public void PhoneNumberNumericTest()
 {
     //Arrange
     var visitorHost = new VisitorHost
     {
         FirstName   = "Ivan",
         LastName    = "Cedeno",
         PhoneNumber = "212867530m" // not numeric
     };
 }
 public void PhoneNumberLengthTest()
 {
     //Arrange
     var visitorHost = new VisitorHost
     {
         FirstName   = "Ivan",
         LastName    = "Cedeno",
         PhoneNumber = "212867530097826" // not of length 10
     };
 }
        public void VisitorHostTest()
        {
            //Arrange
            var visitorHost = new VisitorHost
            {
                FirstName   = "Ivan",
                LastName    = "Cedeno",
                PhoneNumber = "2128675309"
            };
            var expected = "2128675309";

            //Act
            var actual = visitorHost.PhoneNumber;

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