public string Perform(string[] args)
        {
            string output      = "";
            var    childToFind = args[1];
            var    node        = this._kingdom.FindChild(childToFind);

            if (node == null)
            {
                return(Message.PersonNotFound);
            }
            var operation = args[0];

            switch (operation)
            {
            case "ADD_CHILD":
                var gender    = args[3];
                var childName = args[2];
                var success   = node.AddChildren(childName, gender.Equals(Female) ? Gender.Female : Gender.Male);
                output = success ? Message.ChildAdditionSuccessful : Message.ChildAdditionFailed;
                break;

            case "GET_RELATIONSHIP":
                var handler = _relationshipHandler.GetHandler(args[2]);
                if (handler != null)
                {
                    var result = handler.Process(node);
                    output = ConvertToString(result);
                }
                break;
            }
            return(output);
        }
        public void GivenRelationshipTypeAsSiblings_ShouldReturnSiblingsHandler()
        {
            var handler = _relationshipHandler.GetHandler(Relationship.Siblings);

            Assert.NotNull(handler);
        }