assertEquals("[]", Iterables.toString(list));

    list = newArrayList("yam", "bam", "jam", "ham");
    assertEquals("[yam, bam, jam, ham]", Iterables.toString(list));
  }

  public void testLimit() {
    Iterable<String> iterable = newArrayList("foo", "bar", "baz");
    Iterable<String> limited = Iterables.limit(iterable, 2);

    List<String> expected = ImmutableList.of("foo", "bar");

    assertEquals("[]", Iterables.toString(list));

    list = newArrayList("yam", "bam", "jam", "ham");
    assertEquals("[yam, bam, jam, ham]", Iterables.toString(list));
  }

  public void testLimit() {
    Iterable<String> iterable = newArrayList("foo", "bar", "baz");
    Iterable<String> limited = Iterables.limit(iterable, 2);

    List<String> expected = ImmutableList.of("foo", "bar");

    Iterator<String> iterator = Collections.<String>emptyList().iterator();
    assertEquals("[]", Iterators.toString(iterator));
  }

  @SuppressWarnings("JUnitIncompatibleType") // Fails with j2kt.
  public void testLimit() {
    List<String> list = new ArrayList<>();
    assertThrows(IllegalArgumentException.class, () -> Iterators.limit(list.iterator(), -1));

    assertFalse(Iterators.limit(list.iterator(), 0).hasNext());

    Iterator<String> iterator = Collections.<String>emptyList().iterator();
    assertEquals("[]", Iterators.toString(iterator));
  }

  @SuppressWarnings("JUnitIncompatibleType") // Fails with j2kt.
  public void testLimit() {
    List<String> list = new ArrayList<>();
    assertThrows(IllegalArgumentException.class, () -> Iterators.limit(list.iterator(), -1));

    assertFalse(Iterators.limit(list.iterator(), 0).hasNext());

    private FileTypeHelper fileTypeHelper;

    @Override
    public void setUp() throws Exception {
        super.setUp();
        fileTypeHelper = new FileTypeHelper();
    }

    public void test_init() {
        try {
            fileTypeHelper.init();
        } catch (Exception e) {
            fail("init() should not throw an exception: " + e.getMessage());
        }
    }

    public void test_add() {

    }

    private void setupMockComponents() {
        ComponentUtil.setFessConfig(new MockFessConfig());
        ComponentUtil.register(new MockSystemHelper(), "systemHelper");
    }

    public void test_init() {
        SearchLogHelper helper = new SearchLogHelper();
        helper.init();

        assertNotNull(helper.userInfoCache);
        assertNotNull(helper.searchLogLogger);
    }

        url = "http://www.bar.com:8080/";
        result = "http://www.bar.com:8080/";
        assertEquals(result, duplicateHostHelper.convert(url));
    }

    public void test_init() {
        DuplicateHostHelper helper = new DuplicateHostHelper();

        try {
            helper.init();
            assertNotNull(helper.duplicateHostList);
        } catch (Exception e) {

        ComponentUtil.register(new MockVirtualHostHelper(), "virtualHostHelper");
        ComponentUtil.register(new MockRoleQueryHelper(), "roleQueryHelper");
    }

    public void test_init() {
        try {
            labelTypeHelper.init();
        } catch (Exception e) {
            fail("init() should not throw an exception: " + e.getMessage());
        }
    }

    public void test_load() {

        assertEquals(0, SambaHelper.SID_TYPE_USE_NONE);
        assertEquals(1, SambaHelper.SID_TYPE_USER);
        assertEquals(5, SambaHelper.SID_TYPE_WKN_GRP);
    }

    public void test_init() {
        ComponentUtil.setFessConfig(new MockFessConfig());
        sambaHelper.init();
        assertNotNull(sambaHelper.fessConfig);
    }

        assertEquals("L1:aaa\nL2:bbb", documentHelper.appendLineNumber("L", "aaa\nbbb"));
        assertEquals("L1:aaa\nL2:bbb\nL3:ccc", documentHelper.appendLineNumber("L", "aaa\nbbb\nccc"));
    }

    public void test_init() {
        DocumentHelper documentHelper = new DocumentHelper();

        try {
            documentHelper.init();
        } catch (Exception e) {