/// <summary>
        /// Get Customer context mock object
        /// </summary>
        /// <returns>Context object</returns>
        public CustomerEntity GetCustomerContext()
        {
            var options = new DbContextOptionsBuilder <CustomerEntity>()
                          .UseInMemoryDatabase(Guid.NewGuid().ToString())
                          .Options;
            var context = new CustomerEntity(options);

            // CustomerData => table name
            context.CustomerData.Add(new CustomerData {
                Id = 111, email = "*****@*****.**"
            });

            context.SaveChanges();
            return(context);
        }