when(mockTransportPool.getSmbTransport(any(), anyString(), anyInt(), anyBoolean(), anyBoolean())).thenReturn(mockTransport);
        when(mockTransport.unwrap(any())).thenReturn(mockTransport);
        when(mockTransport.getDfsReferrals(any(), anyString(), anyString(), anyString(), anyInt())).thenReturn(null);
        assertNull(dfsResolver.getDc(mockContext, "anyDomain"));
    }

    // Test for resolve method
    @Test

            }
        }

        return result;
    }

    @Override
    public DfsReferralData getDfsReferrals(CIFSContext ctx, String name, String targetHost, String targetDomain, int rn)
            throws CIFSException {
        return delegate.getDfsReferrals(ctx, name, targetHost, targetDomain, rn);
    }

    @Override
    public boolean isSigningOptional() throws SmbException {

        DfsReferral referral = new DfsReferral();
        referral.server = "dc1.domain.com";
        referral.next = referral;
        lenient().when(smbTransport.getDfsReferrals(auth, "\\domain.com", 1)).thenReturn(referral);

        UniAddress dcAddress = mock(UniAddress.class);
        lenient().when(UniAddress.getByName("dc1.domain.com")).thenReturn(dcAddress);

     * @param rn the referral number
     * @return dfs referral
     * @throws SmbException if an SMB error occurs
     * @throws CIFSException if a CIFS error occurs
     */
    DfsReferralData getDfsReferrals(CIFSContext ctx, String name, String targetHost, String targetDomain, int rn) throws CIFSException;

    /**
     * Checks if message signing is supported but not mandatory.
     *