use std::{error::Error, fmt};

#[derive(Debug)]
pub struct MTTError {
    detail: String,
}

impl MTTError {
    fn new(detail: &str) -> Self {
        Self {
            detail: detail.to_string(),
        }
    }
}

impl fmt::Display for MTTError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{}", self.detail)
    }
}

impl Error for MTTError {}

#[cfg(test)]
mod errors {
    use super::*;

    #[test]
    fn new_error() {
        let detail = "new error";
        let err = MTTError::new(detail);
        assert!(
            err.to_string() == detail,
            "\n\nGot:  {}\nWant: {}\n\n",
            err.to_string(),
            detail
        );
    }
}