diff --git a/.gitignore b/.gitignore
index 28b4735..d0c786e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -31,4 +31,4 @@ Cargo.lock
 .DS_Store
 
 ## for app test
-.mit
\ No newline at end of file
+mit_test_storage
\ No newline at end of file
diff --git a/src/store.rs b/src/store.rs
index f0eb4cf..ed53d59 100644
--- a/src/store.rs
+++ b/src/store.rs
@@ -12,9 +12,7 @@ impl Store {
             panic!("不是合法的mit仓库");
         }
         let store_path = util::get_storage_path().unwrap();
-        Store {
-            store_path,
-        }
+        Store { store_path }
     }
     pub fn load(&self, hash: &String) -> String {
         /* 读取文件内容 */
@@ -43,15 +41,26 @@ impl Store {
 }
 #[cfg(test)]
 mod tests {
+    use crate::commands::init;
+
     use super::*;
 
     #[test]
-    fn test_new() {
+    fn test_new_success() {
+        util::setup_test_with_mit();
+        let _ = Store::new();
+    }
+
+    #[test]
+    #[should_panic]
+    fn test_new_fail() {
+        util::setup_test_without_mit();
         let _ = Store::new();
     }
 
     #[test]
     fn test_save_and_load() {
+        let _ = util::setup_test_with_mit();
         let store = Store::new();
         let content = "hello world".to_string();
         let hash = store.save(&content);
diff --git a/src/utils/util.rs b/src/utils/util.rs
index 749bafe..6be7ea0 100644
--- a/src/utils/util.rs
+++ b/src/utils/util.rs
@@ -1,8 +1,35 @@
-use std::{fs, io};
-use std::path::{Path, PathBuf};
 use sha1::{Digest, Sha1};
+use std::path::{Path, PathBuf};
+use std::{fs, io};
 
 pub const ROOT_DIR: &str = ".mit";
+pub const TEST_DIR: &str = "mit_test_storage"; // 执行测试的储存库
+
+pub fn setup_test_dir() {
+    let path = std::env::var("CARGO_MANIFEST_DIR").unwrap();
+    let mut path = PathBuf::from(path);
+    path.push(TEST_DIR);
+    if !path.exists() {
+        fs::create_dir(&path).unwrap();
+    }
+    std::env::set_current_dir(&path).unwrap();
+}
+
+pub fn setup_test_with_mit() {
+    // 将执行目录切换到测试目录
+    setup_test_dir();
+    let _ = crate::commands::init::init();
+}
+
+pub fn setup_test_without_mit() {
+    // 将执行目录切换到测试目录，并清除测试目录下的.mit目录
+    setup_test_dir();
+    let mut path = std::env::current_dir().unwrap();
+    path.push(ROOT_DIR);
+    if path.exists() {
+        fs::remove_dir_all(&path).unwrap();
+    }
+}
 
 pub fn calc_hash(data: &String) -> String {
     let mut hasher = Sha1::new();
@@ -63,7 +90,8 @@ pub fn list_files(path: &Path) -> io::Result<Vec<PathBuf>> {
     let mut files = Vec::new();
 
     if path.is_dir() {
-        if path.file_name().unwrap_or_default() == ROOT_DIR { // 跳过 .mit 目录
+        if path.file_name().unwrap_or_default() == ROOT_DIR {
+            // 跳过 .mit 目录
             return Ok(files);
         }
         for entry in fs::read_dir(path)? {
@@ -148,4 +176,4 @@ mod tests {
             Err(err) => println!("{}", err),
         }
     }
-}
\ No newline at end of file
+}