use std::fmt::Display;
use uuid::Uuid;
#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq, PartialOrd, Ord)]
pub struct EntryUuid(pub Uuid);
impl EntryUuid {
pub fn new_random() -> EntryUuid {
EntryUuid(Uuid::new_v4())
}
pub fn nil() -> EntryUuid {
EntryUuid(Uuid::nil())
}
}
impl Default for EntryUuid {
fn default() -> EntryUuid {
EntryUuid::nil()
}
}
impl Display for EntryUuid {
fn fmt(&self, f: &mut ::std::fmt::Formatter) -> Result<(), ::std::fmt::Error> {
f.write_str(self.0.to_string().as_str())
}
}
#[cfg(test)]
mod tests {
use super::*;
use uuid::Uuid;
#[test]
fn test_new_random_returns_random_entry_uuids() {
let a = EntryUuid::new_random();
let b = EntryUuid::new_random();
assert!(a != b);
}
#[test]
fn test_nil_returns_nil_uuid() {
let expected = Uuid::nil();
let actual = EntryUuid::nil().0;
assert_eq!(actual, expected);
}
#[test]
fn test_default_returns_nil_entry_uuid() {
let expected = EntryUuid::nil();
let actual = EntryUuid::default();
assert_eq!(actual, expected);
}
}