diff options
Diffstat (limited to 'exercises/options/options2.rs')
| -rw-r--r-- | exercises/options/options2.rs | 41 |
1 files changed, 26 insertions, 15 deletions
diff --git a/exercises/options/options2.rs b/exercises/options/options2.rs index 75b66a3..eca03f0 100644 --- a/exercises/options/options2.rs +++ b/exercises/options/options2.rs @@ -3,23 +3,34 @@ // I AM NOT DONE -fn main() { - let optional_word = Some(String::from("rustlings")); - // TODO: Make this an if let statement whose value is "Some" type - word = optional_word { - println!("The word is: {}", word); - } else { - println!("The optional word doesn't contain anything"); - } +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn simple_option() { + let target = "rustlings"; + let optional_target = Some(target); - let mut optional_integers_vec: Vec<Option<i8>> = Vec::new(); - for x in 1..10 { - optional_integers_vec.push(Some(x)); + // TODO: Make this an if let statement whose value is "Some" type + if let Some(word) = optional_target { + assert_eq!(word, target); + } } - // TODO: make this a while let statement - remember that vector.pop also adds another layer of Option<T> - // You can stack `Option<T>`'s into while let and if let - integer = optional_integers_vec.pop() { - println!("current value: {}", integer); + #[test] + fn layered_option() { + let mut range = 10; + let mut optional_integers: Vec<Option<i8>> = Vec::new(); + for i in 0..(range + 1) { + optional_integers.push(Some(i)); + } + + // TODO: make this a while let statement - remember that vector.pop also adds another layer of Option<T> + // You can stack `Option<T>`'s into while let and if let + while let Some(Some(integer)) = optional_integers.pop() { + assert_eq!(integer, range); + range -= 1; + } } } |
