Adding tests to test mod

src/hands.rs

@@ -8,6 +8,9 @@ pub fn handify(input: &str) -> String {
     input
 }
 
+#[cfg(test)]
+mod test {
+    use super::*;
     #[test]
     fn handify_test_no_trailing_spaces() {
         let input = "hello world";
@@ -25,3 +28,4 @@ fn handify_test_empty_string() {
         let input = "";
         assert_eq!(handify(input), "");
     }
+}