@Test
    @DisplayName("Setters accept null and getters return null")
    void settersAcceptNull() {
        TestSpnegoToken t = new TestSpnegoToken();
        t.setMechanismToken(null);
        t.setMechanismListMIC(null);
        assertNull(t.getMechanismToken(), "mechanismToken should be null after setting null");
        assertNull(t.getMechanismListMIC(), "mechanismListMIC should be null after setting null");
    }

    private final URL url;

    private DfsReferralData dfsReferral = null; // For getDfsPath() and getServerWithDfs()

    private String unc; // Initially null; set by getUncPath; never ends with '/'
    private String uncBeforeDfsReferal;
    private String canon; // Initially null; set by getUncPath; dir must end with '/'
    private String share; // Can be null

    private Address[] addresses;
    private int addressIndex;

        return "Type2Message[target=" + target + ",challenge=" + (challenge == null ? "null" : "<" + challenge.length + " bytes>")
                + ",context=" + (context == null ? "null" : "<" + context.length + " bytes>") + ",targetInformation="
                + (targetInformation == null ? "null" : "<" + targetInformation.length + " bytes>") + ",flags=0x"

        }
    }

    public void test_process_withNullParameters() throws IOException, ServletException {
        // Test null parameter handling
        TestWebApiManager manager = new TestWebApiManager("/api");

        try {
            manager.process(null, null, null);
            assertTrue(manager.isProcessCalled());
        } catch (NullPointerException e) {
            // Expected for some implementations

            return null;
        }

        @Override
        public StringBuffer getRequestURL() {
            return null;
        }

        @Override
        public HttpSession getSession(boolean create) {
            return null;
        }

        @Override
        public HttpSession getSession() {
            return null;
        }

        @Override

        }

        @Test
        @DisplayName("doEnum with null parent throws NullPointerException")
        void doEnum_withNullParent_throwsNpe() {
            assertThrows(NullPointerException.class, () -> SmbEnumerationUtil.doEnum(null, "*", 0, null, null));
        }
    }

    @Nested
    @DisplayName("Wrapper behaviors")
    class WrapperBehaviorTests {

        @Test

        // Filter accepts only when name is exactly null, otherwise false
        SmbFilenameFilter filter = (dir, n) -> n == null;

        boolean result = filter.accept(mockDir, name);

        if (name == null) {
            assertTrue(result, "Null name should be accepted by this filter");
        } else {
            assertFalse(result, "Non-null names should be rejected by this filter");
        }

        CIFSException last = null;
        final RequestWithPath rpath = request instanceof RequestWithPath r ? r : null;
        final String savedPath = rpath != null ? rpath.getPath() : null;
        final String savedFullPath = rpath != null ? rpath.getFullUNCPath() : null;

        final String fullPath = "\\" + loc.getServer() + "\\" + loc.getShare() + loc.getUNCPath();

        Smb2NegotiateResponse r = null;
        byte[] negoReqBuffer = null;
        byte[] negoRespBuffer = null;
        try {
            smb2neg.setRequestCredits(Math.max(1, this.desiredCredits - this.credits.availablePermits()));

            final int reqLen = negotiateWrite(smb2neg, first != null);

        NegTokenInit p4 = new NegTokenInit(tokenTag4);
        assertArrayEquals(mic, p4.getMechanismListMIC(), "MIC should be parsed from tag [4]");

        // Tag [3]
        byte[] tokenTag3 = buildInitToken(new ASN1ObjectIdentifier[] { OID_KRB }, null, null, mic, false, null, null, null);
        NegTokenInit p3 = new NegTokenInit(tokenTag3);