### Suggester (Main Entry Point)
Location: `src/main/java/org/codelibs/fess/suggest/Suggester.java`

Main operations: `suggest()`, `popularWords()`, `indexer()`, `createIndexIfNothing()`, `createNextIndex()`, `switchIndex()`, `removeDisableIndices()`

### SuggestIndexer (Indexing Engine)
Location: `src/main/java/org/codelibs/fess/suggest/index/SuggestIndexer.java`

Handles all indexing operations, content parsing, and word management (bad words, elevate words).

import org.opensearch.action.admin.indices.get.GetIndexResponse;

/**
 * Tests for Suggester index lifecycle operations including edge cases.
 * Covers: createIndexIfNothing, createNextIndex, switchIndex, removeDisableIndices
 */
public class SuggesterIndexLifecycleTest {
    static OpenSearchRunner runner;

    @Rule
    public final TestName testName = new TestName();

    @BeforeClass

        }

        logger.info("Replacing new suggest index.");
        suggestHelper.suggester().switchIndex();

        logger.info("Removing old indices.");
        suggestHelper.suggester().removeDisableIndices();

        return exitCode.get();
    }

    private int purge(final LocalDateTime time) {
        final SuggestHelper suggestHelper = ComponentUtil.getSuggestHelper();

        try {