#[path = "../../../os-partitions-view/src/lib.rs"]
mod view;

#[test]
fn os_partitions_view_positive() {
    let partition = view::View::new(101, 1947, 2048).unwrap();
    assert_eq!(partition.end_lba, 2048);
    assert_eq!(partition.translate(0, 1), Ok((101, 1)));
    assert_eq!(partition.translate(1946, 1), Ok((2047, 1)));
    assert_eq!(partition.translate(1945, 2), Ok((2046, 2)));
    let mut calls = 0;
    let mut last = None;
    let result = partition.read(1946, 1, |lba, count| {
        calls += 1;
        last = Some((lba, count));
        Ok::<(), ()>(())
    });
    assert_eq!(result, Ok(()));
    assert_eq!(calls, 1);
    assert_eq!(last, Some((2047, 1)));
}

#[test]
fn os_partitions_view_negative() {
    let partition = view::View::new(101, 100, 2048).unwrap();
    let before = partition;
    let mut calls = 0;
    for (lba, count, expected) in [
        (100, 1, view::Error::OutsidePartition),
        (99, 2, view::Error::OutsidePartition),
        (0, 0, view::Error::EmptyRead),
        (u64::MAX, 2, view::Error::Overflow),
    ] {
        let result = partition.read(lba, count, |_physical, _count| {
            calls += 1;
            Ok::<(), ()>(())
        });
        assert_eq!(result, Err(view::ReadError::View(expected)));
        assert_eq!(partition, before);
    }
    assert_eq!(calls, 0);
    assert_eq!(view::View::new(1, 0, 2048), Err(view::Error::EmptyPartition));
    assert_eq!(view::View::new(2047, 2, 2048), Err(view::Error::OutsideDevice));
    assert_eq!(view::View::new(u64::MAX, 2, 2048), Err(view::Error::Overflow));
    assert_eq!(view::View::new(1, 1, 0), Err(view::Error::EmptyDevice));
}