#[path = "../../../os-turkfs-namespace/src/lib.rs"]
mod namespace;
use namespace::{Error, Kind, LinkCount, Namespace};

#[test]
fn os_turkfs_namespace_links_positive() {
    let mut ns = Namespace::<6>::new(6).unwrap();
    let file = ns.create(1, b"file", Kind::File).unwrap();
    let directory = ns.create(1, b"dir", Kind::Directory).unwrap();
    let bits = ns.allocated_bits();
    assert_eq!(ns.hardlink(1, b"file", directory, b"alias"), Ok(2));
    assert_eq!(ns.lookup(1, b"file").unwrap().inode, file);
    assert_eq!(ns.lookup(directory, b"alias").unwrap().inode, file);
    assert_eq!(ns.link_count(file), 2);
    assert_eq!(ns.allocated_bits(), bits);
    ns.rename(directory, b"alias", directory, b"renamed").unwrap();
    assert_eq!(ns.lookup(directory, b"alias"), None);
    assert_eq!(ns.lookup(directory, b"renamed").unwrap().inode, file);
    assert_eq!(ns.lookup(1, b"file").unwrap().inode, file);
    assert_eq!(ns.link_count(file), 2);
    assert_eq!(ns.allocated_bits(), bits);
}

#[test]
fn os_turkfs_namespace_links_negative() {
    let mut ns = Namespace::<6>::new(3).unwrap();
    let left = ns.create(1, b"left", Kind::Directory).unwrap();
    let right = ns.create(1, b"right", Kind::Directory).unwrap();
    ns.create(1, b"file", Kind::File).unwrap();
    let before = ns;
    assert_eq!(ns.hardlink(1, b"left", right, b"bad-parent"), Err(Error::DirectoryLink));
    assert_eq!(ns, before);
    assert_eq!(ns.lookup(right, b"bad-parent"), None);
    assert_eq!(ns.link_count(left), 1);
    assert_eq!(ns.hardlink(1, b"file", right, b"alias"), Err(Error::Quota));
    assert_eq!(ns.hardlink(1, b"file", 1, b"right"), Err(Error::Exists));
    assert_eq!(ns, before);
    let mut terminal = LinkCount::new(u16::MAX).unwrap();
    let before_count = terminal;
    assert_eq!(terminal.add(), Err(Error::LinkOverflow));
    assert_eq!(terminal, before_count);
    assert_eq!(LinkCount::new(0), Err(Error::InvalidLinkCount));
}