void testToString() {
        // Given
        exception = new SmbOperationException(SmbOperationException.ErrorCode.ACCESS_DENIED, "Cannot access share");
        exception.withContext("share", "\\\\server\\share");
        exception.withContext("user", "john");

        // When
        String str = exception.toString();

        // Then
        assertNotNull(str);

    class HappyPath {
        @Test
        void testBasicProperties() throws Exception {
            String url = "smb://server/share/path/file.txt";
            DummySmbResourceLocator loc = new DummySmbResourceLocator(url);
            assertEquals("file.txt", loc.getName());
            assertEquals("smb://server/share/path/", loc.getParent());
            assertEquals(url, loc.getPath());
            // canonicalisation simply removes '.' and '..'

        when(mockReferral.getPathConsumed()).thenReturn(15); // e.g., "\\\\server\\share".length()
        when(mockReferral.next()).thenReturn(mockReferral); // Simple loop for the do-while
        assertDoesNotThrow(() -> dfsImpl.cache(mockContext, "\\\\server\\share\\path", mockReferral));
    }

        serverAddress = InetAddress.getByName("192.168.1.100");
        registration = new WitnessRegistration("\\\\server\\share", serverAddress, WitnessServiceType.FILE_SERVER_WITNESS);
    }

    @Test
    void testRegistrationCreation() {
        assertNotNull(registration.getRegistrationId());
        assertEquals("\\\\server\\share", registration.getShareName());
        assertEquals(serverAddress, registration.getServerAddress());

     *
     * @return the registration ID
     */
    public String getRegistrationId() {
        return registrationId;
    }

    /**
     * Gets the share name.
     *
     * @return the share name
     */
    public String getShareName() {
        return shareName;
    }

    /**
     * Gets the server address.
     *
     * @return the server address
     */

        populatedArray.count = 3;
        populatedArray.s = new netdfs.DfsInfo200[3];

        // Create DFS root entries
        String[] rootNames = { "share1", "share2", "share3" };
        for (int i = 0; i < 3; i++) {
            netdfs.DfsInfo200 entry = new netdfs.DfsInfo200();
            entry.dfs_name = rootNames[i];
            populatedArray.s[i] = entry;
        }

    /**
     * Constructs a tree connect AndX request to establish a connection to a shared resource.
     *
     * @param ctx the CIFS context containing configuration
     * @param server the server data containing security information
     * @param path the UNC path to the shared resource
     * @param service the service type (e.g., "A:" for disk share, "LPT1:" for printer)
     * @param andx the next command in the AndX chain, or null
     */

    synchronized void insert(final String path, final DfsReferral dr) {
        int s1, s2;
        String server, share, key;

        if (DISABLED) {
            return;
        }

        s1 = path.indexOf('\\', 1);
        s2 = path.indexOf('\\', s1 + 1);
        server = path.substring(1, s1);
        share = path.substring(s1 + 1, s2);

        key = path.substring(0, dr.pathConsumed).toLowerCase();

        referral.server = "testServer";
        referral.share = "testShare";
        referral.link = "testLink";
        referral.path = "/test/path";
        referral.ttl = 300;
        referral.expiration = 1234567890L;
        referral.resolveHashes = true;

        // When
        String expectedString =

    @Test
    @DisplayName("handleDFSReferral handles null referral and empty path")
    void handleDfsReferralNullAndEmpty() {
        when(locator.handleDFSReferral(null, "")).thenReturn("smb://server/share/");
        assertEquals("smb://server/share/", locator.handleDFSReferral(null, ""));
        verify(locator).handleDFSReferral(null, "");
        verifyNoMoreInteractions(locator);
    }