Function drink_next::mock_message

pub fn mock_message<Args: Decode, Ret: Encode, Body: Fn(Args) -> Ret + Send + Sync + 'static>(
    body: Body
) -> MessageMock

A helper function to create a message mock out of a typed closure.

In particular, it takes care of decoding the input and encoding the output. Also, wraps the return value in a Result, which is normally done implicitly by ink!.