public void IsUndefined_ReturnFalse()
        {
            var node           = new StringKeyValueNode("bob", "test");
            var observedResult = node.IsUndefined();

            Assert.False(observedResult);
        }
        public void IsUndefined_ReturnTrue()
        {
            var node           = new StringKeyValueNode("bob", null);
            var observedResult = node.IsUndefined();

            Assert.True(observedResult);
        }