public void DeleteMethodDeletesFilesSuccesfully(string sourcePath)
        {
            CurrentUser.user.username = "******";
            DeleteFileBindingModel bindingModel = new DeleteFileBindingModel();

            bindingModel.FileSourcePath = sourcePath;

            DeleterFileService deleteFileService = new DeleterFileService();

            string[] files = new string[] { sourcePath + "\\aaaa.pptx", sourcePath + "\\banan.docx" };


            deleteFileService.Delete(files, bindingModel);


            FileAssert.DoesNotExist(sourcePath + @"\aaaa.pptx");
            FileAssert.DoesNotExist(sourcePath + @"\banan.docx");
        }
        public void DeleteMethodFailed(string sourcePath)
        {
            CurrentUser.user.username = "******";
            DeleteFileBindingModel bindingModel = new DeleteFileBindingModel();

            bindingModel.FileSourcePath = sourcePath;

            DeleterFileService deleteFileService = new DeleterFileService();

            FieldInfo[] fields    = typeof(DeleterFileService).GetFields(BindingFlags.Instance | BindingFlags.NonPublic).ToArray();
            FieldInfo   isDeleted = fields.FirstOrDefault(x => x.Name == "isDeleted");

            isDeleted.SetValue(deleteFileService, false);

            string[] files = new string[] { sourcePath + "\\aaaa.pptx", sourcePath + "\\banan.docx" };

            deleteFileService.Delete(files, bindingModel);

            Assert.IsFalse((bool)isDeleted.GetValue(deleteFileService));
        }