From d9f72d6ad261b7b8fe97fb80423780e8361abb86 Mon Sep 17 00:00:00 2001
From: Torsten Scheck <torsten.scheck@gmx.de>
Date: Mon, 3 Jul 2017 18:07:04 +0200
Subject: [PATCH] Added exemplary unit test for iter_mut().

---
 solutions/src/list.rs | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/solutions/src/list.rs b/solutions/src/list.rs
index c7ae6ad..1c794fc 100644
--- a/solutions/src/list.rs
+++ b/solutions/src/list.rs
@@ -204,4 +204,20 @@ mod tests {
         }
         assert_eq!(count.count.get(), 20);
     }
+
+    #[test]
+    fn test_iter_mut() {
+        let mut l = LinkedList::<i32>::new();
+        for i in 0..5 {
+            l.push_back(i);
+        }
+
+        assert_eq!(l.pop_front(), Some(0));
+        assert_eq!(l.pop_back(), Some(4));
+
+        for (n, i) in l.iter_mut().enumerate() {
+            *i-=1;
+            assert_eq!(n as i32, *i);
+        }
+    }
 }
-- 
2.30.2