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pub mod greenback;
pub mod util;
#[derive(Copy, Clone)]
pub struct Greenback {
raw_value: i32,
}
#[cfg(test)]
mod tests {
use std::cmp::Ordering;
use Greenback;
#[test]
fn test_constructors() {
let m1 = Greenback::new(1, 23);
let m2 = Greenback::from_cents(1_23);
assert!(m1 == m2);
}
#[test]
fn test_dollars() {
assert!(Greenback::new(12, 23).dollars() == 12);
}
#[test]
fn test_cents() {
assert!(Greenback::new(12, 23).cents() == 23);
}
#[test]
fn test_add() {
let m1 = Greenback::new(0, 99);
let m2 = Greenback::new(1, 15);
let m3 = m1 + m2;
assert!(m3.dollars() == 2);
assert!(m3.cents() == 14);
}
#[test]
fn test_sub() {
let m1 = Greenback::new(1, 15);
let m2 = Greenback::new(0, 20);
let m3 = m1 - m2;
assert!(m3.dollars() == 0);
assert!(m3.cents() == 95);
}
#[test]
fn test_mul() {
let mut m = Greenback::new(1, 10);
m = m * 5;
assert!(m.dollars() == 5);
assert!(m.cents() == 50);
}
#[test]
fn test_div() {
let mut m = Greenback::new(1, 99);
m = m / 5;
assert!(m.dollars() == 0);
assert!(m.cents() == 40);
}
#[test]
fn test_add_assign() {
let mut m = Greenback::new(1, 10);
m += Greenback::new(0, 10);
assert!(m.dollars() == 1);
assert!(m.cents() == 20);
}
#[test]
fn test_sub_assign() {
let mut m = Greenback::new(1, 10);
m -= Greenback::new(0, 5);
assert!(m.dollars() == 1);
assert!(m.cents() == 5);
}
#[test]
fn test_mul_assign() {
let mut m = Greenback::new(1, 10);
m *= 5;
assert!(m.dollars() == 5);
assert!(m.cents() == 50);
}
#[test]
fn test_div_assign() {
let mut m = Greenback::new(1, 99);
m /= 5;
assert!(m.dollars() == 0);
assert!(m.cents() == 40);
}
#[test]
fn test_sum() {
let m1 = Greenback::new(0, 10);
let m2 = Greenback::new(0, 5);
let ms = vec![m1, m2];
let sum: Greenback = ms.iter().cloned().sum();
assert!(sum == m1 + m2);
}
#[test]
fn test_equality() {
let m1 = Greenback::new(1, 15);
let m2 = Greenback::new(1, 15);
let m3 = Greenback::new(1, 16);
assert!(m1 == m2);
assert!(m1 != m3);
}
#[test]
fn test_ordering() {
let large = Greenback::new(10, 50);
let same = Greenback::new(10, 50);
let small = Greenback::new(0, 25);
assert_eq!(small.partial_cmp(&large), Some(Ordering::Less));
assert_eq!(large.partial_cmp(&small), Some(Ordering::Greater));
assert_eq!(large.partial_cmp(&same), Some(Ordering::Equal));
assert!(large > small);
assert!(large >= small);
assert!(small < large);
assert!(small <= large);
assert!(large >= same);
assert!(large <= same);
let huge = Greenback::new(999, 99);
let mut items = vec![huge, small, large];
items.sort();
assert!(*items.first().unwrap() == small);
assert!(*items.last().unwrap() == huge);
}
#[test]
fn test_display() {
fn test(cents: i32, s: &str) {
let res = format!("{}", Greenback::from_cents(cents));
println!("Expected: {}", s);
println!("Got: {}", res);
assert!(res == s);
}
println!("");
test(0, "$0.00");
test(1, "$0.01");
test(11, "$0.11");
test(111, "$1.11");
test(1111, "$11.11");
test(11111, "$111.11");
test(111111, "$1,111.11");
test(1111111, "$11,111.11");
test(11111111, "$111,111.11");
test(111111111, "$1,111,111.11");
test(1111111111, "$11,111,111.11");
test(-0, "$0.00");
test(-1, "-$0.01");
test(-11, "-$0.11");
test(-111, "-$1.11");
test(-1111, "-$11.11");
test(-11111, "-$111.11");
test(-111111, "-$1,111.11");
test(-1111111, "-$11,111.11");
test(-11111111, "-$111,111.11");
test(-111111111, "-$1,111,111.11");
test(-1111111111, "-$11,111,111.11");
}
}