mirror of
https://github.com/notohh/rustlings.git
synced 2024-11-22 05:52:23 -05:00
34 lines
764 B
Rust
34 lines
764 B
Rust
#[derive(PartialEq, Debug)]
|
|
struct PositiveNonzeroInteger(u64);
|
|
|
|
#[derive(PartialEq, Debug)]
|
|
enum CreationError {
|
|
Negative,
|
|
Zero,
|
|
}
|
|
|
|
impl PositiveNonzeroInteger {
|
|
fn new(value: i64) -> Result<PositiveNonzeroInteger, CreationError> {
|
|
// Hmm... Why is this always returning an Ok value?
|
|
Ok(PositiveNonzeroInteger(value as u64))
|
|
}
|
|
}
|
|
|
|
fn main() {
|
|
// You can optionally experiment here.
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn test_creation() {
|
|
assert!(PositiveNonzeroInteger::new(10).is_ok());
|
|
assert_eq!(
|
|
Err(CreationError::Negative),
|
|
PositiveNonzeroInteger::new(-10)
|
|
);
|
|
assert_eq!(Err(CreationError::Zero), PositiveNonzeroInteger::new(0));
|
|
}
|
|
}
|