From 64d95837e9813541cf5b357de13865ce687ae98d Mon Sep 17 00:00:00 2001 From: Adam Brewer Date: Mon, 16 Oct 2023 07:37:12 -0400 Subject: Update Exercises Directory Names to Reflect Order --- exercises/12_options/options1.rs | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 exercises/12_options/options1.rs (limited to 'exercises/12_options/options1.rs') diff --git a/exercises/12_options/options1.rs b/exercises/12_options/options1.rs new file mode 100644 index 0000000..e131b48 --- /dev/null +++ b/exercises/12_options/options1.rs @@ -0,0 +1,39 @@ +// 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 { + // 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); + } +} -- cgit v1.2.3