public async Task TestAddcategory(int cid, string cname, string cdetails)
        {
            try
            {
                CategoryModel cat = new CategoryModel {
                    Cid = cid, Cname = cname, Cdetails = cdetails
                };
                var mock = new Mock <IManager>();
                mock.Setup(x => x.AddCategory(cat)).ReturnsAsync(true);
                var res = await controller.Addcategory(cat);

                Assert.AreNotEqual(mock, res);
            }
            catch (Exception ex)
            {
                Assert.Fail(ex.InnerException.Message);
            }
        }