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 r = (3..).to_inner();
    let u = r.union(2..4);
    assert_eq!(
        u.clone().into_iter().take(5).collect::<Vec<_>>(),
        vec![2, 3, 4, 5, 6]
    );
    assert!(!u.contains(0));
    assert!(!u.contains(1));
    assert!(u.contains(2));
    assert!(u.contains(3));
    assert!(u.contains(4));
    assert!(u.contains(5));
    assert!(u.contains(6));
    assert!(!u.is_empty());
}

#[test]
fn range_from() {
    let r = (3..).to_inner();
    let u = r.union(4..);
    assert_eq!(
        u.clone().into_iter().take(5).collect::<Vec<_>>(),
        vec![3, 4, 5, 6, 7]
    );
    assert!(!u.contains(0));
    assert!(!u.contains(1));
    assert!(!u.contains(2));
    assert!(u.contains(3));
    assert!(u.contains(4));
    assert!(u.contains(5));
    assert!(u.contains(6));
    assert!(!u.is_empty());
}

#[test]
fn range_full() {
    let r = (3..).to_inner();
    let u = r.union(..);
    assert!(u.contains(0));
    assert!(u.contains(1));
    assert!(u.contains(2));
    assert!(u.contains(3));
    assert!(u.contains(4));
    assert!(u.contains(5));
    assert!(u.contains(6));
    assert!(!u.is_empty());
}

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

#[test]
fn range_to() {
    let r = (3..).to_inner();
    let u = r.union(..2);
    assert!(u.contains(0));
    assert!(u.contains(1));
    assert!(!u.contains(2));
    assert!(u.contains(3));
    assert!(u.contains(4));
    assert!(u.contains(5));
    assert!(u.contains(6));
    assert!(!u.is_empty());

    let full = r.union(..4);
    assert!(!full.is_empty());
    assert!(full.contains(0));
    assert!(full.contains(1));
    assert!(full.contains(2));
    assert!(full.contains(3));
    assert!(full.contains(4));
    assert!(full.contains(5));
}

#[test]
fn range_to_inclusive() {
    let r = (3..).to_inner();
    let u = r.union(..=1);
    assert!(u.contains(0));
    assert!(u.contains(1));
    assert!(!u.contains(2));
    assert!(u.contains(3));
    assert!(u.contains(4));
    assert!(u.contains(5));
    assert!(u.contains(6));
    assert!(!u.is_empty());

    let full = r.union(..=4);
    assert!(!full.is_empty());
    assert!(full.contains(0));
    assert!(full.contains(1));
    assert!(full.contains(2));
    assert!(full.contains(3));
    assert!(full.contains(4));
    assert!(full.contains(5));
}

#[test]
fn bounded_range() {
    let r = (3..).to_inner();
    let r2 = (2..4).intersection(..);
    let u = r.union(r2);
    assert_eq!(
        u.clone().into_iter().take(5).collect::<Vec<_>>(),
        vec![2, 3, 4, 5, 6]
    );
    assert!(!u.contains(0));
    assert!(!u.contains(1));
    assert!(u.contains(2));
    assert!(u.contains(3));
    assert!(u.contains(4));
    assert!(u.contains(5));
    assert!(u.contains(6));
    assert!(!u.is_empty());
}

#[test]
fn lower_bounded_range() {
    let r = (3..).to_inner();
    let r2 = (4..).intersection(..);
    let u = r.union(r2);
    assert_eq!(
        u.clone().into_iter().take(5).collect::<Vec<_>>(),
        vec![3, 4, 5, 6, 7]
    );
    assert!(!u.contains(0));
    assert!(!u.contains(1));
    assert!(!u.contains(2));
    assert!(u.contains(3));
    assert!(u.contains(4));
    assert!(u.contains(5));
    assert!(u.contains(6));
    assert!(!u.is_empty());
}

#[test]
fn upper_bounded_range() {
    let r = (3..).to_inner();
    let r2 = (..2).intersection(..);
    let u = r.union(r2);
    assert!(u.contains(0));
    assert!(u.contains(1));
    assert!(!u.contains(2));
    assert!(u.contains(3));
    assert!(u.contains(4));
    assert!(u.contains(5));
    assert!(u.contains(6));
    assert!(!u.is_empty());

    let r3 = (..4).intersection(..);
    let full = r.union(r3);
    assert!(!full.is_empty());
    assert!(full.contains(0));
    assert!(full.contains(1));
    assert!(full.contains(2));
    assert!(full.contains(3));
    assert!(full.contains(4));
    assert!(full.contains(5));
}

#[test]
fn unbounded_range() {
    let r = (3..).to_inner();
    let r2 = (..).intersection(..);
    let u = r.union(r2);
    assert!(u.contains(0));
    assert!(u.contains(1));
    assert!(u.contains(2));
    assert!(u.contains(3));
    assert!(u.contains(4));
    assert!(u.contains(5));
    assert!(u.contains(6));
    assert!(!u.is_empty());
}

#[test]
fn empty_range() {
    let r = (3..).to_inner();
    let u = r.union(EmptyRange::new());
    assert_eq!(r, u);
}

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

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

#[test]
fn upper_bounded_set() {
    let r = (4..).to_inner();
    let s = (..1).union(2..3);
    let u = r.union(s);
    assert!(u.contains(0));
    assert!(!u.contains(1));
    assert!(u.contains(2));
    assert!(!u.contains(3));
    assert!(u.contains(4));
    assert!(u.contains(5));
    assert!(u.contains(6));
    assert!(!u.is_empty());

    let s = (..4).union(5..6);
    let full = r.union(s);
    assert!(!full.is_empty());
    assert!(full.contains(0));
    assert!(full.contains(1));
    assert!(full.contains(2));
    assert!(full.contains(3));
    assert!(full.contains(4));
    assert!(full.contains(5));
}

#[test]
fn unbounded_set() {
    let r = (3..).to_inner();
    let s = (..1).union(4..);
    let u = r.union(s);
    assert!(u.contains(0));
    assert!(!u.contains(1));
    assert!(!u.contains(2));
    assert!(u.contains(3));
    assert!(u.contains(4));
    assert!(u.contains(5));
    assert!(u.contains(6));
    assert!(!u.is_empty());
}