}
            }
        }

        return result;
    }

    @Override
    public SuggestWriterResult delete(final Client client, final SuggestSettings settings, final String index, final String id) {
        final SuggestWriterResult result = new SuggestWriterResult();
        try {
            client.prepareDelete().setIndex(index).setId(id).execute().actionGet(settings.getIndexTimeout());

        SuggestWriterResult result = new SuggestWriterResult();

        assertNotNull(result);
        assertFalse(result.hasFailure());
        assertNotNull(result.getFailures());
        assertEquals(0, result.getFailures().size());
    }

    @Test
    public void test_addFailure() throws Exception {
        SuggestWriterResult result = new SuggestWriterResult();

        // nothing
    }

    @Override
    public SuggestWriterResult write(final Client client, final SuggestSettings settings, final String index, final SuggestItem[] items,
            final boolean update) {
        throw new UnsupportedOperationException("not yet.");
    }

    @Override
    public SuggestWriterResult delete(final Client client, final SuggestSettings settings, final String index, final String id) {

import org.codelibs.fess.suggest.index.SuggestDeleteResponse;
import org.codelibs.fess.suggest.index.writer.SuggestWriter;
import org.codelibs.fess.suggest.index.writer.SuggestWriterResult;
import org.codelibs.fess.suggest.settings.SuggestSettings;
import org.codelibs.fess.suggest.util.SuggestUtil;
import org.opensearch.action.search.SearchResponse;
import org.opensearch.index.query.BoolQueryBuilder;

import org.codelibs.fess.suggest.exception.SuggestIndexException;
import org.codelibs.fess.suggest.index.SuggestIndexResponse;
import org.codelibs.fess.suggest.index.writer.SuggestWriter;
import org.codelibs.fess.suggest.index.writer.SuggestWriterResult;
import org.codelibs.fess.suggest.settings.SuggestSettings;
import org.opensearch.transport.client.Client;

/**
 * Internal operations class for core indexing functionality.