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#[derive(PartialEq, Eq, PartialOrd, Ord, Debug, Clone, Copy)] pub enum Level { Info = 1, Debug = 2, Trace = 3, } #[cfg(test)] mod test { use super::*; #[test] fn ordering() { let mut levels = vec![ Level::Trace, Level::Debug, Level::Info, Level::Debug, Level::Trace, ]; levels.sort(); assert_eq!( levels, vec![ Level::Info, Level::Debug, Level::Debug, Level::Trace, Level::Trace ] ); } }