You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: stream_type_reader.rs
    path of file: ./repos/neqo/neqo-http3/src
    
    the code of the file until where you have to start completion: // Licensed under the Apache 
    
    fn stream_fin_uknown() {
        let mut t = Test::new(StreamType::UniDi, Role::Client);
        t.decode(
            &[0x3fff_ffff_ffff_ffff],
            true,
            &Ok((ReceiveOutput::NewStream(NewStreamType::Unknown), true)),
            true,
        );

        let mut t = Test::new(StreamType::UniDi, Role::Client);
        // A stream ID of 0x3fff_ffff_ffff_ffff is encoded into [0xff; 8].
        // For this test the stream type is truncated.
        // This should cause an error.
        t.decode_buffer(&[0xff; 7], true, &Err(Error::HttpStreamCreation), true);
    }