assertEquals(1, indexingHelper.deleteDocumentByUrl(client, url));
        assertEquals("fess.update", resultMap.get("index"));
        assertEquals(url, resultMap.get("url"));
    }

    public void test_deleteDocumentsByDocId() {
        final Map<String, Object> resultMap = new HashMap<>();
        final SearchEngineClient client = new SearchEngineClient() {
            @Override