// License: see LICENSE file at root directory of `master` branch

use dia_range::RangeIter;

#[test]
fn range_iter() {
    let mut iter = RangeIter::new(0, 1);
    assert_eq!(iter.next(), Some(0));
    assert_eq!(iter.next(), Some(1));
    assert_eq!(iter.next(), None);
    assert_eq!(iter.next_back(), None);

    let mut iter = RangeIter::new(0, 1);
    assert_eq!(iter.next_back(), Some(1));
    assert_eq!(iter.next_back(), Some(0));
    assert_eq!(iter.next_back(), None);
    assert_eq!(iter.next(), None);

    let mut iter = RangeIter::new(-3, 3);
    assert_eq!(iter.next(), Some(-3));
    assert_eq!(iter.next(), Some(-2));
    assert_eq!(iter.next(), Some(-1));
    assert_eq!(iter.next(), Some(0));
    assert_eq!(iter.next(), Some(1));
    assert_eq!(iter.next_back(), Some(3));
    assert_eq!(iter.next_back(), Some(2));
    assert_eq!(iter.next_back(), None);
    assert_eq!(iter.next(), None);

    assert_eq!(RangeIter::new(0_u8, 3).collect::<Vec<_>>(), (0..=3_u8).collect::<Vec<_>>());
    assert_eq!(RangeIter::new(0_u8, 3).rev().collect::<Vec<_>>(), (0..=3_u8).rev().collect::<Vec<_>>());
}