assertEquals("dfs-share", l.getShare());

        // Path consumed negative -> coerced to 0
        when(dr.getPathConsumed()).thenReturn(-1);
        String unc2 = l.handleDFSReferral(dr, null);
        assertTrue(unc2.contains("dfs/path") || unc2.contains("dfs\\path"));
    }

    @Test
    @DisplayName("toString includes URL and cached fields")
    void testToString() {

    public String getUNCPath() {
        if (this.unc == null) {
            canonicalizePath();
        }
        return this.unc;
    }

    @Override
    public String getURLPath() {
        if (this.unc == null) {
            canonicalizePath();
        }
        return this.canon;
    }

    @Override
    public String getShare() {
        if (this.unc == null) {
            canonicalizePath();

        return normalized;
    }

    /**
     * Validate UNC path
     */
    private void validateUncPath(String path) throws SmbException {
        // UNC path should have format: \\server\share[\path]
        if (!path.startsWith("\\\\") && !path.startsWith("//")) {
            throw new SmbException("Invalid UNC path format");
        }

        String[] parts = path.substring(2).split("[\\\\/]");

        // Test UNC path with special characters
        String specialUNCPath = "\\\\server\\share\\folder with spaces\\file!@#$.txt";
        testImplementation.setFullUNCPath("DOMAIN", "server", specialUNCPath);
        assertEquals(specialUNCPath, testImplementation.getFullUNCPath());
    }

    @Test
    @DisplayName("Test with various UNC path formats")
    void testVariousUNCPathFormats() {

        final String unc = loc.getUNCPath();
        final String p = loc.getURL().getPath();
        if (p.lastIndexOf('/') != p.length() - 1) {
            throw new SmbException(loc.getURL() + " directory must end with '/'");
        }
        if (unc.lastIndexOf('\\') != unc.length() - 1) {
            throw new SmbException(unc + " UNC must end with '\\'");
        }

            strictValidator.validatePath("//server\u0001/share");
        });

        // Note: Proper UNC validation would require fixing the normalization to preserve \\
        // for UNC paths. Current implementation can't distinguish UNC paths after normalization.
    }

    @Test
    public void testInvalidUncServerName() throws Exception {

                if (LogStream.level >= 4) {
                    SmbTransport.log.println("treeConnect: unc=" + unc + ",service=" + service);
                }

                final SmbComTreeConnectAndXResponse response = new SmbComTreeConnectAndXResponse(andxResponse);
                final SmbComTreeConnectAndX request = new SmbComTreeConnectAndX(session, unc, service, andx);
                session.send(request, response);

            final int access, final int attrs, final int options, final long initialSize) {
        this.cfg = cfg;
        this.fileId = fid;
        this.initialSize = initialSize;
        this.fid = 0;
        this.unc = unc;
        this.flags = flags;
        this.access = access;
        this.attrs = attrs;

    }

    @Test
    void testPreservationOfDoubleSlashes() {
        assertEquals("scm:hg:ssh://localhost//home/user", normalize("scm:hg:ssh://localhost//home/user"));
        assertEquals("file:////UNC/server", normalize("file:////UNC/server"));
        assertEquals(
                "[fetch=]http://server.org/[push=]ssh://server.org/",
                normalize("[fetch=]http://server.org/[push=]ssh://server.org/"));
    }

    @Test

            } catch (final SmbException se) {
                fp = 0L;
            }
        }
        if (file instanceof SmbNamedPipe && file.unc.startsWith("\\pipe\\")) {
            file.unc = file.unc.substring(5);
            file.send(new TransWaitNamedPipe("\\pipe" + file.unc), new TransWaitNamedPipeResponse());
        }
        file.open(openFlags, access | SmbConstants.FILE_WRITE_DATA, SmbFile.ATTR_NORMAL, 0);