public async Task TestAddSubcategory(int subid, string subname, int cid, string sdetails, int gst)
        {
            try
            {
                SubCategoryModel subcat = new SubCategoryModel()
                {
                    Subid = subid, Subname = subname, Cid = cid, Sdetails = sdetails, Gst = gst
                };
                var res = await controller.Addsubcategory(subcat);

                Assert.AreEqual(null, res);
            }
            catch (Exception ex)
            {
                Assert.Fail(ex.InnerException.Message);
            }
        }