use subject_source::vec::access;

#[test]
pub fn add_last_two_not_enough() {
    assert_eq!(access::add_last_two(&[1.0]), None);
}

#[test]
pub fn add_last_two_enough() {
    assert_eq!(access::add_last_two(&[1.0, 2.0, 3.0]), Some(5.0));
}

#[test]
pub fn dup_top_empty() {
    let mut empty = vec![];
    assert!(access::dup_top(&mut empty).is_none());
}

#[test]
pub fn dup_top_has_values() {
    let mut empty = vec![1.0, 2.0];
    assert!(access::dup_top(&mut empty).is_some());
    assert_eq!(empty, &[1.0, 2.0, 2.0]);
}

#[test]
pub fn median_already_sorted() {
    assert_eq!(access::median(&[1, 2, 3]), Some(2));
}

#[test]
pub fn median_shuffled() {
    assert_eq!(access::median(&[420, 69, 128]), Some(128));
}

#[test]
pub fn median_empty() {
    assert_eq!(access::median(&[]), None);
}