public void DefangIPaddrTest1()
        {
            //Arrange
            var swapNodesinPairs = new No1108_Defanging_an_IP_Address();
            var expected         = "1[.]1[.]1[.]1";
            //Act
            var act = swapNodesinPairs.DefangIPaddr("1.1.1.1");

            //Assert
            Assert.AreEqual(expected, act);
        }
        public void DefangIPaddrTest2()
        {
            //Arrange
            var swapNodesinPairs = new No1108_Defanging_an_IP_Address();
            var expected         = "255[.]100[.]50[.]0";
            //Act
            var act = swapNodesinPairs.DefangIPaddr("255.100.50.0");

            //Assert
            Assert.AreEqual(expected, act);
        }