assertEquals("fess.update", resultMap.get("index"));
        assertEquals(id, resultMap.get("id"));
        assertEquals("parent_id", resultMap.get("field"));
    }

    @Test
    public void test_getChildDocumentList() {
        documentSizeByQuery = 1L;
        final Map<String, String> resultMap = new HashMap<>();
        final SearchEngineClient client = new SearchEngineClient() {
            @Override