Helpers.testComparator(comparator, ordered);
  }

  public void testSort() {
    testSort(new long[] {}, new long[] {});
    testSort(new long[] {2}, new long[] {2});
    testSort(new long[] {2, 1, 0}, new long[] {0, 1, 2});
    testSort(new long[] {2, GREATEST, 1, LEAST}, new long[] {LEAST, 1, 2, GREATEST});
  }

  static void testSort(long[] input, long[] expected) {
    input = Arrays.copyOf(input, input.length);

        DuplicateHostHelper helper = new DuplicateHostHelper();
        List<DuplicateHost> testList = new ArrayList<>();

        DuplicateHost testHost = new DuplicateHost();
        testHost.setRegularName("www.test.com");
        testHost.setDuplicateHostName("test.com");
        testList.add(testHost);

        helper.setDuplicateHostList(testList);

        assertEquals(testList, helper.duplicateHostList);

    public void test_constructor_withIdZero() {
        // Test constructor with id = 0 (create mode)
        ProtwordsItem item = new ProtwordsItem(0, "testword");

        assertEquals(0, item.getId());
        assertEquals("testword", item.getInput());
        assertEquals("testword", item.getNewInput());
    }

    public void test_constructor_withNonZeroId() {
        // Test constructor with id != 0 (existing item)

        // and properly closed even when errors might occur

        protwordsFile.reload(null);

        // Test normal creation and cleanup of ProtwordsUpdater
        ProtwordsItem testItem = new ProtwordsItem(0, "testWord");
        ProtwordsFile.ProtwordsUpdater updater = null;

        try {
            // Create the updater successfully
            updater = protwordsFile.new ProtwordsUpdater(testItem);

        // Set newInputs to non-empty array - not deleted
        item.setNewInputs(new String[] { "something" });
        assertFalse(item.isDeleted());
    }

    public void test_sort() {
        String[] inputs = { "z", "a", "m" };
        String[] newInputs = { "9", "1", "5" };

        CharMappingItem item = new CharMappingItem(1L, inputs, "output");
        item.setNewInputs(newInputs);