return 0;
            }
        };
        ComponentUtil.register(client, "searchEngineClient");

        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"));
    }