### Question:
ActivityLogger { public ObservableList<ActivityItem> getActivityItems() { return FXCollections.unmodifiableObservableList(activityItems); } ActivityLogger(); void addActivityItem(final ActivityItem item); ObservableList<ActivityItem> getActivityItems(); void clearActivityItems();  }### Answer:
@Test public void testGetActivityItems() { assertNotNull(logger.getActivityItems()); }