feat(options1): rewrite to remove array stuff
@@ -8,16 +8,30 @@ fn print_number(maybe_number: Option<u16>) {
println!("printing: {}", maybe_number.unwrap());
}
-fn main() {
- print_number(13);
- print_number(99);
+// 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 :(
+// TODO: Return an Option!
+fn maybe_icecream(time_of_day: u16) -> Option<u16> {
+ // We use the 24-hour system here, so 10PM is a value of 22
+ ???
+}
+
+#[cfg(test)]
+mod tests {
+ use super::*;
- let mut numbers: [Option<u16>; 5];
- for iter in 0..5 {
- let number_to_add: u16 = {
- ((iter * 1235) + 2) / (4 * 16)
- };
+ #[test]
+ fn check_icecream() {
+ assert_eq!(maybe_icecream(10), Some(5));
+ assert_eq!(maybe_icecream(23), None);
+ assert_eq!(maybe_icecream(22), None);
+ }
- numbers[iter as usize] = number_to_add;
+ #[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);
}
}
