systemHelper.addUpdateConfigListener("XXX", () -> "OK");
        assertTrue(systemHelper.updateConfiguration().contains("XXX: OK"));
    }

    public void test_isChangedClusterState() {
        systemHelper.isChangedClusterState(0);
        assertFalse(systemHelper.isChangedClusterState(0));
        assertTrue(systemHelper.isChangedClusterState(1));
        assertTrue(systemHelper.isChangedClusterState(2));

        docMap = new DocMap(value);
        assertFalse(docMap.isEmpty());

        Set<Map.Entry<String, Object>> actual = docMap.entrySet();
        assertTrue(actual.size() == keys.size());
        docMap.clear();

        assertTrue(docMap.isEmpty());
    }

#                                            Javax Validator
#                                            ---------------
constraints.AssertFalse.message = {item} must be false.
constraints.AssertTrue.message  = {item} must be true.
constraints.DecimalMax.message  = {item} must be less than ${inclusive == true ? 'or equal to ' : ''}{value}.

        dataconfigpager.setAllPageCount(999);
        assertEquals(999, dataconfigpager.getAllPageCount());
        dataconfigpager.setExistPrePage(true);
        assertTrue(dataconfigpager.isExistPrePage());
        dataconfigpager.setExistNextPage(true);
        assertTrue(dataconfigpager.isExistNextPage());
        dataconfigpager.setPageSize(0);
        assertEquals(25, dataconfigpager.getPageSize());
        dataconfigpager.setPageSize(999);

        duplicatehostpager.setAllPageCount(999);
        assertEquals(999, duplicatehostpager.getAllPageCount());
        duplicatehostpager.setExistPrePage(true);
        assertTrue(duplicatehostpager.isExistPrePage());
        duplicatehostpager.setExistNextPage(true);
        assertTrue(duplicatehostpager.isExistNextPage());
        duplicatehostpager.setPageSize(0);
        assertEquals(25, duplicatehostpager.getPageSize());

        assertEquals("1.024EB", MemoryUtil.byteCountToDisplaySize(FileUtils.ONE_EB));
    }

    public void test_getUsedMemory() {
        assertTrue(MemoryUtil.getUsedMemory() >= 0);
    }

    public void test_sizeOf() throws Exception {
        // System.out.println("size: " + getObjectSize(""));
        assertEquals(24L, MemoryUtil.sizeOf(Integer.MAX_VALUE));

#                                            Javax Validator
#                                            ---------------
constraints.AssertFalse.message = {item} muss falsch sein.
constraints.AssertTrue.message  = {item} muss wahr sein.
constraints.DecimalMax.message  = {item} muss kleiner ${inclusive == true ? 'oder gleich ' : 'als '}{value} sein.

#                                            Javax Validator
#                                            ---------------
constraints.AssertFalse.message = {item} must be false.
constraints.AssertTrue.message  = {item} must be true.
constraints.DecimalMax.message  = {item} must be less than ${inclusive == true ? 'or equal to ' : ''}{value}.

#                                            Javax Validator
#                                            ---------------
constraints.AssertFalse.message = {item} doit être faux.
constraints.AssertTrue.message  = {item} doit être vrai.
constraints.DecimalMax.message  = {item} doit être plus petit que ${inclusive == true ? 'or equal to ' : ''}{value}.