mirror of
https://github.com/notohh/rustlings.git
synced 2024-12-04 18:29:29 -05:00
36 lines
1.1 KiB
Rust
36 lines
1.1 KiB
Rust
// This function returns how much icecream there is left in the fridge.
|
|
// If it's before 22:00 (24-hour system), then 5 scoops are left. At 22:00,
|
|
// someone eats it all, so no icecream is left (value 0). Return `None` if
|
|
// `hour_of_day` is higher than 23.
|
|
fn maybe_icecream(hour_of_day: u16) -> Option<u16> {
|
|
// TODO: Complete the function body.
|
|
}
|
|
|
|
fn main() {
|
|
// You can optionally experiment here.
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn raw_value() {
|
|
// TODO: Fix this test. How do you get the value contained in the
|
|
// Option?
|
|
let icecreams = maybe_icecream(12);
|
|
|
|
assert_eq!(icecreams, 5); // Don't change this line.
|
|
}
|
|
|
|
#[test]
|
|
fn check_icecream() {
|
|
assert_eq!(maybe_icecream(0), Some(5));
|
|
assert_eq!(maybe_icecream(9), Some(5));
|
|
assert_eq!(maybe_icecream(18), Some(5));
|
|
assert_eq!(maybe_icecream(22), Some(0));
|
|
assert_eq!(maybe_icecream(23), Some(0));
|
|
assert_eq!(maybe_icecream(24), None);
|
|
assert_eq!(maybe_icecream(25), None);
|
|
}
|
|
}
|