use match_by_hash::match_by_hash;

const fn hash(value: &str) -> usize {
    let mut result = 0;
    let bytes = value.as_bytes();
    let mut i = 0;
    while i < bytes.len() {
        result = result * 420 + (bytes[i] as usize);
        i += 1;
    }
    result
}

#[test]
fn default() {
    let result = match_by_hash!(match hash("k") {
        _ => 42,
    });
    assert_eq!(result, 42);
}

#[test]
fn keys() {
    let result = match_by_hash!(match hash("bac") {
        "a" => 1,
        "bac" => 2,
        "c" => 3,
        _ => 42,
    });
    assert_eq!(result, 2);
}

const fn num_hash(num: usize) -> usize {
    num * 3
}

#[test]
fn numbers() {
    let result = match_by_hash!(match num_hash(5usize) {
        5 => "right",
        6 => "",
        7 => "",
        _ => "",
    });
    assert_eq!(result, "right");
}