1
0
mirror of https://github.com/rust-lang/rustlings.git synced 2025-06-08 23:46:26 +02:00

37 lines
1.1 KiB
Rust
Raw Normal View History

2025-04-10 15:38:43 +07:00
// This function returns how much ice cream there is left in the fridge.
2024-06-26 12:59:10 +02:00
// If it's before 22:00 (24-hour system), then 5 scoops are left. At 22:00,
2025-04-10 15:38:43 +07:00
// someone eats it all, so no ice cream is left (value 0). Return `None` if
2024-06-26 12:59:10 +02:00
// `hour_of_day` is higher than 23.
2025-04-10 15:38:43 +07:00
fn maybe_ice_cream(hour_of_day: u16) -> Option<u16> {
2024-06-26 12:59:10 +02:00
// TODO: Complete the function body.
}
fn main() {
// You can optionally experiment here.
}
#[cfg(test)]
mod tests {
use super::*;
2020-03-05 15:52:54 -05:00
2024-06-26 12:59:10 +02:00
#[test]
fn raw_value() {
// TODO: Fix this test. How do you get the value contained in the
// Option?
2025-04-10 15:38:43 +07:00
let ice_creams = maybe_ice_cream(12);
2024-07-04 13:00:04 +02:00
2025-04-10 15:38:43 +07:00
assert_eq!(ice_creams, 5); // Don't change this line.
2024-06-26 12:59:10 +02:00
}
#[test]
2025-04-10 15:38:43 +07:00
fn check_ice_cream() {
assert_eq!(maybe_ice_cream(0), Some(5));
assert_eq!(maybe_ice_cream(9), Some(5));
assert_eq!(maybe_ice_cream(18), Some(5));
assert_eq!(maybe_ice_cream(22), Some(0));
assert_eq!(maybe_ice_cream(23), Some(0));
assert_eq!(maybe_ice_cream(24), None);
assert_eq!(maybe_ice_cream(25), None);
}
2020-03-11 13:44:10 -04:00
}