import org.codelibs.fess.unit.UnitFessTestCase;
import org.junit.jupiter.api.Test;

public class IndexUpdateCallbackTest extends UnitFessTestCase {

    @Test
    public void test_interface_methods() {
        // Test with anonymous implementation
        IndexUpdateCallback callback = new IndexUpdateCallback() {
            private final AtomicLong docSize = new AtomicLong(0);