test: Convert main function to working tests

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;
+        }
     }
 }