fn assert_err_display<T: std::fmt::Debug, E: std::error::Error>(res: Result<T, E>, expected: impl AsRef<str>) {    match res {        Ok(v) => assert!(false, "Expected error '{}', got value {:?}", expected.as_ref(), v),        Err(err) => assert_eq!(err.to_string(), expected.as_ref()),    }} mod decode;mod encode;mod reader;mod write;