")