void testIsValidTid() {
            // Given
            when(mockResponse.isValidTid()).thenReturn(true);

            // When
            boolean isValid = mockResponse.isValidTid();

            // Then
            assertTrue(isValid, "Should indicate valid TID");
            verify(mockResponse).isValidTid();
        }
    }

    /**
     * Tests for SMB2 implementation of TreeConnectResponse

    @Override
    public final boolean isShareDfs() {
        return this.shareIsInDfs;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.TreeConnectResponse#isValidTid()
     */
    @Override
    public boolean isValidTid() {
        return getTid() != 0xFFFF;
    }

    @Override
    protected int writeParameterWordsWireFormat(final byte[] dst, final int dstIndex) {
        return 0;
    }

        when(config.getPid()).thenReturn(1234);

        SmbComTreeConnectAndXResponse response = mock(SmbComTreeConnectAndXResponse.class);
        when(response.getService()).thenReturn("A:");
        when(response.isValidTid()).thenReturn(true);
        when(response.getTid()).thenReturn(1);
        when(session.send(any(), any())).thenReturn(response);
        when(config.isIpcSigningEnforced()).thenReturn(false);

    boolean isShareDfs();

    /**
     * Indicates whether the tree connection has been successfully established and has a valid tree ID.
     *
     * @return whether the tree id is a valid one
     */
    boolean isValidTid();

        setTreeIdMethod.invoke(response, -1);
        assertFalse(response.isValidTid());

        // Test valid TID
        setTreeIdMethod.invoke(response, 100);
        assertTrue(response.isValidTid());

        // Test zero TID (valid)
        setTreeIdMethod.invoke(response, 0);
        assertTrue(response.isValidTid());
    }

    @Test
    @DisplayName("Should return null for getService")

     *
     * @see jcifs.internal.TreeConnectResponse#getTid()
     */
    @Override
    public final int getTid() {
        return getTreeId();
    }

    @Override
    public boolean isValidTid() {
        return getTreeId() != -1;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.TreeConnectResponse#getService()
     */
    @Override

     * @throws IOException
     */
    private void treeConnected(final SmbTransportImpl transport, final SmbSessionImpl sess, final TreeConnectResponse response)
            throws CIFSException {
        if (!response.isValidTid()) {
            throw new SmbException("TreeID is invalid");
        }
        this.tid = response.getTid();
        final String rsvc = response.getService();
        if (rsvc == null && !transport.isSMB2()) {