public void Should_Update_With_Error_And_Success() { JsonPatchDocument <TenantUpdateModel> patch = new JsonPatchDocument <TenantUpdateModel>(); patch.Replace(t => t.TenantEmails, "*****@*****.**"); patch.Replace(t => t.TenantName, "Hi there"); patch.Replace(t => t.TenantPhones, "464645654"); patch.Replace(t => t.ParentTenantId, Guid.NewGuid()); JsonPatchDocument <TenantUpdateModel> patch1 = new JsonPatchDocument <TenantUpdateModel>(); patch1.Replace(t => t.TenantEmails, "*****@*****.**"); patch1.Replace(t => t.TenantName, "Hi there"); patch1.Replace(t => t.TenantPhones, "464645654"); patch1.Replace(t => t.ParentTenantId, Guid.NewGuid()); ActionResult result1 = tenantsController.Update(new Guid("C5E35258-5BAD-44B5-B1BC-ED25A6C9E27A"), patch1); Assert.That(result1, Is.TypeOf <NoContentResult>()); }