36 lines
1.1 KiB
Rust
36 lines
1.1 KiB
Rust
// options1.rs
|
|
// Execute `rustlings hint options1` or use the `hint` watch subcommand for a hint.
|
|
|
|
// I AM NOT DONE
|
|
|
|
// This function returns how much icecream there is left in the fridge.
|
|
// If it's before 10PM, there's 5 pieces left. At 10PM, someone eats them
|
|
// all, so there'll be no more left :(
|
|
fn maybe_icecream(time_of_day: u16) -> Option<u16> {
|
|
// We use the 24-hour system here, so 10PM is a value of 22 and 12AM is a value of 0
|
|
// The Option output should gracefully handle cases where time_of_day > 23.
|
|
// TODO: Complete the function body - remember to return an Option!
|
|
???
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn check_icecream() {
|
|
assert_eq!(maybe_icecream(9), Some(5));
|
|
assert_eq!(maybe_icecream(10), Some(5));
|
|
assert_eq!(maybe_icecream(23), Some(0));
|
|
assert_eq!(maybe_icecream(22), Some(0));
|
|
assert_eq!(maybe_icecream(25), None);
|
|
}
|
|
|
|
#[test]
|
|
fn raw_value() {
|
|
// TODO: Fix this test. How do you get at the value contained in the Option?
|
|
let icecreams = maybe_icecream(12);
|
|
assert_eq!(icecreams, 5);
|
|
}
|
|
}
|