RescorerBuilder<?> result = ltrQueryRescorer.evaluate(params);
        assertNotNull(result);
        assertTrue(result instanceof QueryRescorerBuilder);

        QueryRescorerBuilder queryRescorerBuilder = (QueryRescorerBuilder) result;
        assertEquals(testWindowSize, queryRescorerBuilder.windowSize().intValue());
    }

    public void test_evaluate_withEmptyParams() {
        // Test with empty parameters map

import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.opensearch.query.StoredLtrQueryBuilder;
import org.codelibs.fess.util.ComponentUtil;
import org.opensearch.search.rescore.QueryRescorerBuilder;
import org.opensearch.search.rescore.RescorerBuilder;

/**
 * Learning to Rank query rescorer implementation.
 */
public class LtrQueryRescorer implements QueryRescorer {

    /**

    }

    /**
     * Creates a mock RescorerBuilder for testing purposes.
     * Uses QueryRescorerBuilder with a simple query.
     */
    private RescorerBuilder<?> createMockRescorerBuilder() {
        return new QueryRescorerBuilder(new MatchAllQueryBuilder());
    }