Fizzbuzz in Rust

fizz.rs

fn three_divides(num: int) -> bool {
  num % 3 == 0
}

fn five_divides(num: int) -> bool {
  num % 5 == 0
}

fn fifteen_divides(num: int) -> bool {
  num % 15 == 0
}

fn main() {
  for num in range(1, 101) {
    println(
      if      fifteen_divides(num) { ~"FizzBuzz" }
      else if three_divides(num)   { ~"Fizz" }
      else if five_divides(num)    { ~"Buzz" }
      else    { num.to_str() }
    );
  }
}

#[test]
fn test_three_divides_three() {
  assert!(three_divides(3));
}

#[test]
fn test_five_divides_five() {
  assert!(five_divides(5));
}

#[test]
fn test_fifteen_divides_fifteen() {
  assert!(fifteen_divides(15));
}