program main
  fn random_i32() -> i32
    call std.random.i32
  fn random_is_non_negative() -> bool
    if
      binary <
        call random_i32
        int 0
      bool false
      bool true
  fn main() -> i32
    call std.io.print_bool
      call random_is_non_negative
    int 0
  test "random i32 is non-negative"
    call random_is_non_negative