diff --git a/src/index.rs b/src/index.rs
index a6f34b0..9451f0d 100644
--- a/src/index.rs
+++ b/src/index.rs
@@ -728,6 +728,105 @@ mod tests {
         assert!(result.is_ok());
     }
 
+    const ACTIONS_COUNT: i32 = 4;
+
+    enum FileAction {
+        CREATE = 0, // create new file by new path
+        UPDATE,     // new content by existing path
+        DELETE,     // remove the file by existing path
+        MOVE,       // same content, new path
+    }
+
+    impl From<i32> for FileAction {
+        fn from(value: i32) -> Self {
+            match value {
+                0 => FileAction::CREATE,
+                1 => FileAction::UPDATE,
+                2 => FileAction::DELETE,
+                3 => FileAction::MOVE,
+                _ => unreachable!("Invalid ActionType value"),
+            }
+        }
+    }
+
+    const FILE_NAME: &str = "test_";
+    const FILE_COUNT: i32 = 3;
+    const FILE_RAND_NAME_SIZE: usize = 7;
+
+    // create randomize file name
+    fn new_rand_filename() -> String {
+        let rng = rand::thread_rng();
+        rng.sample_iter(&Alphanumeric)
+            .take(FILE_RAND_NAME_SIZE)
+            .map(char::from)
+            .collect()
+    }
+
+    fn generate_random_update(
+        root_path: PathBuf,
+        cur_name: Option<&str>,
+        new_name: Option<&str>,
+    ) -> i32 {
+        let mut rng = rand::thread_rng();
+        let rand_num: i32 = rng.gen_range(0..ACTIONS_COUNT);
+
+        let mut cur_file_path = root_path.clone();
+        if let Some(file_name) = cur_name {
+            cur_file_path.push(file_name);
+        }
+
+        let mut new_file_name = "";
+        let mut new_file_path = root_path.clone();
+        if let Some(file_name) = new_name {
+            new_file_name = file_name;
+            new_file_path.push(file_name);
+        }
+
+        match rand_num.try_into() {
+            Ok(FileAction::CREATE) => {
+                create_file_at(
+                    root_path.clone(),
+                    Some(DATA_SIZE_2),
+                    Some(&new_file_name),
+                );
+            }
+            Ok(FileAction::UPDATE) => {
+                let mut file = File::create(cur_file_path.as_path())
+                    .expect("Unable to create file");
+
+                let ten_millis = time::Duration::from_millis(10);
+                thread::sleep(ten_millis);
+
+                modify_file(&mut file);
+            }
+            Ok(FileAction::DELETE) => {
+                std::fs::remove_file(cur_file_path.clone())
+                    .expect("Should remove file successfully");
+            }
+            Ok(FileAction::MOVE) => {
+                std::fs::rename(cur_file_path, new_file_path)
+                    .expect("Should rename file successfully");
+            }
+            Err(_) => println!("rnd_num error"),
+        }
+
+        return rand_num;
+    }
+
+    fn create_temp_files_in_directory(root_path: PathBuf) {
+        for i in 0..FILE_COUNT {
+            let data_size: u64 = (i + 10).try_into().unwrap();
+            let mut create_file_name = String::from(FILE_NAME);
+            create_file_name.push_str(&i.to_string());
+
+            create_file_at(
+                root_path.clone(),
+                Some(data_size),
+                Some(&create_file_name),
+            );
+        }
+    }
+
     // resource index build
 
     #[test]
@@ -1102,105 +1201,6 @@ mod tests {
         assert!(new2 > new1);
     }
 
-    const ACTIONS_COUNT: i32 = 4;
-
-    enum FileAction {
-        CREATE = 0, // create new file by new path
-        UPDATE,     // new content by existing path
-        DELETE,     // remove the file by existing path
-        MOVE,       // same content, new path
-    }
-
-    impl From<i32> for FileAction {
-        fn from(value: i32) -> Self {
-            match value {
-                0 => FileAction::CREATE,
-                1 => FileAction::UPDATE,
-                2 => FileAction::DELETE,
-                3 => FileAction::MOVE,
-                _ => unreachable!("Invalid ActionType value"),
-            }
-        }
-    }
-
-    const FILE_NAME: &str = "test_";
-    const FILE_COUNT: i32 = 3;
-    const FILE_RAND_NAME_SIZE: usize = 7;
-
-    // create randomize file name
-    fn new_rand_filename() -> String {
-        let rng = rand::thread_rng();
-        rng.sample_iter(&Alphanumeric)
-            .take(FILE_RAND_NAME_SIZE)
-            .map(char::from)
-            .collect()
-    }
-
-    fn generate_random_update(
-        root_path: PathBuf,
-        cur_name: Option<&str>,
-        new_name: Option<&str>,
-    ) -> i32 {
-        let mut rng = rand::thread_rng();
-        let rand_num: i32 = rng.gen_range(0..ACTIONS_COUNT);
-
-        let mut cur_file_path = root_path.clone();
-        if let Some(file_name) = cur_name {
-            cur_file_path.push(file_name);
-        }
-
-        let mut new_file_name = "";
-        let mut new_file_path = root_path.clone();
-        if let Some(file_name) = new_name {
-            new_file_name = file_name;
-            new_file_path.push(file_name);
-        }
-
-        match rand_num.try_into() {
-            Ok(FileAction::CREATE) => {
-                create_file_at(
-                    root_path.clone(),
-                    Some(DATA_SIZE_2),
-                    Some(&new_file_name),
-                );
-            }
-            Ok(FileAction::UPDATE) => {
-                let mut file = File::create(cur_file_path.as_path())
-                    .expect("Unable to create file");
-
-                let ten_millis = time::Duration::from_millis(10);
-                thread::sleep(ten_millis);
-
-                modify_file(&mut file);
-            }
-            Ok(FileAction::DELETE) => {
-                std::fs::remove_file(cur_file_path.clone())
-                    .expect("Should remove file successfully");
-            }
-            Ok(FileAction::MOVE) => {
-                std::fs::rename(cur_file_path, new_file_path)
-                    .expect("Should rename file successfully");
-            }
-            Err(_) => println!("rnd_num error"),
-        }
-
-        return rand_num;
-    }
-
-    fn create_temp_files_in_directory(root_path: PathBuf) {
-        for i in 0..FILE_COUNT {
-            let data_size: u64 = (i + 10).try_into().unwrap();
-            let mut create_file_name = String::from(FILE_NAME);
-            create_file_name.push_str(&i.to_string());
-
-            create_file_at(
-                root_path.clone(),
-                Some(data_size),
-                Some(&create_file_name),
-            );
-        }
-    }
-
     #[test]
     fn update_all_compare_track_one_methods() {
         run_test_and_clean_up(|path| {