* @param settings The SuggestSettings instance.
     * @param indexName The name of the index to read from.
     */
    public ESSourceReader(final Client client, final SuggestSettings settings, final String indexName) {
        this.client = client;
        this.settings = settings;
        this.indexName = indexName;
        supportedFields = settings.array().get(SuggestSettings.DefaultKeys.SUPPORTED_FIELDS);

        @Override
        public boolean existsIndex(final String indexName) {
            calledMethods.add("existsIndex");
            if (useExistingIndicesSet) {
                return existingIndices.contains(indexName);
            }
            return existsIndexResult;
        }

        @Override
        public long getDocumentCount(final String indexName) {
            calledMethods.add("getDocumentCount");

                final String settingsSource = getDefaultIndexSettings();
                final String indexName = createIndexName(index);
                if (logger.isInfoEnabled()) {
                    logger.info("Creating suggest index: index={}, searchAlias={}, updateAlias={}", indexName, getSearchAlias(index),
                            getUpdateAlias(index));
                }

                client.admin()

    public void testGetIndicesForAlias_existingAlias() throws Exception {
        final String indexName = "test-index-001";
        final String aliasName = "test-alias";

        // Create index with alias
        final CreateIndexResponse response =
                client.admin().indices().prepareCreate(indexName).addAlias(new Alias(aliasName)).execute().actionGet();

    }

    @Test
    public void test_indexFromDocumentReader() throws Exception {
        Client client = runner.client();
        int num = 1000;
        String indexName = "test";

        BulkRequestBuilder bulkRequestBuilder = client.prepareBulk();
        for (int i = 0; i < num; i++) {
            Map<String, Object> source = Collections.singletonMap("content", "test");

        ComponentUtil.register(new SystemHelper(), "systemHelper");
        ComponentUtil.register(new SearchEngineClient() {
            @Override
            public boolean existsIndex(final String indexName) {
                return false;
            }
        }, "searchEngineClient");

        String result = logNotificationJob.execute();
        assertEquals("No log notifications.", result);
    }