final String virtualHost = "aaa";

        assertEquals(1, indexingHelper.deleteByVirtualHost(virtualHost));
        assertEquals("fess.update", resultMap.get("index"));
        assertEquals("virtual_host", resultMap.get("field"));
        assertEquals(virtualHost, resultMap.get("value"));
    }

    public void test_calculateDocumentSize() {
        assertEquals(0, indexingHelper.calculateDocumentSize(Collections.emptyMap()));