private static string WriteTheEmail()
        {
            var emailBlast = fanBoy.WriteBlast();

            WriteLine(emailBlast);
            WriteLine();
            return(emailBlast);
        }
        public void WriteEmailBlast()
        {
            var subscriber = new NumberFan();

            var result = subscriber.WriteBlast();

            result.ShouldNotBeEmpty();
        }
        public void WriteBlastBasedOnUpdate()
        {
            var subscriber = new NumberFan();
            var testNumber = 5;

            subscriber.Notify(5);

            var result = subscriber.WriteBlast();

            result.ShouldContain(testNumber.ToString());
        }