public void Create_傳入不存在的分類名稱_新增資料成功()
{
string categoryName = "BBB";
ICategoryDAO dao = Substitute.For <ICategoryDAO>();
dao.IsExist(Arg.Any <string>()).Returns(false);
var service = new CategoryService(dao);
service.Create(categoryName);
dao.Received().Create(categoryName);
}