public void Problem001_Tests_1()
        {
            int x   = 123;
            int act = Problem007.Reverse(x);
            int exp = 321;

            Assert.Equal(exp, act);
        }
        public void Problem001_Tests_4()
        {
            int x   = -2147483648;
            int act = Problem007.Reverse(x);
            int exp = 0;

            Assert.Equal(exp, act);
        }