Merge pull request #1487 from lionel-rowe/patch-1

feat(options2): better test for layered_option

exercises/options/options2.rs

@@ -18,17 +18,22 @@ mod tests {
 
     #[test]
     fn layered_option() {
-        let mut range = 10;
-        let mut optional_integers: Vec<Option<i8>> = Vec::new();
-        for i in 0..(range + 1) {
+        let range = 10;
+        let mut optional_integers: Vec<Option<i8>> = vec![None];
+
+        for i in 1..(range + 1) {
             optional_integers.push(Some(i));
         }
 
+        let mut cursor = range;
+
         // 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
+        // You can stack `Option<T>`s into while let and if let
         integer = optional_integers.pop() {
-            assert_eq!(integer, range);
-            range -= 1;
+            assert_eq!(integer, cursor);
+            cursor -= 1;
         }
+
+        assert_eq!(cursor, 0);
     }
 }