@Test
    public void commandExist()
    {
        assertEquals(true, commandWords.commandExists("help"));
        assertEquals(true, commandWords.commandExists("quit"));
        assertEquals(true, commandWords.commandExists("back"));
        assertEquals(true, commandWords.commandExists("manual"));
        assertEquals(true, commandWords.commandExists("inventory"));
        assertEquals(true, commandWords.commandExists("go"));
        assertEquals(true, commandWords.commandExists("use"));
        assertEquals(true, commandWords.commandExists("pickup"));
        assertEquals(true, commandWords.commandExists("drop"));
        assertEquals(true, commandWords.commandExists("new"));
        assertEquals(true, commandWords.commandExists("inspect"));
        assertEquals(true, commandWords.commandExists("load"));
        assertEquals(true, commandWords.commandExists("talk"));
        assertEquals(true, commandWords.commandExists("go"));
        assertEquals(true, commandWords.commandExists("save"));
        assertEquals(true, commandWords.commandExists("take"));
        assertEquals(true, commandWords.commandExists("fight"));
        assertEquals(false, commandWords.commandExists("An Invalid Command"));
    }