public void have_an_integer_when_second_line_is_read()
        {
            int nbrExchangeRates = ConsoleParser.ReadSecondLine("6");

            nbrExchangeRates.ShouldSatisfyAllConditions
            (
                () => nbrExchangeRates.ShouldBeOfType(typeof(Int32)),
                () => nbrExchangeRates.ShouldBeGreaterThan(0)

            );
        }
        public void return_minus_1_when_second_line_is_read_and_the_number_is_not_an_integer()
        {
            int nbrExchangeRates = ConsoleParser.ReadSecondLine("a");

            nbrExchangeRates.ShouldBe(-1);
        }