diff --git a/models/file.go b/models/file.go
index 19d5fc8..89984ee 100644
--- a/models/file.go
+++ b/models/file.go
@@ -61,7 +61,6 @@ func GetChildFilesOfFolders(folders *[]Folder) ([]File, error) {
 }
 
 // GetPolicy 获取文件所属策略
-// TODO:test
 func (file *File) GetPolicy() *Policy {
 	if file.Policy.Model.ID == 0 {
 		file.Policy, _ = GetPolicyByID(file.PolicyID)
@@ -91,7 +90,7 @@ func RemoveFilesWithSoftLinks(files []File) ([]File, error) {
 	var filesWithSoftLinks []File
 	tx := DB
 	for _, value := range files {
-		tx = tx.Or("source_name = ? and policy_id = ? and id != ?", value.SourceName, value.GetPolicy().ID, value.ID)
+		tx = tx.Or("source_name = ? and policy_id = ? and id != ?", value.SourceName, value.PolicyID, value.ID)
 	}
 	result := tx.Find(&filesWithSoftLinks)
 	if result.Error != nil {
@@ -99,16 +98,22 @@ func RemoveFilesWithSoftLinks(files []File) ([]File, error) {
 	}
 
 	// 过滤具有软连接的文件
+	// TODO: 优化复杂度
 	if len(filesWithSoftLinks) == 0 {
 		filteredFiles = files
 	} else {
 		for i := 0; i < len(files); i++ {
+			finder := false
 			for _, value := range filesWithSoftLinks {
-				if value.PolicyID != files[i].PolicyID || value.SourceName != files[i].SourceName {
-					filteredFiles = append(filteredFiles, files[i])
+				if value.PolicyID == files[i].PolicyID && value.SourceName == files[i].SourceName {
+					finder = true
 					break
 				}
 			}
+			if !finder {
+				filteredFiles = append(filteredFiles, files[i])
+			}
+
 		}
 	}
 
diff --git a/models/file_test.go b/models/file_test.go
index 2c1be0b..952fbc4 100644
--- a/models/file_test.go
+++ b/models/file_test.go
@@ -66,3 +66,227 @@ func TestFolder_GetChildFile(t *testing.T) {
 	asserts.NoError(mock.ExpectationsWereMet())
 
 }
+
+func TestGetChildFilesOfFolders(t *testing.T) {
+	asserts := assert.New(t)
+	testFolder := []Folder{
+		Folder{
+			Model: gorm.Model{ID: 3},
+		},
+		Folder{
+			Model: gorm.Model{ID: 4},
+		}, Folder{
+			Model: gorm.Model{ID: 5},
+		},
+	}
+
+	// 出错
+	{
+		mock.ExpectQuery("SELECT(.+)folder_id").WithArgs(3, 4, 5).WillReturnError(errors.New("not found"))
+		files, err := GetChildFilesOfFolders(&testFolder)
+		asserts.Error(err)
+		asserts.Len(files, 0)
+		asserts.NoError(mock.ExpectationsWereMet())
+	}
+
+	// 找到2个
+	{
+		mock.ExpectQuery("SELECT(.+)folder_id").
+			WithArgs(3, 4, 5).
+			WillReturnRows(sqlmock.NewRows([]string{"id", "name"}).
+				AddRow(3, "3").
+				AddRow(4, "4"),
+			)
+		files, err := GetChildFilesOfFolders(&testFolder)
+		asserts.NoError(err)
+		asserts.Len(files, 2)
+		asserts.NoError(mock.ExpectationsWereMet())
+	}
+
+	// 全部找到
+	{
+		mock.ExpectQuery("SELECT(.+)folder_id").
+			WithArgs(3, 4, 5).
+			WillReturnRows(sqlmock.NewRows([]string{"id", "name"}).
+				AddRow(3, "3").
+				AddRow(4, "4").
+				AddRow(5, "5"),
+			)
+		files, err := GetChildFilesOfFolders(&testFolder)
+		asserts.NoError(err)
+		asserts.Len(files, 3)
+		asserts.NoError(mock.ExpectationsWereMet())
+	}
+}
+
+func TestFile_GetPolicy(t *testing.T) {
+	asserts := assert.New(t)
+
+	// 空策略
+	{
+		file := File{
+			PolicyID: 23,
+		}
+		mock.ExpectQuery("SELECT(.+)policies(.+)").
+			WillReturnRows(
+				sqlmock.NewRows([]string{"id", "name"}).
+					AddRow(23, "name"),
+			)
+		file.GetPolicy()
+		asserts.NoError(mock.ExpectationsWereMet())
+		asserts.Equal(uint(23), file.Policy.ID)
+	}
+
+	// 非空策略
+	{
+		file := File{
+			PolicyID: 23,
+			Policy:   Policy{Model: gorm.Model{ID: 24}},
+		}
+		file.GetPolicy()
+		asserts.NoError(mock.ExpectationsWereMet())
+		asserts.Equal(uint(24), file.Policy.ID)
+	}
+}
+
+func TestGetFileByPaths(t *testing.T) {
+	asserts := assert.New(t)
+	paths := []string{"/我的目录/文件.txt", "/根目录文件.txt"}
+
+	// 正常情况
+	{
+		mock.ExpectQuery("SELECT(.+)files(.+)").
+			WithArgs("/我的目录", "文件.txt", 1, "/", "根目录文件.txt", 1).
+			WillReturnRows(
+				sqlmock.NewRows([]string{"id", "name"}).
+					AddRow(1, "文件.txt").
+					AddRow(2, "根目录文件.txt"),
+			)
+		files, err := GetFileByPaths(paths, 1)
+		asserts.NoError(mock.ExpectationsWereMet())
+		asserts.NoError(err)
+		asserts.Equal([]File{
+			File{
+				Model: gorm.Model{ID: 1},
+				Name:  "文件.txt",
+			},
+			File{
+				Model: gorm.Model{ID: 2},
+				Name:  "根目录文件.txt",
+			},
+		}, files)
+	}
+
+	// 出错
+	{
+		mock.ExpectQuery("SELECT(.+)files(.+)").
+			WithArgs("/我的目录", "文件.txt", 1, "/", "根目录文件.txt", 1).
+			WillReturnError(errors.New("error"))
+		files, err := GetFileByPaths(paths, 1)
+		asserts.NoError(mock.ExpectationsWereMet())
+		asserts.Error(err)
+		asserts.Len(files, 0)
+	}
+}
+
+func TestRemoveFilesWithSoftLinks(t *testing.T) {
+	asserts := assert.New(t)
+	files := []File{
+		File{
+			Model:      gorm.Model{ID: 1},
+			SourceName: "1.txt",
+			PolicyID:   23,
+		},
+		File{
+			Model:      gorm.Model{ID: 2},
+			SourceName: "2.txt",
+			PolicyID:   24,
+		},
+	}
+
+	// 全都没有
+	{
+		mock.ExpectQuery("SELECT(.+)files(.+)").
+			WithArgs("1.txt", 23, 1, "2.txt", 24, 2).
+			WillReturnRows(sqlmock.NewRows([]string{"id", "policy_id", "source_name"}))
+		file, err := RemoveFilesWithSoftLinks(files)
+		asserts.NoError(mock.ExpectationsWereMet())
+		asserts.NoError(err)
+		asserts.Equal(files, file)
+	}
+	// 查询出错
+	{
+		mock.ExpectQuery("SELECT(.+)files(.+)").
+			WithArgs("1.txt", 23, 1, "2.txt", 24, 2).
+			WillReturnError(errors.New("error"))
+		file, err := RemoveFilesWithSoftLinks(files)
+		asserts.NoError(mock.ExpectationsWereMet())
+		asserts.Error(err)
+		asserts.Nil(file)
+	}
+	// 第二个是软链
+	{
+		mock.ExpectQuery("SELECT(.+)files(.+)").
+			WithArgs("1.txt", 23, 1, "2.txt", 24, 2).
+			WillReturnRows(
+				sqlmock.NewRows([]string{"id", "policy_id", "source_name"}).
+					AddRow(3, 24, "2.txt"),
+			)
+		file, err := RemoveFilesWithSoftLinks(files)
+		asserts.NoError(mock.ExpectationsWereMet())
+		asserts.NoError(err)
+		asserts.Equal(files[:1], file)
+	}
+	// 第一个是软链
+	{
+		mock.ExpectQuery("SELECT(.+)files(.+)").
+			WithArgs("1.txt", 23, 1, "2.txt", 24, 2).
+			WillReturnRows(
+				sqlmock.NewRows([]string{"id", "policy_id", "source_name"}).
+					AddRow(3, 23, "1.txt"),
+			)
+		file, err := RemoveFilesWithSoftLinks(files)
+		asserts.NoError(mock.ExpectationsWereMet())
+		asserts.NoError(err)
+		asserts.Equal(files[1:], file)
+	}
+	// 全部是软链
+	{
+		mock.ExpectQuery("SELECT(.+)files(.+)").
+			WithArgs("1.txt", 23, 1, "2.txt", 24, 2).
+			WillReturnRows(
+				sqlmock.NewRows([]string{"id", "policy_id", "source_name"}).
+					AddRow(3, 24, "2.txt").
+					AddRow(4, 23, "1.txt"),
+			)
+		file, err := RemoveFilesWithSoftLinks(files)
+		asserts.NoError(mock.ExpectationsWereMet())
+		asserts.NoError(err)
+		asserts.Len(file, 0)
+	}
+}
+
+func TestDeleteFileByIDs(t *testing.T) {
+	asserts := assert.New(t)
+
+	// 出错
+	{
+		mock.ExpectBegin()
+		mock.ExpectExec("UPDATE(.+)delete(.+)").
+			WillReturnError(errors.New("error"))
+		mock.ExpectRollback()
+		err := DeleteFileByIDs([]uint{1, 2, 3})
+		asserts.NoError(mock.ExpectationsWereMet())
+		asserts.Error(err)
+	}
+	// 成功
+	{
+		mock.ExpectBegin()
+		mock.ExpectExec("UPDATE(.+)delete(.+)").
+			WillReturnResult(sqlmock.NewResult(0, 3))
+		mock.ExpectCommit()
+		err := DeleteFileByIDs([]uint{1, 2, 3})
+		asserts.NoError(mock.ExpectationsWereMet())
+		asserts.NoError(err)
+	}
+}
diff --git a/models/folder_test.go b/models/folder_test.go
index 45b1e59..a9a8485 100644
--- a/models/folder_test.go
+++ b/models/folder_test.go
@@ -3,6 +3,7 @@ package model
 import (
 	"errors"
 	"github.com/DATA-DOG/go-sqlmock"
+	"github.com/HFO4/cloudreve/pkg/util"
 	"github.com/jinzhu/gorm"
 	"github.com/stretchr/testify/assert"
 	"testing"
@@ -72,3 +73,59 @@ func TestFolder_GetChildFolder(t *testing.T) {
 	asserts.Len(files, 2)
 	asserts.NoError(mock.ExpectationsWereMet())
 }
+
+func TestGetRecursiveChildFolder(t *testing.T) {
+	asserts := assert.New(t)
+	dirs := []string{"/目录1", "/目录2"}
+
+	// 正常
+	{
+		mock.ExpectQuery("SELECT(.+)folders(.+)").
+			WithArgs(1, util.BuildRegexp(dirs, "^", "/", "|"), "/目录1", "/目录2").
+			WillReturnRows(
+				sqlmock.NewRows([]string{"id", "name"}).
+					AddRow(1, "sub1").
+					AddRow(2, "sub2").
+					AddRow(3, "sub3"),
+			)
+		subs, err := GetRecursiveChildFolder(dirs, 1)
+		asserts.NoError(mock.ExpectationsWereMet())
+		asserts.NoError(err)
+		asserts.Len(subs, 3)
+	}
+	// 出错
+	{
+		mock.ExpectQuery("SELECT(.+)folders(.+)").
+			WithArgs(1, util.BuildRegexp(dirs, "^", "/", "|"), "/目录1", "/目录2").
+			WillReturnError(errors.New("233"))
+		subs, err := GetRecursiveChildFolder(dirs, 1)
+		asserts.NoError(mock.ExpectationsWereMet())
+		asserts.Error(err)
+		asserts.Len(subs, 0)
+	}
+}
+
+func TestDeleteFolderByIDs(t *testing.T) {
+	asserts := assert.New(t)
+
+	// 出错
+	{
+		mock.ExpectBegin()
+		mock.ExpectExec("UPDATE(.+)delete(.+)").
+			WillReturnError(errors.New("error"))
+		mock.ExpectRollback()
+		err := DeleteFolderByIDs([]uint{1, 2, 3})
+		asserts.NoError(mock.ExpectationsWereMet())
+		asserts.Error(err)
+	}
+	// 成功
+	{
+		mock.ExpectBegin()
+		mock.ExpectExec("UPDATE(.+)delete(.+)").
+			WillReturnResult(sqlmock.NewResult(0, 3))
+		mock.ExpectCommit()
+		err := DeleteFolderByIDs([]uint{1, 2, 3})
+		asserts.NoError(mock.ExpectationsWereMet())
+		asserts.NoError(err)
+	}
+}
diff --git a/models/user.go b/models/user.go
index d59c132..1ed1375 100644
--- a/models/user.go
+++ b/models/user.go
@@ -57,16 +57,26 @@ type UserOption struct {
 
 // DeductionStorage 减少用户已用容量
 func (user *User) DeductionStorage(size uint64) bool {
+	if size == 0 {
+		return true
+	}
 	if size <= user.Storage {
 		user.Storage -= size
 		DB.Model(user).UpdateColumn("storage", gorm.Expr("storage - ?", size))
 		return true
 	}
+	// 如果要减少的容量超出以用容量，则设为零
+	user.Storage = 0
+	DB.Model(user).UpdateColumn("storage", 0)
+
 	return false
 }
 
 // IncreaseStorage 检查并增加用户已用容量
 func (user *User) IncreaseStorage(size uint64) bool {
+	if size == 0 {
+		return true
+	}
 	if size <= user.GetRemainingCapacity() {
 		user.Storage += size
 		DB.Model(user).UpdateColumn("storage", gorm.Expr("storage + ?", size))
diff --git a/pkg/filesystem/errors.go b/pkg/filesystem/errors.go
index dac770b..2cc3527 100644
--- a/pkg/filesystem/errors.go
+++ b/pkg/filesystem/errors.go
@@ -18,4 +18,5 @@ var (
 	ErrObjectNotExist          = serializer.NewError(404, "文件不存在", nil)
 	ErrIO                      = serializer.NewError(serializer.CodeIOFailed, "无法读取文件数据", nil)
 	ErrDBListObjects           = serializer.NewError(serializer.CodeDBError, "无法列取对象记录", nil)
+	ErrDBDeleteObjects         = serializer.NewError(serializer.CodeDBError, "无法删除对象记录", nil)
 )
diff --git a/pkg/filesystem/file.go b/pkg/filesystem/file.go
index ec850f1..b34a136 100644
--- a/pkg/filesystem/file.go
+++ b/pkg/filesystem/file.go
@@ -138,13 +138,13 @@ func (fs *FileSystem) GroupFileByPolicy(ctx context.Context, files []model.File)
 	var policyGroup = make(map[uint][]*model.File)
 
 	for key := range files {
-		if file, ok := policyGroup[files[key].GetPolicy().ID]; ok {
+		if file, ok := policyGroup[files[key].PolicyID]; ok {
 			// 如果已存在分组，直接追加
-			policyGroup[files[key].GetPolicy().ID] = append(file, &files[key])
+			policyGroup[files[key].PolicyID] = append(file, &files[key])
 		} else {
 			// 分布不存在，创建
-			policyGroup[files[key].GetPolicy().ID] = make([]*model.File, 0)
-			policyGroup[files[key].GetPolicy().ID] = append(policyGroup[files[key].GetPolicy().ID], &files[key])
+			policyGroup[files[key].PolicyID] = make([]*model.File, 0)
+			policyGroup[files[key].PolicyID] = append(policyGroup[files[key].PolicyID], &files[key])
 		}
 	}
 
diff --git a/pkg/filesystem/file_test.go b/pkg/filesystem/file_test.go
index e47bfc4..2c889ea 100644
--- a/pkg/filesystem/file_test.go
+++ b/pkg/filesystem/file_test.go
@@ -139,3 +139,112 @@ func TestFileSystem_GetDownloadContent(t *testing.T) {
 	asserts.NoError(err)
 	asserts.NoError(mock.ExpectationsWereMet())
 }
+
+func TestFileSystem_GroupFileByPolicy(t *testing.T) {
+	asserts := assert.New(t)
+	ctx := context.Background()
+	files := []model.File{
+		model.File{
+			PolicyID: 1,
+			Name:     "1_1.txt",
+		},
+		model.File{
+			PolicyID: 2,
+			Name:     "2_1.txt",
+		},
+		model.File{
+			PolicyID: 3,
+			Name:     "3_1.txt",
+		},
+		model.File{
+			PolicyID: 2,
+			Name:     "2_2.txt",
+		},
+		model.File{
+			PolicyID: 1,
+			Name:     "1_2.txt",
+		},
+	}
+	fs := FileSystem{}
+	policyGroup := fs.GroupFileByPolicy(ctx, files)
+	asserts.Equal(map[uint][]*model.File{
+		1: {&files[0], &files[4]},
+		2: {&files[1], &files[3]},
+		3: {&files[2]},
+	}, policyGroup)
+}
+
+func TestFileSystem_deleteGroupedFile(t *testing.T) {
+	asserts := assert.New(t)
+	ctx := context.Background()
+	fs := FileSystem{}
+	files := []model.File{
+		{
+			PolicyID:   1,
+			Name:       "1_1.txt",
+			SourceName: "1_1.txt",
+			Policy:     model.Policy{Model: gorm.Model{ID: 1}, Type: "local"},
+		},
+		{
+			PolicyID:   2,
+			Name:       "2_1.txt",
+			SourceName: "2_1.txt",
+			Policy:     model.Policy{Model: gorm.Model{ID: 1}, Type: "local"},
+		},
+		{
+			PolicyID:   3,
+			Name:       "3_1.txt",
+			SourceName: "3_1.txt",
+			Policy:     model.Policy{Model: gorm.Model{ID: 1}, Type: "local"},
+		},
+		{
+			PolicyID:   2,
+			Name:       "2_2.txt",
+			SourceName: "2_2.txt",
+			Policy:     model.Policy{Model: gorm.Model{ID: 1}, Type: "local"},
+		},
+		{
+			PolicyID:   1,
+			Name:       "1_2.txt",
+			SourceName: "1_2.txt",
+			Policy:     model.Policy{Model: gorm.Model{ID: 1}, Type: "local"},
+		},
+	}
+
+	// 全部失败
+	{
+		failed := fs.deleteGroupedFile(ctx, fs.GroupFileByPolicy(ctx, files))
+		asserts.Equal(map[uint][]string{
+			1: {"1_1.txt", "1_2.txt"},
+			2: {"2_1.txt", "2_2.txt"},
+			3: {"3_1.txt"},
+		}, failed)
+	}
+	// 部分失败
+	{
+		file, err := os.Create("1_1.txt")
+		asserts.NoError(err)
+		_ = file.Close()
+		failed := fs.deleteGroupedFile(ctx, fs.GroupFileByPolicy(ctx, files))
+		asserts.Equal(map[uint][]string{
+			1: {"1_2.txt"},
+			2: {"2_1.txt", "2_2.txt"},
+			3: {"3_1.txt"},
+		}, failed)
+	}
+	// 部分失败,包含整组未知存储策略导致的失败
+	{
+		file, err := os.Create("1_1.txt")
+		asserts.NoError(err)
+		_ = file.Close()
+
+		files[1].Policy.Type = "unknown"
+		files[3].Policy.Type = "unknown"
+		failed := fs.deleteGroupedFile(ctx, fs.GroupFileByPolicy(ctx, files))
+		asserts.Equal(map[uint][]string{
+			1: {"1_2.txt"},
+			2: {"2_1.txt", "2_2.txt"},
+			3: {"3_1.txt"},
+		}, failed)
+	}
+}
diff --git a/pkg/filesystem/path.go b/pkg/filesystem/path.go
index 0e10f8e..04f8c52 100644
--- a/pkg/filesystem/path.go
+++ b/pkg/filesystem/path.go
@@ -67,8 +67,8 @@ func (fs *FileSystem) Delete(ctx context.Context, dirs, files []string) error {
 				// TODO 删除失败时不删除文件记录及父目录
 			} else {
 				deletedFileIDs = append(deletedFileIDs, fs.FileTarget[i].ID)
-				deletedStorage[fs.FileTarget[i].ID] = fs.FileTarget[i].Size
 			}
+			deletedStorage[fs.FileTarget[i].ID] = fs.FileTarget[i].Size
 			allFileIDs = append(allFileIDs, fs.FileTarget[i].ID)
 		}
 	}
@@ -76,7 +76,7 @@ func (fs *FileSystem) Delete(ctx context.Context, dirs, files []string) error {
 	// 删除文件记录
 	err := model.DeleteFileByIDs(allFileIDs)
 	if err != nil {
-		return ErrDBListObjects.WithError(err)
+		return ErrDBDeleteObjects.WithError(err)
 	}
 
 	// 归还容量
@@ -84,7 +84,7 @@ func (fs *FileSystem) Delete(ctx context.Context, dirs, files []string) error {
 	for _, value := range deletedStorage {
 		total += value
 	}
-	fs.User.IncreaseStorage(total)
+	fs.User.DeductionStorage(total)
 
 	// 删除目录
 	var allFolderIDs = make([]uint, 0, len(fs.DirTarget))
@@ -93,7 +93,7 @@ func (fs *FileSystem) Delete(ctx context.Context, dirs, files []string) error {
 	}
 	err = model.DeleteFolderByIDs(allFolderIDs)
 	if err != nil {
-		return ErrDBListObjects.WithError(err)
+		return ErrDBDeleteObjects.WithError(err)
 	}
 
 	if notDeleted := len(fs.FileTarget) - len(deletedFileIDs); notDeleted > 0 {
diff --git a/pkg/filesystem/path_test.go b/pkg/filesystem/path_test.go
index 44cd1ee..b7b1bcd 100644
--- a/pkg/filesystem/path_test.go
+++ b/pkg/filesystem/path_test.go
@@ -2,10 +2,13 @@ package filesystem
 
 import (
 	"context"
+	"errors"
 	"github.com/DATA-DOG/go-sqlmock"
 	model "github.com/HFO4/cloudreve/models"
+	"github.com/HFO4/cloudreve/pkg/serializer"
 	"github.com/jinzhu/gorm"
 	"github.com/stretchr/testify/assert"
+	"os"
 	"testing"
 )
 
@@ -170,3 +173,192 @@ func TestFileSystem_CreateDirectory(t *testing.T) {
 	asserts.NoError(err)
 	asserts.NoError(mock.ExpectationsWereMet())
 }
+
+func TestFileSystem_ListDeleteFiles(t *testing.T) {
+	asserts := assert.New(t)
+	fs := &FileSystem{User: &model.User{
+		Model: gorm.Model{
+			ID: 1,
+		},
+	}}
+
+	// 成功
+	{
+		mock.ExpectQuery("SELECT(.+)").WillReturnRows(sqlmock.NewRows([]string{"id", "name"}).AddRow(1, "1.txt").AddRow(2, "2.txt"))
+		err := fs.ListDeleteFiles(context.Background(), []string{"/"})
+		asserts.NoError(err)
+		asserts.NoError(mock.ExpectationsWereMet())
+	}
+
+	// 失败
+	{
+		mock.ExpectQuery("SELECT(.+)").WillReturnError(errors.New("error"))
+		err := fs.ListDeleteFiles(context.Background(), []string{"/"})
+		asserts.Error(err)
+		asserts.Equal(serializer.CodeDBError, err.(serializer.AppError).Code)
+		asserts.NoError(mock.ExpectationsWereMet())
+	}
+}
+
+func TestFileSystem_ListDeleteDirs(t *testing.T) {
+	asserts := assert.New(t)
+	fs := &FileSystem{User: &model.User{
+		Model: gorm.Model{
+			ID: 1,
+		},
+	}}
+
+	// 成功
+	{
+		mock.ExpectQuery("SELECT(.+)").
+			WillReturnRows(
+				sqlmock.NewRows([]string{"id"}).
+					AddRow(1).
+					AddRow(2).
+					AddRow(3),
+			)
+		mock.ExpectQuery("SELECT(.+)").
+			WithArgs(1, 2, 3).
+			WillReturnRows(
+				sqlmock.NewRows([]string{"id", "name"}).
+					AddRow(4, "1.txt").
+					AddRow(5, "2.txt").
+					AddRow(6, "3.txt"),
+			)
+		err := fs.ListDeleteDirs(context.Background(), []string{"/"})
+		asserts.NoError(err)
+		asserts.Len(fs.FileTarget, 3)
+		asserts.Len(fs.DirTarget, 3)
+		asserts.NoError(mock.ExpectationsWereMet())
+	}
+
+	// 检索文件发生错误
+	{
+		mock.ExpectQuery("SELECT(.+)").
+			WillReturnRows(
+				sqlmock.NewRows([]string{"id"}).
+					AddRow(1).
+					AddRow(2).
+					AddRow(3),
+			)
+		mock.ExpectQuery("SELECT(.+)").
+			WithArgs(1, 2, 3).
+			WillReturnError(errors.New("error"))
+		err := fs.ListDeleteDirs(context.Background(), []string{"/"})
+		asserts.Error(err)
+		asserts.Len(fs.DirTarget, 6)
+		asserts.NoError(mock.ExpectationsWereMet())
+	}
+	// 检索目录发生错误
+	{
+		mock.ExpectQuery("SELECT(.+)").
+			WillReturnError(errors.New("error"))
+		err := fs.ListDeleteDirs(context.Background(), []string{"/"})
+		asserts.Error(err)
+		asserts.NoError(mock.ExpectationsWereMet())
+	}
+}
+
+func TestFileSystem_Delete(t *testing.T) {
+	asserts := assert.New(t)
+	fs := &FileSystem{User: &model.User{
+		Model: gorm.Model{
+			ID: 1,
+		},
+		Storage: 3,
+		Group:   model.Group{MaxStorage: 3},
+	}}
+	ctx := context.Background()
+
+	// 全部未成功
+	{
+		mock.ExpectQuery("SELECT(.+)").
+			WillReturnRows(
+				sqlmock.NewRows([]string{"id"}).
+					AddRow(1).
+					AddRow(2).
+					AddRow(3),
+			)
+		mock.ExpectQuery("SELECT(.+)").
+			WithArgs(1, 2, 3).
+			WillReturnRows(
+				sqlmock.NewRows([]string{"id", "name", "source_name", "policy_id", "size"}).
+					AddRow(4, "1.txt", "1.txt", 2, 1),
+			)
+		mock.ExpectQuery("SELECT(.+)").WillReturnRows(sqlmock.NewRows([]string{"id", "name", "source_name", "policy_id", "size"}).AddRow(1, "1.txt", "1.txt", 1, 2))
+		mock.ExpectQuery("SELECT(.+)files(.+)").
+			WillReturnRows(sqlmock.NewRows([]string{"id", "policy_id", "source_name"}))
+		// 查询上传策略
+		mock.ExpectQuery("SELECT(.+)").WillReturnRows(sqlmock.NewRows([]string{"id", "type"}).AddRow(1, "local"))
+		mock.ExpectQuery("SELECT(.+)").WillReturnRows(sqlmock.NewRows([]string{"id", "type"}).AddRow(1, "local"))
+		// 删除文件记录
+		mock.ExpectBegin()
+		mock.ExpectExec("UPDATE(.+)delete(.+)").
+			WillReturnResult(sqlmock.NewResult(0, 3))
+		mock.ExpectCommit()
+		// 归还容量
+		mock.ExpectBegin()
+		mock.ExpectExec("UPDATE(.+)").
+			WillReturnResult(sqlmock.NewResult(0, 3))
+		mock.ExpectCommit()
+		// 删除目录
+		mock.ExpectBegin()
+		mock.ExpectExec("UPDATE(.+)delete(.+)").
+			WillReturnResult(sqlmock.NewResult(0, 3))
+		mock.ExpectCommit()
+
+		err := fs.Delete(ctx, []string{"/"}, []string{"2.txt"})
+		asserts.Error(err)
+		asserts.Equal(203, err.(serializer.AppError).Code)
+		asserts.Equal(uint64(0), fs.User.Storage)
+	}
+	// 全部成功
+	{
+		file, err := os.Create("1.txt")
+		file2, err := os.Create("2.txt")
+		file.Close()
+		file2.Close()
+		asserts.NoError(err)
+		mock.ExpectQuery("SELECT(.+)").
+			WillReturnRows(
+				sqlmock.NewRows([]string{"id"}).
+					AddRow(1).
+					AddRow(2).
+					AddRow(3),
+			)
+		mock.ExpectQuery("SELECT(.+)").
+			WithArgs(1, 2, 3).
+			WillReturnRows(
+				sqlmock.NewRows([]string{"id", "name", "source_name", "policy_id", "size"}).
+					AddRow(4, "1.txt", "1.txt", 2, 1),
+			)
+		mock.ExpectQuery("SELECT(.+)").WillReturnRows(sqlmock.NewRows([]string{"id", "name", "source_name", "policy_id", "size"}).AddRow(1, "2.txt", "2.txt", 1, 2))
+		mock.ExpectQuery("SELECT(.+)files(.+)").
+			WillReturnRows(sqlmock.NewRows([]string{"id", "policy_id", "source_name"}))
+		// 查询上传策略
+		mock.ExpectQuery("SELECT(.+)").WillReturnRows(sqlmock.NewRows([]string{"id", "type"}).AddRow(1, "local"))
+		mock.ExpectQuery("SELECT(.+)").WillReturnRows(sqlmock.NewRows([]string{"id", "type"}).AddRow(1, "local"))
+		// 删除文件记录
+		mock.ExpectBegin()
+		mock.ExpectExec("UPDATE(.+)delete(.+)").
+			WillReturnResult(sqlmock.NewResult(0, 3))
+		mock.ExpectCommit()
+		// 归还容量
+		mock.ExpectBegin()
+		mock.ExpectExec("UPDATE(.+)").
+			WillReturnResult(sqlmock.NewResult(0, 3))
+		mock.ExpectCommit()
+		// 删除目录
+		mock.ExpectBegin()
+		mock.ExpectExec("UPDATE(.+)delete(.+)").
+			WillReturnResult(sqlmock.NewResult(0, 3))
+		mock.ExpectCommit()
+
+		fs.FileTarget = []model.File{}
+		fs.DirTarget = []model.Folder{}
+		err = fs.Delete(ctx, []string{"/"}, []string{"2.txt"})
+		asserts.NoError(err)
+		asserts.Equal(uint64(0), fs.User.Storage)
+	}
+
+}
diff --git a/pkg/util/common_test.go b/pkg/util/common_test.go
index b279fd4..6101872 100644
--- a/pkg/util/common_test.go
+++ b/pkg/util/common_test.go
@@ -25,3 +25,40 @@ func TestRandStringRunes(t *testing.T) {
 	sameLenStr2 := RandStringRunes(32)
 	asserts.NotEqual(sameLenStr1, sameLenStr2)
 }
+
+func TestContainsUint(t *testing.T) {
+	asserts := assert.New(t)
+	asserts.True(ContainsUint([]uint{0, 2, 3, 65, 4}, 65))
+	asserts.True(ContainsUint([]uint{65}, 65))
+	asserts.False(ContainsUint([]uint{65}, 6))
+}
+
+func TestContainsString(t *testing.T) {
+	asserts := assert.New(t)
+	asserts.True(ContainsString([]string{"", "1"}, ""))
+	asserts.True(ContainsString([]string{"", "1"}, "1"))
+	asserts.False(ContainsString([]string{"", "1"}, " "))
+}
+
+func TestReplace(t *testing.T) {
+	asserts := assert.New(t)
+
+	asserts.Equal("origin", Replace(map[string]string{
+		"123": "321",
+	}, "origin"))
+
+	asserts.Equal("321origin321", Replace(map[string]string{
+		"123": "321",
+	}, "123origin123"))
+	asserts.Equal("321new321", Replace(map[string]string{
+		"123":    "321",
+		"origin": "new",
+	}, "123origin123"))
+}
+
+func TestBuildRegexp(t *testing.T) {
+	asserts := assert.New(t)
+
+	asserts.Equal("^/dir/", BuildRegexp([]string{"/dir"}, "^", "/", "|"))
+	asserts.Equal("^/dir/|^/dir/di\\*r/", BuildRegexp([]string{"/dir", "/dir/di*r"}, "^", "/", "|"))
+}