* @return new referral, combining a chain of referrals
     */
    DfsReferralDataInternal combine(DfsReferralData next);

    /**
     * Append another referral to this referral chain
     *
     * @param dr the referral to append
     */
    void append(DfsReferralDataInternal dr);

     * @return
     * @throws SmbAuthException
     */
    private DfsReferralDataInternal resolveIntermediates(final CIFSContext tf, final String path, final int depthLimit,
            final DfsReferralDataInternal dr) throws SmbAuthException {
        DfsReferralDataInternal res = null;
        final DfsReferralDataInternal start = dr;
        DfsReferralDataInternal r = start;
        do {
            r = start.next();

        DfsReferralDataInternal mockReferral = mock(DfsReferralDataInternal.class);
        // Should not throw any exception.
        assertDoesNotThrow(() -> dfsImpl.cache(mockContext, "invalidpath", mockReferral));
    }

    @Test
    void testCache_ValidPath() {
        // Scenario: A valid referral is cached.
        DfsReferralDataInternal mockReferral = mock(DfsReferralDataInternal.class);

import org.mockito.MockitoAnnotations;

import jcifs.DfsReferralData;

/**
 * Test class for DfsReferralDataInternal interface
 * Tests the interface contract using mock implementations and concrete class
 */
@DisplayName("DfsReferralDataInternal Interface Tests")
class DfsReferralDataInternalTest {

    @Mock
    private DfsReferralDataInternal mockReferralData;

    @Mock
    private DfsReferralData mockDfsReferralData;

    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.dfs.DfsReferralDataInternal#setCacheMap(java.util.Map)
     */
    @Override
    public void setCacheMap(final Map<String, DfsReferralDataInternal> map) {
        this.map = map;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.dfs.DfsReferralDataInternal#replaceCache()
     */
    @Override
    public void replaceCache() {

            assertSame(referralData, unwrapped);
        }

        @Test
        @DisplayName("Should unwrap to DfsReferralDataInternal interface")
        void testUnwrapToDfsReferralDataInternal() {
            DfsReferralDataInternal unwrapped = referralData.unwrap(DfsReferralDataInternal.class);
            assertSame(referralData, unwrapped);
        }

        @Test

import jcifs.SmbTreeHandle;
import jcifs.internal.CommonServerMessageBlockRequest;
import jcifs.internal.CommonServerMessageBlockResponse;
import jcifs.internal.RequestWithPath;
import jcifs.internal.dfs.DfsReferralDataInternal;
import jcifs.internal.smb1.com.SmbComClose;
import jcifs.internal.smb1.com.SmbComFindClose2;
import jcifs.internal.smb1.trans.nt.NtTransQuerySecurityDesc;
import jcifs.util.transport.TransportException;

/**