@Before
 public void setUp() throws Exception {
   creator = new TestInstanceCreator();
   assertTrue(creator.setUp());
   mockServer = creator.getServer();
   mockCommandSender = creator.getCommandSender();
   // Pull a core instance from the server.
   Plugin plugin = mockServer.getPluginManager().getPlugin("Multiverse-Inventories");
   // Make sure Core is not null
   assertNotNull(plugin);
   inventories = (MultiverseInventories) plugin;
   Field field = MultiverseInventories.class.getDeclaredField("inventoriesListener");
   field.setAccessible(true);
   listener = (InventoriesListener) field.get(inventories);
   // Make sure Core is enabled
   assertTrue(inventories.isEnabled());
 }
 @After
 public void tearDown() throws Exception {
   creator.tearDown();
 }