rangetools 0.1.4

Extending the Rust Range structs found in std::ops
Documentation 
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use crate::{EmptyRange, Rangetools as _};

#[test]
fn range() {
    let i = (0..3).intersection(1..5);
    assert_eq!(i.into_iter().collect::<Vec<_>>(), vec![1, 2]);
    assert!(!i.contains(-1));
    assert!(!i.contains(0));
    assert!(i.contains(1));
    assert!(i.contains(2));
    assert!(!i.contains(3));
    assert!(!i.contains(4));
    assert!(!i.contains(5));
    assert!(!i.contains(6));
    assert!(!i.is_empty());
    assert!((0..10).intersection(10..20).is_empty());
}

#[test]
fn range_from() {
    let i = (0..5).intersection(3..);
    assert_eq!(i.into_iter().collect::<Vec<_>>(), vec![3, 4]);
    assert!(!i.contains(1));
    assert!(!i.contains(2));
    assert!(i.contains(3));
    assert!(i.contains(4));
    assert!(!i.contains(5));
    assert!(!i.contains(6));
    assert!(!i.is_empty());
    assert!((0..3).intersection(3..).is_empty());
}

#[test]
fn range_full() {
    let i = (0..5).intersection(..);
    assert_eq!(i.into_iter().collect::<Vec<_>>(), vec![0, 1, 2, 3, 4]);
    assert!(!i.contains(-1));
    assert!(i.contains(0));
    assert!(i.contains(1));
    assert!(i.contains(2));
    assert!(i.contains(3));
    assert!(i.contains(4));
    assert!(!i.contains(5));
    assert!(!i.contains(6));
    assert!(!i.is_empty());
    assert!(!(0..3).intersection(..).is_empty());
}

#[test]
fn range_inclusive() {
    let i = (0..5).intersection(1..=3);
    assert_eq!(i.into_iter().collect::<Vec<_>>(), vec![1, 2, 3]);
    assert!(!i.contains(0));
    assert!(!i.contains(0));
    assert!(i.contains(1));
    assert!(i.contains(2));
    assert!(i.contains(3));
    assert!(!i.contains(4));
    assert!(!i.contains(5));
    assert!(!i.contains(6));
    assert!(!i.is_empty());
    assert!((0..3).intersection(3..=5).is_empty());
}

#[test]
fn range_to() {
    let i = (0..5).intersection(..3);
    assert_eq!(i.into_iter().collect::<Vec<_>>(), vec![0, 1, 2]);
    assert!(!i.contains(-1));
    assert!(i.contains(0));
    assert!(i.contains(1));
    assert!(i.contains(2));
    assert!(!i.contains(3));
    assert!(!i.contains(4));
    assert!(!i.is_empty());
    assert!((5..10).intersection(..5).is_empty());
}

#[test]
fn range_to_inclusive() {
    let i = (0..5).intersection(..3);
    assert_eq!(i.into_iter().collect::<Vec<_>>(), vec![0, 1, 2]);
    assert!(!i.contains(-1));
    assert!(i.contains(0));
    assert!(i.contains(1));
    assert!(i.contains(2));
    assert!(!i.contains(3));
    assert!(!i.contains(4));
    assert!(!(i.is_empty()));
    assert!((5..10).intersection(0..=4).is_empty());
}

#[test]
fn bounded_range() {
    let i = (0..3).intersection((1..5).intersection(2..4));
    assert_eq!(i.into_iter().collect::<Vec<_>>(), vec![2]);
    assert!(!i.contains(0));
    assert!(!i.contains(1));
    assert!(i.contains(2));
    assert!(!i.contains(3));
    assert!(!i.contains(4));
    assert!(!i.contains(5));
    assert!(!i.is_empty());
    assert!((0..3)
        .intersection((10..20).intersection(15..17))
        .is_empty());
}

#[test]
fn lower_bounded_range() {
    let i = (0..3).intersection((1..).intersection(..));
    assert_eq!(i.into_iter().collect::<Vec<_>>(), vec![1, 2]);
    assert!(!i.contains(0));
    assert!(i.contains(1));
    assert!(i.contains(2));
    assert!(!i.contains(3));
    assert!(!i.contains(4));
    assert!(!i.contains(5));
    assert!(!i.is_empty());
    assert!((0..3).intersection((10..).intersection(..)).is_empty());
}

#[test]
fn upper_bounded_range() {
    let i = (0..3).intersection((..2).intersection(..));
    assert_eq!(i.into_iter().collect::<Vec<_>>(), vec![0, 1]);
    assert!(i.contains(0));
    assert!(i.contains(1));
    assert!(!i.contains(2));
    assert!(!i.contains(3));
    assert!(!i.contains(4));
    assert!(!i.contains(5));
    assert!(!i.is_empty());
    assert!((5..10).intersection((..3).intersection(..)).is_empty());
}

#[test]
fn unbounded_range() {
    let i = (0..3).intersection((..).intersection(..));
    assert!(!i.contains(-1));
    assert!(i.contains(0));
    assert!(i.contains(1));
    assert!(i.contains(2));
    assert!(!i.contains(3));
    assert!(!i.contains(4));
    assert!(!i.is_empty());
}

#[test]
fn empty_range() {
    let r1 = 0..3;
    let r2 = EmptyRange::new();
    let i = r1.intersection(r2);
    assert!(i.is_empty());
    assert_eq!(i.into_iter().collect::<Vec<_>>(), vec![]);
}

#[test]
fn bounded_set() {
    let s = (1..3).union(4..6);
    let i = (2..6).intersection(s.clone());
    assert_eq!(i.clone().into_iter().collect::<Vec<_>>(), vec![2, 4, 5]);
    assert!(!i.contains(0));
    assert!(!i.contains(1));
    assert!(i.contains(2));
    assert!(!i.contains(3));
    assert!(i.contains(4));
    assert!(i.contains(5));
    assert!(!i.contains(6));
    assert!(!i.is_empty());
    assert!((10..15).intersection(s).is_empty());
}

#[test]
fn lower_bounded_set() {
    let s = (1..2).union(3..);
    let i = (1..5).intersection(s.clone());
    assert_eq!(i.clone().into_iter().collect::<Vec<_>>(), vec![1, 3, 4]);
    assert!(!i.contains(0));
    assert!(i.contains(1));
    assert!(!i.contains(2));
    assert!(i.contains(3));
    assert!(i.contains(4));
    assert!(!i.contains(5));
    assert!(!i.contains(6));
    assert!(!i.is_empty());
    assert!((0..1).intersection(s).is_empty());
}

#[test]
fn upper_bounded_set() {
    let s = (..2).union(3..5);
    let i = (1..4).intersection(s.clone());
    assert_eq!(i.clone().into_iter().collect::<Vec<_>>(), vec![1, 3]);
    assert!(!i.contains(0));
    assert!(i.contains(1));
    assert!(!i.contains(2));
    assert!(i.contains(3));
    assert!(!i.contains(4));
    assert!(!i.contains(5));
    assert!(!i.contains(6));
    assert!(!i.is_empty());
    assert!((5..6).intersection(s).is_empty());
}

#[test]
fn unbounded_set() {
    let s = (..2).union(3..4).union(5..);
    let i = (1..6).intersection(s.clone());
    assert_eq!(i.clone().into_iter().collect::<Vec<_>>(), vec![1, 3, 5]);
    assert!(!i.contains(0));
    assert!(i.contains(1));
    assert!(!i.contains(2));
    assert!(i.contains(3));
    assert!(!i.contains(4));
    assert!(i.contains(5));
    assert!(!i.contains(6));
    assert!(!i.is_empty());
    assert!((2..3).intersection(s).is_empty());
}