Adding tests to test mod

src/hands.rs

@@ -8,20 +8,24 @@ pub fn handify(input: &str) -> String {
     input
 }
 
-#[test]
-fn handify_test_no_trailing_spaces() {
+#[cfg(test)]
+mod test {
+    use super::*;
+    #[test]
+    fn handify_test_no_trailing_spaces() {
         let input = "hello world";
         assert_eq!(handify(input), "👏 HELLO 👏 WORLD 👏");
-}
+    }
 
-#[test]
-fn handify_test_with_trailing_spaces() {
+    #[test]
+    fn handify_test_with_trailing_spaces() {
         let input = " hello world ";
         assert_eq!(handify(input), "👏 HELLO 👏 WORLD 👏")
-}
+    }
 
-#[test]
-fn handify_test_empty_string() {
+    #[test]
+    fn handify_test_empty_string() {
         let input = "";
         assert_eq!(handify(input), "");
+    }
 }