#[path = "../../../os-turkfs-allocation/src/lib.rs"]
mod allocation;

#[test]
fn os_turkfs_allocation_inode_alloc_positive() {
    let mut slot = allocation::InodeSlot::new(5, 7).unwrap();
    let first = slot.allocate(11).unwrap();
    assert_eq!(slot.owner(first), Ok(11));
    assert_eq!(slot.allocate(22), Err(allocation::Error::Busy));
    slot.release(first).unwrap();
    assert!(!slot.live());
    assert_eq!(slot.generation(), 8);
    let second = slot.allocate(22).unwrap();
    assert_eq!(second.slot, first.slot);
    assert_eq!(second.generation, 8);
    assert_eq!(slot.owner(second), Ok(22));
}

#[test]
fn os_turkfs_allocation_inode_alloc_negative() {
    let mut slot = allocation::InodeSlot::new(5, 7).unwrap();
    let first = slot.allocate(11).unwrap();
    slot.release(first).unwrap();
    let second = slot.allocate(22).unwrap();
    let before = slot;
    assert_eq!(slot.owner(first), Err(allocation::Error::Stale));
    assert_eq!(slot.release(first), Err(allocation::Error::Stale));
    assert_eq!(slot, before);
    assert_eq!(slot.owner(second), Ok(22));
    let mut terminal = allocation::InodeSlot::new(6, u64::MAX).unwrap();
    let handle = terminal.allocate(33).unwrap();
    let before_terminal = terminal;
    assert_eq!(terminal.release(handle), Err(allocation::Error::GenerationOverflow));
    assert_eq!(terminal, before_terminal);
    assert_eq!(allocation::InodeSlot::new(0, 1),
        Err(allocation::Error::InvalidSlot));
}