roaring 0.10.5

extern crate roaring;
use roaring::RoaringBitmap;

#[test]
fn smoke() {
    let mut bitmap = RoaringBitmap::new();
    assert_eq!(bitmap.len(), 0);
    assert!(bitmap.is_empty());
    bitmap.remove(0);
    assert_eq!(bitmap.len(), 0);
    assert!(bitmap.is_empty());
    bitmap.insert(1);
    assert!(bitmap.contains(1));
    assert_eq!(bitmap.len(), 1);
    assert!(!bitmap.is_empty());
    bitmap.insert(u32::MAX - 2);
    assert!(bitmap.contains(u32::MAX - 2));
    assert_eq!(bitmap.len(), 2);
    bitmap.insert(u32::MAX);
    assert!(bitmap.contains(u32::MAX));
    assert_eq!(bitmap.len(), 3);
    bitmap.insert(2);
    assert!(bitmap.contains(2));
    assert_eq!(bitmap.len(), 4);
    bitmap.remove(2);
    assert!(!bitmap.contains(2));
    assert_eq!(bitmap.len(), 3);
    assert!(!bitmap.contains(0));
    assert!(bitmap.contains(1));
    assert!(!bitmap.contains(100));
    assert!(bitmap.contains(u32::MAX - 2));
    assert!(!bitmap.contains(u32::MAX - 1));
    assert!(bitmap.contains(u32::MAX));
}

#[test]
fn remove_range() {
    let ranges = [0u32, 1, 63, 64, 65, 100, 4096 - 1, 4096, 4096 + 1, 65536 - 1, 65536, 65536 + 1];
    for (i, &a) in ranges.iter().enumerate() {
        for &b in &ranges[i..] {
            let mut bitmap = (0..=65536).collect::<RoaringBitmap>();
            assert_eq!(bitmap.remove_range(a..b), u64::from(b - a));
            assert_eq!(bitmap, (0..a).chain(b..=65536).collect::<RoaringBitmap>());
        }
    }
}

#[test]
#[allow(clippy::range_plus_one)] // remove_range needs an exclusive range
fn remove_range_array() {
    let mut bitmap = (0..1000).collect::<RoaringBitmap>();
    for i in 0..1000 {
        assert_eq!(bitmap.remove_range(i..i), 0);
        assert_eq!(bitmap.remove_range(i..i + 1), 1);
    }

    // insert 0, 2, 4, ..
    // remove [0, 2), [2, 4), ..
    let mut bitmap = (0..1000).map(|x| x * 2).collect::<RoaringBitmap>();
    for i in 0..1000 {
        assert_eq!(bitmap.remove_range(i * 2..(i + 1) * 2), 1);
    }

    // remove [0, 2), [2, 4), ..
    let mut bitmap = (0..1000).collect::<RoaringBitmap>();
    for i in 0..1000 / 2 {
        assert_eq!(bitmap.remove_range(i * 2..(i + 1) * 2), 2);
    }
}

#[test]
#[allow(clippy::range_plus_one)] // remove_range needs an exclusive range
fn remove_range_bitmap() {
    let mut bitmap = (0..4096 + 1000).collect::<RoaringBitmap>();
    for i in 0..1000 {
        assert_eq!(bitmap.remove_range(i..i), 0);
        assert_eq!(bitmap.remove_range(i..i + 1), 1);
    }

    // insert 0, 2, 4, ..
    // remove [0, 2), [2, 4), ..
    let mut bitmap = ((0..4096 + 1000).map(|x| x * 2)).collect::<RoaringBitmap>();
    for i in 0..1000 {
        assert_eq!(bitmap.remove_range(i * 2..(i + 1) * 2), 1);
    }

    // remove [0, 2), [2, 4), ..
    let mut bitmap = (0..4096 + 1000).collect::<RoaringBitmap>();
    for i in 0..1000 / 2 {
        assert_eq!(bitmap.remove_range(i * 2..(i + 1) * 2), 2);
    }

    // remove [1, 3), [3, 5), ..
    let mut bitmap = (0..4096 + 1000).collect::<RoaringBitmap>();
    for i in 0..1000 / 2 {
        assert_eq!(bitmap.remove_range(i * 2 + 1..(i + 1) * 2 + 1), 2);
    }
}

#[test]
fn to_bitmap() {
    let bitmap = (0..5000).collect::<RoaringBitmap>();
    assert_eq!(bitmap.len(), 5000);
    for i in 1..5000 {
        assert!(bitmap.contains(i));
    }
    assert!(!bitmap.contains(5001));
}

#[test]
fn to_array() {
    let mut bitmap = (0..5000).collect::<RoaringBitmap>();
    for i in 3000..5000 {
        bitmap.remove(i);
    }
    assert_eq!(bitmap.len(), 3000);
    for i in 0..3000 {
        assert!(bitmap.contains(i));
    }
    for i in 3000..5000 {
        assert!(!bitmap.contains(i));
    }
}