private ParamMap<Object, Object> createSnakeMap() {
        final Map<Object, Object> map = new HashMap<>();
        map.put("aaa", "111");
        map.put("aaa_bbb", "222");
        map.put("aaa_bbb_ccc", "333");
        map.put("ccc.ddd", "444");
        return new ParamMap<>(map);
    }

    private ParamMap<Object, Object> createCamelMap() {

        assertEquals("<123><456>", viewHelper.replaceHighlightQueries(text, queries));

        text = "123<aaa 123>456<bbb 456>123";
        queries = new String[] { "123", "456" };
        assertEquals("<strong>123</strong><aaa 123><strong>456</strong><bbb 456><strong>123</strong>",
                viewHelper.replaceHighlightQueries(text, queries));

        text = "abc";

        doc.put("key1", new String[] { "aaa", "bbb" });
        assertArrayEquals(new String[] { "aaa", "bbb" }, DocumentUtil.getValue(doc, "key1", String[].class));
        assertEquals(Arrays.asList("aaa", "bbb"), (List<String>) DocumentUtil.getValue(doc, "key1", List.class));
    }

    public void test_list() {
        Map<String, Object> doc = new HashMap<>();
        doc.put("key1", Arrays.asList("aaa", "bbb"));

        activityHelper.access(createUser("testuser", new String[0]), "/aaa", "bbb");
        assertEquals("action:ACCESS\tuser:testuser\tpath:/aaa\texecute:bbb", localLogMsg.get());

        activityHelper.access(createUser("testuser", new String[] { "111", "222" }), "/aaa/bbb", "ccc");
        assertEquals("action:ACCESS\tuser:testuser\tpath:/aaa/bbb\texecute:ccc", localLogMsg.get());
    }

    public void test_permissionChanged() {

        assertEquals("(aaa OR bbb)", getAsQuery(Collections.singletonMap(k, new String[] { "aaa bbb" })));
        assertEquals("(aaa OR bbb) ccc", getAsQuery(Collections.singletonMap(k, new String[] { "aaa bbb", "ccc" })));
        assertEquals("(aaa OR bbb) (ccc OR ddd)", getAsQuery(Collections.singletonMap(k, new String[] { "aaa bbb", "ccc ddd" })));

        value = FessFunctions.maskEmail("aaa bbb ccc");
        assertEquals("aaa bbb ccc", value);

        value = FessFunctions.maskEmail("aaa@bbb.ccc");
        assertEquals("******@****.***", value);

        value = FessFunctions.maskEmail("111.aaa@bbb.ccc");
        assertEquals("******@****.***", value);

        value = FessFunctions.maskEmail("111 aaa+@bbb.ccc 222");

        text = "\"aaafile:///home/user/\"";
        assertEquals("\"aaahttp://localhost/user/\"", pathMappingHelper.replaceUrls(text));

        text = "aaa\"file:///home/user/\"bbb";
        assertEquals("aaa\"http://localhost/user/\"bbb", pathMappingHelper.replaceUrls(text));
    }

        assertNull(stemmerOverrideItem.getNewOutput());
        assertFalse(stemmerOverrideItem.isUpdated());
        assertFalse(stemmerOverrideItem.isDeleted());

        stemmerOverrideItem.setNewInput("bbb");
        stemmerOverrideItem.setNewOutput("b");
        assertTrue(stemmerOverrideItem.isUpdated());
        assertFalse(stemmerOverrideItem.isDeleted());

        stemmerOverrideItem.setNewInput("");

    #    This is only for CSharp.
    #    e.g. Aaa.Bbb.DBFlute --> Directory: source/Aaa.Bbb.DBFlute/AllCommon
    #   o omitDirectoryPackage: (NotRequired - Default '')
    #    This is only for CSharp.
    #    e.g. Aaa --> Directory: source/Bbb/DBFlute/AllCommon
    #
    #; outputPackageAdjustmentMap = map:{
    #    ; flatDirectoryPackage = Aaa.Bbb.DBFlute
    #    ; omitDirectoryPackage = Aaa
    #}

        source.put("aaa", "");
        source.put("bbb", "");
        assertFalse(fessConfig.validateIndexRequiredFields(source));
        source.put("aaa", "");
        source.put("bbb", "a");
        assertFalse(fessConfig.validateIndexRequiredFields(source));
        source.put("aaa", " ");
        source.put("bbb", "a");
        assertFalse(fessConfig.validateIndexRequiredFields(source));
        source.put("aaa", "a");