fix(friend_course): better error message (#412)

Author: 1341292919

internal/course/service/get_friend_course.go

@@ -122,7 +122,7 @@ func (s *CourseService) GetFriendCourse(req *course.GetFriendCourseRequest, logi
 		return nil, fmt.Errorf("service.GetSemesterCourses: Get courses fail: %w", err)
 	}
 	if courses == nil {
-		return nil, errno.NewErrNo(errno.InternalServiceErrorCode, "service.GetSemesterCourses: there is no course in database, please login app and retry")
+		return nil, fmt.Errorf("暂无好友课表信息，快通知好友登录App刷新课表吧")
 	}
 	list := make([]*kitexModel.Course, 0)
 	if courses.TermCourses != "" {

internal/course/service/get_friend_course_test.go

@@ -268,7 +268,7 @@ func TestGetFriendCourse(t *testing.T) {
 			termsDB:    &dbmodel.UserTerm{TermTime: pack.BuildTermOnDB([]string{"202401"})},
 			dbCourse:   (*dbmodel.UserCourse)(nil),
 			reqTerm:    "202401",
-			expectErr:  "there is no course in database",
+			expectErr:  "暂无好友课表信息，快通知好友登录App刷新课表吧",
 		},
 		{
 			name:       "db course unmarshal error",