#[path = "../../../os-turkfs-journal/src/reservation.rs"]
mod reservation;
use reservation::{Error, Space};

#[test]
fn os_turkfs_journal_reservation_positive() {
    let mut space = Space::new(9, 4).unwrap();
    let last = space.reserve(3).unwrap();
    assert_eq!((last.start, last.slots, last.records), (4, 5, 3));
    assert_eq!(space.used(), 9);
    assert_eq!(space.remaining(), 0);
    let mut small = Space::new(9, 0).unwrap();
    assert_eq!(small.reserve(1).unwrap().start, 0);
    assert_eq!(small.reserve(1).unwrap().start, 3);
    assert_eq!(small.reserve(1).unwrap().start, 6);
    assert_eq!(small.remaining(), 0);
}

#[test]
fn os_turkfs_journal_reservation_negative() {
    let mut short = Space::new(8, 4).unwrap();
    let before = short;
    assert_eq!(short.reserve(3), Err(Error::Full));
    assert_eq!(short, before);
    assert_eq!(short.reserve(0), Err(Error::RecordCount));
    assert_eq!(short.reserve(4), Err(Error::RecordCount));
    assert_eq!(short, before);
    let mut end = Space::new(u16::MAX, u16::MAX - 1).unwrap();
    let before_end = end;
    assert_eq!(end.reserve(1), Err(Error::Full));
    assert_eq!(end, before_end);
    assert_eq!(Space::new(8, 9), Err(Error::Capacity));
}