pub fn count(n: usize, noun: &str) -> String {
if n == 1 {
format!("{} {}", n, noun)
} else {
format!("{} {}s", n, noun)
}
}
#[cfg(test)]
mod tests {
use crate::count::count;
#[test]
fn count_zero() {
assert_eq!(count(0, "cow"), "0 cows");
}
#[test]
fn count_one() {
assert_eq!(count(1, "cow"), "1 cow");
}
#[test]
fn count_two() {
assert_eq!(count(2, "cow"), "2 cows");
}
}