}

    @Test
    public void test_Read() throws Exception {
        String indexName = "test-index";
        Client client = runner.client();
        SuggestSettings settings = suggester.settings();
        int num = 10000;

        addDocument(indexName, client, num);

        ESSourceReader reader = new ESSourceReader(client, settings, indexName);
        reader.setScrollSize(1000);
        int count = 0;

     * @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);

    }

    @Test
    public void test_useExistenceSettings() {
        String indexName = "test";
        settings.set(SuggestSettings.DefaultKeys.INDEX, indexName);

        SuggestSettings newSettingsInstance = SuggestSettings.builder().build(runner.client(), id);
        newSettingsInstance.init();
        assertEquals(indexName, newSettingsInstance.getAsString(SuggestSettings.DefaultKeys.INDEX, ""));
    }

    @Test

                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()

                final String indexName;
                if (isFessIndex) {
                    final boolean exists = existsIndex(fessConfig.getIndexDocumentUpdateIndex());
                    if (!exists) {
                        indexName = generateNewIndexName(configIndex);
                        createIndex(configIndex, indexName);
                        createAlias(configIndex, indexName);
                    } else {

    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();

}
```

**Logging with Context:**
```java
if (logger.isInfoEnabled()) {
    logger.info("Creating suggest index: index={}, searchAlias={}, updateAlias={}",
                indexName, getSearchAlias(index), getUpdateAlias(index));
}
```

**Exception Handling:**
```java
try {
    converter.init();
} catch (Exception e) {

    }

    @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");