void testDfsBehavior() {
        SmbResourceLocatorImpl l = locator("smb://server/share/path");
        assertNull(l.getDfsReferral());

        DfsReferralData dr = mock(DfsReferralData.class);
        when(dr.getServer()).thenReturn("dfs-server");
        when(dr.getShare()).thenReturn("dfs-share");
        when(dr.getPath()).thenReturn("dfs/path");

import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpSession;
import jcifs.Address;
import jcifs.CIFSContext;
import jcifs.CIFSException;
import jcifs.Config;
import jcifs.DfsReferralData;
import jcifs.NameServiceClient;
import jcifs.SmbConstants;
import jcifs.config.PropertyConfiguration;
import jcifs.context.BaseContext;
import jcifs.netbios.NbtAddress;
import jcifs.smb.DfsReferral;

import java.util.concurrent.atomic.AtomicLong;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import jcifs.Address;
import jcifs.CIFSContext;
import jcifs.CIFSException;
import jcifs.DfsReferralData;
import jcifs.DialectVersion;
import jcifs.SmbConstants;
import jcifs.SmbTransport;
import jcifs.audit.SecurityAuditLogger;
import jcifs.internal.CommonServerMessageBlock;

    @Mock
    private SmbTransportInternal transport;

    @Mock
    private jcifs.CIFSContext ctx;

    @Mock
    private SmbSession session;

    @Mock
    private jcifs.DfsReferralData referral;

    @BeforeEach
    void resetMocks() {
        Mockito.reset(transport, ctx, session, referral);
    }

    // Happy path: hasCapability returns based on provided capability codes