utils to get cid unit test

src/utils.rs

@@ -211,8 +211,17 @@ pub fn get_container_id() -> Option<String> {
             Some(String::from_utf8_lossy(&output.stdout).to_string())
         }
         Err(er) => {
-            println!("failed( : {}", er);
             None
         }
     }
 }
+
+
+#[cfg(test)]
+mod utils_unittests {
+    use super::get_container_id;
+    #[test]
+    fn check_if_container_id_can_be_grabed() {
+        assert!(get_container_id().is_some());
+    }
+}