syd 3.52.0

rock-solid application kernel
Documentation 
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//! Error handling.

use nix::errno::Errno;

/// Library errors.
#[derive(Debug)]
pub struct CapsError(pub Errno);

impl std::fmt::Display for CapsError {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        write!(f, "caps error: {}", self.0)
    }
}

impl std::error::Error for CapsError {}

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

    #[test]
    fn test_capserror_1() {
        let e = CapsError(Errno::EPERM);
        let s = e.to_string();
        assert!(s.contains("caps error"));
    }

    #[test]
    fn test_capserror_2() {
        let e = CapsError(Errno::EINVAL);
        let s = e.to_string();
        assert!(s.contains("caps error"));
    }

    #[test]
    fn test_capserror_3() {
        let e = CapsError(Errno::ENOTSUP);
        let s = e.to_string();
        assert!(!s.is_empty());
    }
}