The 'world-of-zuul' game - how can I implement testing please?

Question

Hello,
I am just running through a tutorial using the 'world-of-zuul' game to get me up to speed with Java, and I am at the stage where by I need to implement automatic testing for my back command. I have created my TestGame class but I am not sure where to take my tutorial from here?
I thought of creating a new instance of my class Game in TestGame and using the goRoom() command enter a room, then use my back() command, then print out the results to see if I am in the original room.
Has anyone any experience with this small program who can help me? Thank you in advance for any advice :-)
class Game
    private Parser parser;
    private Room currentRoom,previousRoom;
    private Item roomItem;
    public static void main(String[] args) { //cannot change method (static) - String to accept arguments
        Game g; //reference variable, points to instance of game class
        g = new Game(); //new instance of the Game class
        g.play(); //using our new instance of Game call the play method to play the game       
     * Create the game and initialise its internal map.
    public Game()
        createRooms();
        parser = new Parser();
     * Create all the rooms and link their exits together.
    private void createRooms()
        Room outside, theatre, pub, lab, office;
        // create the rooms
        outside = new Room("outside the main entrance of the university");
        theatre = new Room("in a lecture theatre");
        pub = new Room("in the campus pub");
        lab = new Room("in a computing lab");
        office = new Room("in the computing admin office");
        // initialise room exits
        outside.setExit("east", theatre);
        outside.setExit("south", lab);
        outside.setExit("west", pub);
        theatre.setExit("west", outside);
        pub.setExit("east", outside);
        lab.setExit("north", outside);
        lab.setExit("east", office);
        office.setExit("west", lab);       
        // initialise room items
        outside.setItem("pole", 80);
        pub.setItem("wand", 10);
        pub.setItem("pencil", 5);
        currentRoom = outside; // start game outside
     *  Main play routine.  Loops until end of play.
    public void play()
        printWelcome();
        // Enter the main command loop.  Here we repeatedly read commands and
        // execute them until the game is over.
        boolean finished = false;
        while (! finished) {
            Command command = parser.getCommand();
            finished = processCommand(command);
        System.out.println("Thank you for playing.  Good bye.");
     * Print out the opening message for the player.
    private void printWelcome()
        System.out.println();
        System.out.println("Welcome to Adventure!");
        System.out.println("Adventure is a new, incredibly boring adventure game.");
        System.out.println("Type 'help' if you need help.");
        System.out.println();
        System.out.println(currentRoom.getLongDescription());
     * Given a command, process (that is: execute) the command.
     * If this command ends the game, true is returned, otherwise false is
     * returned.
    private boolean processCommand(Command command)
        boolean wantToQuit = false;
        if(command.isUnknown()) {
            System.out.println("I don't know what you mean...");
            return false;
        String commandWord = command.getCommandWord();
        if (commandWord.equals("help"))
            printHelp();
        else if (commandWord.equals("go"))
            goRoom(command);
        else if (commandWord.equals("back"))
            back(command);
        else if (commandWord.equals("quit")) {
            wantToQuit = quit(command);
        return wantToQuit;
    // implementations of user commands:
     * Print out some help information.
     * Here we print some stupid, cryptic message and a list of the
     * command words.
    private void printHelp()
        System.out.println("You are lost. You are alone. You wander");
        System.out.println("around at the university.");
        System.out.println();
        System.out.println("Your command words are:");
        parser.showCommands();
     * Try to go to one direction. If there is an exit, enter the new
     * room, otherwise print an error message.
    private void goRoom(Command command)
        if(!command.hasSecondWord()) {
            // if there is no second word, we don't know where to go...
            System.out.println("Go where?");
            return;
        String direction = command.getSecondWord();
        // Try to leave current room.
        Room nextRoom = currentRoom.getExit(direction);
        if (nextRoom == null)
            System.out.println("There is no door!");
        else {
            previousRoom = currentRoom; //store previous room (in order to enable back command)
            currentRoom = nextRoom;
            System.out.println(currentRoom.getLongDescription());
     * "Back" was entered. Takes the player into the last room he/she
     * has been in.
    private void back(Command command)
        if(previousRoom == null) {
            System.out.println("Sorry, cannot go back...");
            return;
        if(command.hasSecondWord()) {
            // if there is a second word, we cannot go back...
            System.out.println("I don't know what you mean...");
            return;
        currentRoom = previousRoom; //change location to the previous room
        //print method where you are
        System.out.println(currentRoom.getLongDescription());
     * "Quit" was entered. Check the rest of the command to see
     * whether we really quit the game. Return true, if this command
     * quits the game, false otherwise.
    private boolean quit(Command command)
        if(command.hasSecondWord()) {
            System.out.println("Quit what?");
            return false;
        else
            return true;  // signal that we want to quit
}

Answer 1

Anyone any ideas to help please?