diff --git a/src/cli.rs b/src/cli.rs
index 66d85fc..97af558 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -1,8 +1,5 @@
 use clap::{ArgGroup, Parser, Subcommand};
-use mit::commands::{
-    add::add, branch::branch, commit::commit, init::init, log::log, merge::merge, remove::remove, restore::restore,
-    status::status, switch::switch,
-};
+use mit::commands as cmd;
 
 /// Rust实现的简易版本的Git，用于学习Rust语言
 #[derive(Parser)]
@@ -127,28 +124,28 @@ pub fn handle_command() {
     let cli = Cli::parse();
     match cli.command {
         Command::Init => {
-            init().expect("初始化失败");
+            cmd::init().expect("初始化失败");
         }
         Command::Add { files, all, update } => {
-            add(files, all, update);
+            cmd::add(files, all, update);
         }
         Command::Rm { files, cached, recursive } => {
-            remove(files, cached, recursive).expect("删除失败");
+            cmd::rm(files, cached, recursive).expect("删除失败");
         }
         Command::Commit { message, allow_empty } => {
-            commit(message, allow_empty);
+            cmd::commit(message, allow_empty);
         }
         Command::Status => {
-            status();
+            cmd::status();
         }
         Command::Log { all, number } => {
-            log(all, number);
+            cmd::log(all, number);
         }
         Command::Branch { list, delete, new_branch, commit_hash, show_current } => {
-            branch(new_branch, commit_hash, list, delete, show_current);
+            cmd::branch(new_branch, commit_hash, list, delete, show_current);
         }
         Command::Switch { branch, create, detach } => {
-            switch(branch, create, detach);
+            cmd::switch(branch, create, detach);
         }
         Command::Restore { path, source, mut worktree, staged } => {
             // 未指定stage和worktree时，默认操作worktree
@@ -161,10 +158,10 @@ pub fn handle_command() {
                 If `--source` not specified, the contents are restored from `HEAD` if `--staged` is given,
                 otherwise from the [index].
             */
-            restore(path, source, worktree, staged);
+            cmd::restore(path, source, worktree, staged);
         }
         Command::Merge { branch } => {
-            merge(branch);
+            cmd::merge(branch);
         }
     }
 }
diff --git a/src/commands/add.rs b/src/commands/add.rs
index e788ade..8ab1092 100644
--- a/src/commands/add.rs
+++ b/src/commands/add.rs
@@ -3,10 +3,8 @@ use std::path::{Path, PathBuf};
 use colored::Colorize;
 
 use crate::commands::status;
-use crate::models::{
-    blob::Blob,
-    index::{FileMetaData, Index},
-};
+use crate::models::index::FileMetaData;
+use crate::models::*;
 use crate::utils::util;
 
 /// add是对index的操作，不会对工作区产生影响
diff --git a/src/commands/branch.rs b/src/commands/branch.rs
index 867a103..5643228 100644
--- a/src/commands/branch.rs
+++ b/src/commands/branch.rs
@@ -1,11 +1,6 @@
 use colored::Colorize;
 
-use crate::{
-    head,
-    models::{commit::Commit, object::Hash},
-    store,
-    utils::util,
-};
+use crate::{head, models::*, store, utils::util};
 
 // branch error
 enum BranchErr {
@@ -38,8 +33,8 @@ fn create_branch(branch_name: String, _base_commit: Hash) -> Result<(), BranchEr
 
     let base_commit = Commit::load(&base_commit.unwrap());
 
-    let exist_branchs = head::list_local_branches();
-    if exist_branchs.contains(&branch_name) {
+    let exist_branches = head::list_local_branches();
+    if exist_branches.contains(&branch_name) {
         println!("fatal: 分支 '{}' 已存在", branch_name);
         return Err(BranchErr::BranchExist);
     }
diff --git a/src/commands/commit.rs b/src/commands/commit.rs
index c17d6c2..e3a6151 100644
--- a/src/commands/commit.rs
+++ b/src/commands/commit.rs
@@ -1,12 +1,9 @@
-use crate::{
-    head,
-    models::{commit, index},
-};
+use crate::{head, models::*};
 
 use super::status;
 
 pub fn commit(message: String, allow_empty: bool) {
-    let index = index::Index::new();
+    let index = Index::new();
     if !allow_empty && status::changes_to_be_committed().is_empty() {
         panic!("工作区没有任何改动，不需要提交");
     }
@@ -16,9 +13,9 @@ pub fn commit(message: String, allow_empty: bool) {
 
     let mut commit = {
         if current_commit_hash.is_empty() {
-            commit::Commit::new(&index, vec![], message.clone())
+            Commit::new(&index, vec![], message.clone())
         } else {
-            commit::Commit::new(&index, vec![current_commit_hash.clone()], message.clone())
+            Commit::new(&index, vec![current_commit_hash.clone()], message.clone())
         }
     };
     let commit_hash = commit.save();
@@ -40,7 +37,7 @@ pub fn commit(message: String, allow_empty: bool) {
 mod test {
     use std::path::Path;
 
-    use crate::{commands, head, models, utils::util};
+    use crate::{commands as cmd, head, models, utils::util};
 
     #[test]
     #[should_panic]
@@ -58,8 +55,8 @@ mod test {
         assert!(head_one.is_empty());
 
         util::ensure_test_file(&Path::new(test_file), "test content".into());
-        commands::add::add(vec![], true, false);
-        commands::commit::commit("test commit 1".to_string(), true);
+        cmd::add(vec![], true, false);
+        cmd::commit("test commit 1".to_string(), true);
         let head_two = head::current_head_commit();
         assert!(head_two.len() > 0);
 
diff --git a/src/commands/log.rs b/src/commands/log.rs
index 4b32fc9..d0063ec 100644
--- a/src/commands/log.rs
+++ b/src/commands/log.rs
@@ -1,4 +1,4 @@
-use crate::{head, models::commit::Commit};
+use crate::{head, models::Commit};
 use colored::Colorize;
 
 const DEFAULT_LOG_NUMBER: usize = 10;
@@ -8,7 +8,7 @@ pub fn log(all: bool, number: Option<usize>) {
     let _ = __log(all, number);
 }
 
-pub fn __log(all: bool, number: Option<usize>) -> usize {
+fn __log(all: bool, number: Option<usize>) -> usize {
     let mut log_count = 0usize;
 
     let head = head::current_head();
diff --git a/src/commands/merge.rs b/src/commands/merge.rs
index 135a9d2..3192222 100644
--- a/src/commands/merge.rs
+++ b/src/commands/merge.rs
@@ -1,10 +1,7 @@
 use crate::{
-    commands::{
-        self,
-        status::{changes_to_be_committed, changes_to_be_staged},
-    },
+    commands::{self, status::*},
     head,
-    models::{commit::Commit, object::Hash},
+    models::{Commit, Hash},
     store::Store,
     utils::util,
 };
diff --git a/src/commands/mod.rs b/src/commands/mod.rs
index f5c1f45..fbb2881 100644
--- a/src/commands/mod.rs
+++ b/src/commands/mod.rs
@@ -1,10 +1,20 @@
 pub mod add;
+pub use add::add;
 pub mod branch;
+pub use branch::branch;
 pub mod commit;
+pub use commit::commit;
 pub mod init;
+pub use init::init;
 pub mod log;
+pub use log::log;
 pub mod merge;
+pub use merge::merge;
 pub mod remove;
+pub use remove::remove as rm;
 pub mod restore;
+pub use restore::restore;
 pub mod status;
+pub use status::status;
 pub mod switch;
+pub use switch::switch;
diff --git a/src/commands/remove.rs b/src/commands/remove.rs
index d3d5034..a575ead 100644
--- a/src/commands/remove.rs
+++ b/src/commands/remove.rs
@@ -1,13 +1,10 @@
-use crate::{
-    models::index::Index,
-    utils::{util, util::check_repo_exist},
-};
+use crate::{models::Index, utils::util};
 use colored::Colorize;
 use std::{fs, io, path::PathBuf};
 
 /// 从暂存区&|工作区删除文件
 pub fn remove(files: Vec<String>, cached: bool, recursive: bool) -> io::Result<()> {
-    check_repo_exist();
+    util::check_repo_exist();
     let mut index = Index::new();
     for file in files.iter() {
         let path = PathBuf::from(file);
diff --git a/src/commands/restore.rs b/src/commands/restore.rs
index 343e675..3d1ccfa 100644
--- a/src/commands/restore.rs
+++ b/src/commands/restore.rs
@@ -4,16 +4,7 @@ use std::{
     path::PathBuf,
 };
 
-use crate::{
-    head,
-    models::{
-        commit::Commit,
-        index::{FileMetaData, Index},
-        object::Hash,
-    },
-    store::Store,
-    utils::{util, util::get_working_dir},
-};
+use crate::{head, models::*, store::Store, utils::util};
 
 /// 统计[工作区]中相对于target_blobs已删除的文件（根据filters进行过滤）
 fn get_worktree_deleted_files_in_filters(
@@ -51,7 +42,7 @@ fn preprocess_filters(filters: Option<&Vec<PathBuf>>) -> Vec<PathBuf> {
     if let Some(filter) = filters {
         filter.clone()
     } else {
-        vec![get_working_dir().unwrap()] //None == all(workdir), '.' == cur_dir
+        vec![util::get_working_dir().unwrap()] //None == all(workdir), '.' == cur_dir
     }
 }
 
@@ -222,20 +213,17 @@ pub fn restore(paths: Vec<String>, source: Option<String>, worktree: bool, stage
 mod test {
     use std::fs;
     //TODO 写测试！
-    use std::path::PathBuf;
-
-    use crate::commands::add::add;
-    use crate::commands::restore::restore;
     use crate::commands::status;
-    use crate::{models::index::Index, utils::util};
+    use crate::{commands as cmd, models::Index, utils::util};
+    use std::path::PathBuf;
 
     #[test]
     fn test_restore_stage() {
         util::setup_test_with_empty_workdir();
         let path = PathBuf::from("a.txt");
         util::ensure_no_file(&path);
-        add(vec![], true, false); //add -A
-        restore(vec![".".to_string()], Some("HEAD".to_string()), false, true);
+        cmd::add(vec![], true, false); //add -A
+        cmd::restore(vec![".".to_string()], Some("HEAD".to_string()), false, true);
         let index = Index::new();
         assert!(index.get_tracked_files().is_empty());
     }
@@ -246,10 +234,10 @@ mod test {
         let files = vec!["a.txt", "b.txt", "c.txt", "test/in.txt"];
         util::ensure_test_files(&files);
 
-        add(vec![], true, false);
+        cmd::add(vec![], true, false);
         assert_eq!(status::changes_to_be_committed().new.iter().count(), 4);
 
-        restore(vec!["c.txt".to_string()], None, false, true); //restore c.txt --staged
+        cmd::restore(vec!["c.txt".to_string()], None, false, true); //restore c.txt --staged
         assert_eq!(status::changes_to_be_committed().new.iter().count(), 3);
         assert_eq!(status::changes_to_be_staged().new.iter().count(), 1);
 
@@ -257,7 +245,7 @@ mod test {
         fs::remove_dir_all("test").unwrap(); //删除test文件夹
         assert_eq!(status::changes_to_be_staged().deleted.iter().count(), 2);
 
-        restore(vec![".".to_string()], None, true, false); //restore . //from index
+        cmd::restore(vec![".".to_string()], None, true, false); //restore . //from index
         assert_eq!(status::changes_to_be_committed().new.iter().count(), 3);
         assert_eq!(status::changes_to_be_staged().new.iter().count(), 1);
         assert_eq!(status::changes_to_be_staged().deleted.iter().count(), 0);
diff --git a/src/commands/status.rs b/src/commands/status.rs
index 9be5dc3..adcfd1e 100644
--- a/src/commands/status.rs
+++ b/src/commands/status.rs
@@ -1,8 +1,8 @@
 use crate::{
     head,
     head::Head,
-    models::{commit::Commit, index::Index},
-    utils::{util, util::check_repo_exist},
+    models::{Commit, Index},
+    utils::util,
 };
 use colored::Colorize;
 use std::path::PathBuf;
@@ -137,7 +137,7 @@ pub fn changes_to_be_staged() -> Changes {
 2. staged to be committed: 暂存区与HEAD(最后一次Commit::Tree)比较，即上次的暂存区
  */
 pub fn status() {
-    check_repo_exist();
+    util::check_repo_exist();
     match head::current_head() {
         Head::Detached(commit) => {
             println!("HEAD detached at {}", commit[0..7].to_string());
@@ -197,10 +197,7 @@ pub fn status() {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::{
-        commands::{self, commit},
-        utils::util,
-    };
+    use crate::{commands as cmd, utils::util};
     use std::path::Path;
 
     #[test]
@@ -209,8 +206,8 @@ mod tests {
         let test_file = "a.txt";
         util::ensure_test_file(Path::new(test_file), None);
 
-        commit::commit("test commit".to_string(), true);
-        commands::add::add(vec![test_file.to_string()], false, false);
+        cmd::commit("test commit".to_string(), true);
+        cmd::add(vec![test_file.to_string()], false, false);
         let change = changes_to_be_committed();
         assert_eq!(change.new.len(), 1);
         assert_eq!(change.modified.len(), 0);
@@ -218,9 +215,9 @@ mod tests {
 
         println!("{:?}", change.to_absolute());
 
-        commit::commit("test commit".to_string(), true);
+        cmd::commit("test commit".to_string(), true);
         util::ensure_test_file(Path::new(test_file), Some("new content"));
-        commands::add::add(vec![test_file.to_string()], false, false);
+        cmd::add(vec![test_file.to_string()], false, false);
         let change = changes_to_be_committed();
         assert_eq!(change.new.len(), 0);
         assert_eq!(change.modified.len(), 1);
@@ -228,8 +225,8 @@ mod tests {
 
         println!("{:?}", change);
 
-        commit::commit("test commit".to_string(), true);
-        let _ = commands::remove::remove(vec![test_file.to_string()], false, false);
+        cmd::commit("test commit".to_string(), true);
+        let _ = cmd::rm(vec![test_file.to_string()], false, false);
         let change = changes_to_be_committed();
         assert_eq!(change.new.len(), 0);
         assert_eq!(change.modified.len(), 0);
diff --git a/src/commands/switch.rs b/src/commands/switch.rs
index 28961f7..aa50bc8 100644
--- a/src/commands/switch.rs
+++ b/src/commands/switch.rs
@@ -2,7 +2,7 @@ use colored::Colorize;
 
 use crate::{
     head::{self},
-    models::{commit::Commit, object::Hash},
+    models::{Commit, Hash},
     store::Store,
     utils::util,
 };
@@ -10,7 +10,7 @@ use crate::{
 use super::{
     branch,
     restore::{restore_index, restore_worktree},
-    status::{changes_to_be_committed, changes_to_be_staged},
+    status,
 };
 
 enum SwitchErr {
@@ -33,10 +33,10 @@ fn switch_to_commit(commit_hash: Hash) {
 
 fn switch_to(branch: String, detach: bool) -> Result<(), SwitchErr> {
     // 检查更改
-    if !changes_to_be_staged().is_empty() {
+    if !status::changes_to_be_staged().is_empty() {
         println!("fatal: 你有未暂存的更改，切换分支会导致更改丢失");
         return Err(SwitchErr::NoClean);
-    } else if !changes_to_be_committed().is_empty() {
+    } else if !status::changes_to_be_committed().is_empty() {
         println!("fatal: 你有未提交的更改，无法切换分支");
         return Err(SwitchErr::NoClean);
     }
@@ -85,21 +85,16 @@ pub fn switch(target_branch: Option<String>, create: Option<String>, detach: boo
 
 #[cfg(test)]
 mod test {
-    use std::{fs, path::PathBuf};
-
-    use crate::commands::{self, status};
-
     use super::*;
+    use crate::commands::{self as cmd};
+    use std::path::PathBuf;
     #[test]
     fn test_switch() {
-        util::setup_test_with_clean_mit();
-        util::list_workdir_files().iter().for_each(|f| {
-            fs::remove_file(f).unwrap();
-        });
+        util::setup_test_with_empty_workdir();
 
-        commands::commit::commit("init".to_string(), true);
+        cmd::commit("init".to_string(), true);
         let test_branch_1 = "test_branch_1".to_string();
-        commands::branch::branch(Some(test_branch_1.clone()), None, false, None, false);
+        cmd::branch(Some(test_branch_1.clone()), None, false, None, false);
 
         /* test 1: NoClean */
         let test_file_1 = PathBuf::from("test_file_1");
@@ -108,10 +103,10 @@ mod test {
         assert!(result.is_err());
         assert!(matches!(result.unwrap_err(), SwitchErr::NoClean));
 
-        commands::add::add(vec![], true, false); // add all
-        commands::commit::commit("add file 1".to_string(), true);
+        cmd::add(vec![], true, false); // add all
+        cmd::commit("add file 1".to_string(), true);
         let test_branch_2 = "test_branch_2".to_string();
-        commands::branch::branch(Some(test_branch_2.clone()), None, false, None, false); // branch2: test_file_1 exists
+        cmd::branch(Some(test_branch_2.clone()), None, false, None, false); // branch2: test_file_1 exists
 
         /* test 2: InvalidBranch */
         let result = switch_to("invalid_branch".to_string(), false);
@@ -125,14 +120,14 @@ mod test {
 
         let tees_file_2 = PathBuf::from("test_file_2");
         util::ensure_test_file(&tees_file_2, None);
-        commands::add::add(vec![], true, false); // add all
-        commands::commit::commit("add file 2".to_string(), false);
+        cmd::add(vec![], true, false); // add all
+        cmd::commit("add file 2".to_string(), false);
         let history_commit = head::current_head_commit(); // commit: test_file_1 exists, test_file_2 exists
 
         util::ensure_no_file(&test_file_1);
-        commands::add::add(vec![], true, false); // add all
+        cmd::add(vec![], true, false); // add all
         assert!(!test_file_1.exists());
-        commands::commit::commit("delete file 1".to_string(), false);
+        cmd::commit("delete file 1".to_string(), false);
         let branch_master = match head::current_head()/*  master: test_file_1 not exists, test_file_2 exists */{
             head::Head::Branch(branch) => branch,
             _ => panic!("current head is not branch"),
diff --git a/src/head.rs b/src/head.rs
index 513a070..8e7d1cd 100644
--- a/src/head.rs
+++ b/src/head.rs
@@ -1,4 +1,4 @@
-use crate::{models::object::Hash, utils::util};
+use crate::{models::Hash, utils::util};
 
 pub enum Head {
     Detached(String),
diff --git a/src/lib.rs b/src/lib.rs
index 493a380..28ecdc9 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,6 +1,6 @@
 // 不使用lib.rs的话，就无法在tests里引用到src中的模块
 pub mod commands;
-mod head;
+pub mod head;
 pub mod models;
-mod store;
+pub mod store;
 pub mod utils;
diff --git a/src/main.rs b/src/main.rs
index 1156d39..20a6322 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,6 +1,5 @@
 mod cli;
 fn main() {
     color_backtrace::install(); // colorize backtrace
-
     cli::handle_command();
 }
diff --git a/src/models/blob.rs b/src/models/blob.rs
index 2e943b6..aebcd45 100644
--- a/src/models/blob.rs
+++ b/src/models/blob.rs
@@ -1,4 +1,4 @@
-use crate::{models::object::Hash, store::Store, utils::util::calc_hash};
+use crate::{models::Hash, store::Store, utils::util};
 use std::{fs, path::Path};
 
 /**Blob<br>
@@ -14,7 +14,7 @@ impl Blob {
     /// 从源文件新建blob对象，并直接保存到/objects/中
     pub fn new(file: &Path) -> Blob {
         let data = fs::read_to_string(file).expect(format!("无法读取文件：{:?}", file).as_str());
-        let hash = calc_hash(&data);
+        let hash = util::calc_hash(&data);
         let blob = Blob { hash, data };
         blob.save();
         blob
diff --git a/src/models/commit.rs b/src/models/commit.rs
index 89323b3..2b55d32 100644
--- a/src/models/commit.rs
+++ b/src/models/commit.rs
@@ -4,7 +4,7 @@ use serde::{Deserialize, Serialize};
 
 use crate::{store, utils::util};
 
-use super::{index::Index, object::Hash, tree::Tree};
+use super::*;
 /*Commit
 * git中版本控制的单位。
 * 一份Commit中对应一份版Tree，记录了该版本所包含的文件；parent记录本次commit的来源，形成了版本树；
diff --git a/src/models/index.rs b/src/models/index.rs
index f7a2274..28f16b1 100644
--- a/src/models/index.rs
+++ b/src/models/index.rs
@@ -1,7 +1,4 @@
-use crate::{
-    models::{blob::Blob, object::Hash},
-    utils::{util, util::get_relative_path},
-};
+use crate::{models::*, utils::util};
 use serde::{Deserialize, Serialize};
 use std::{
     collections::HashMap,
@@ -171,7 +168,7 @@ impl Index {
             .entries
             .iter()
             .map(|(path, value)| {
-                let relative_path = get_relative_path(path, &self.working_dir);
+                let relative_path = util::get_relative_path(path, &self.working_dir);
                 (relative_path, value.clone())
             })
             .collect();
diff --git a/src/models/mod.rs b/src/models/mod.rs
index 5691ebb..7245fad 100644
--- a/src/models/mod.rs
+++ b/src/models/mod.rs
@@ -1,5 +1,11 @@
 pub mod blob;
+pub use blob::Blob;
 pub mod commit;
+pub use commit::Commit;
 pub mod index;
+pub use index::FileMetaData;
+pub use index::Index;
 pub mod object;
+pub use object::Hash;
 pub mod tree;
+pub use tree::Tree;
diff --git a/src/models/tree.rs b/src/models/tree.rs
index c1b8f81..2187b16 100644
--- a/src/models/tree.rs
+++ b/src/models/tree.rs
@@ -4,7 +4,7 @@ use serde::{Deserialize, Serialize};
 
 use crate::{store, utils::util};
 
-use super::{index::Index, object::Hash};
+use super::{Hash, Index};
 /*Tree
 * Tree是一个版本中所有文件的集合。从根目录还是，每个目录是一个Tree，每个文件是一个Blob。Tree之间互相嵌套表示文件的层级关系。
 * 每一个Tree对象也是对应到git储存仓库的一个文件，其内容是一个或多个TreeEntry。
@@ -157,18 +157,12 @@ impl Tree {
 mod test {
     use std::path::PathBuf;
 
-    use crate::{
-        models::{blob::Blob, index::FileMetaData},
-        utils::{
-            util,
-            util::{get_absolute_path, to_workdir_absolute_path},
-        },
-    };
+    use crate::{models::*, utils::util};
 
     #[test]
     fn test_new() {
         util::setup_test_with_clean_mit();
-        let mut index = super::Index::new();
+        let mut index = Index::new();
         for test_file in vec!["b.txt", "mit_src/a.txt", "test/test.txt"] {
             let test_file = PathBuf::from(test_file);
             util::ensure_test_file(&test_file, None);
@@ -176,7 +170,7 @@ mod test {
             index.add(test_file.clone(), FileMetaData::new(&Blob::new(&test_file), &test_file));
         }
 
-        let tree = super::Tree::new(&index);
+        let tree = Tree::new(&index);
         assert!(tree.entries.len() == 3);
         assert!(tree.hash.len() != 0);
     }
@@ -184,7 +178,7 @@ mod test {
     #[test]
     fn test_load() {
         util::setup_test_with_clean_mit();
-        let mut index = super::Index::new();
+        let mut index = Index::new();
         let test_files = vec!["b.txt", "mit_src/a.txt"];
         for test_file in test_files.clone() {
             let test_file = PathBuf::from(test_file);
@@ -192,10 +186,10 @@ mod test {
             index.add(test_file.clone(), FileMetaData::new(&Blob::new(&test_file), &test_file));
         }
 
-        let tree = super::Tree::new(&index);
+        let tree = Tree::new(&index);
         let tree_hash = tree.get_hash();
 
-        let loaded_tree = super::Tree::load(&tree_hash);
+        let loaded_tree = Tree::load(&tree_hash);
         assert!(loaded_tree.entries.len() == tree.entries.len());
         assert!(tree.entries[0].name == loaded_tree.entries[0].name);
         assert!(tree.entries[1].name == loaded_tree.entries[1].name);
@@ -204,35 +198,35 @@ mod test {
     #[test]
     fn test_get_recursive_file_entries() {
         util::setup_test_with_clean_mit();
-        let mut index = super::Index::new();
+        let mut index = Index::new();
         let mut test_files = vec![PathBuf::from("b.txt"), PathBuf::from("mit_src/a.txt")];
         for test_file in test_files.clone() {
             util::ensure_test_file(&test_file, None);
             index.add(test_file.clone(), FileMetaData::new(&Blob::new(&test_file), &test_file));
         }
 
-        let tree = super::Tree::new(&index);
+        let tree = Tree::new(&index);
         let tree_hash = tree.get_hash();
 
-        let loaded_tree = super::Tree::load(&tree_hash);
+        let loaded_tree = Tree::load(&tree_hash);
         let mut files = loaded_tree.get_recursive_file_entries();
         files.sort();
         test_files.sort();
         assert_eq!(files.len(), test_files.len());
         assert_eq!(
-            to_workdir_absolute_path(&files[0]).to_str().unwrap(), //TODO 罪大恶极的路径问题
-            get_absolute_path(&test_files[0]).to_str().unwrap()
+            util::to_workdir_absolute_path(&files[0]).to_str().unwrap(), //TODO 罪大恶极的路径问题
+            util::get_absolute_path(&test_files[0]).to_str().unwrap()
         );
         assert_eq!(
-            to_workdir_absolute_path(&files[1]).to_str().unwrap(),
-            get_absolute_path(&test_files[1]).to_str().unwrap()
+            util::to_workdir_absolute_path(&files[1]).to_str().unwrap(),
+            util::get_absolute_path(&test_files[1]).to_str().unwrap()
         );
     }
 
     #[test]
     fn test_get_recursive_blobs() {
         util::setup_test_with_clean_mit();
-        let mut index = super::Index::new();
+        let mut index = Index::new();
         let test_files = vec!["b.txt", "mit_src/a.txt"];
         let mut test_blobs = vec![];
         for test_file in test_files.clone() {
@@ -243,10 +237,10 @@ mod test {
             index.add(test_file.clone(), FileMetaData::new(&Blob::new(&test_file), &test_file));
         }
 
-        let tree = super::Tree::new(&index);
+        let tree = Tree::new(&index);
         let tree_hash = tree.get_hash();
 
-        let loaded_tree = super::Tree::load(&tree_hash);
+        let loaded_tree = Tree::load(&tree_hash);
         let blobs = loaded_tree.get_recursive_blobs();
         assert!(blobs.len() == test_files.len());
         assert!(blobs.contains(&(PathBuf::from(test_files[0]), test_blobs[0].get_hash())));
diff --git a/src/store.rs b/src/store.rs
index 5f8ee31..0fb52c5 100644
--- a/src/store.rs
+++ b/src/store.rs
@@ -1,6 +1,6 @@
 use std::path::PathBuf;
 
-use crate::models::object::Hash;
+use crate::models::Hash;
 
 use super::utils::util;