assertTrue(nbtAddress.isGroupAddress(mockContext));
        verify(mockNameServiceClient).getNbtAllByAddress(any(NetbiosAddress.class));
    }

    @Test
    void testIsGroupAddress_NoCheckDataCall() throws UnknownHostException {
        // Test isGroupAddress when checkData is NOT called (hostName is known)

        byte[] nodeAddress = addrEntry[0].getAddress();
        assertNotNull(nodeAddress, "Node address should not be null");
        // Note: Cannot test isGroupAddress() and getNodeType() without CIFSContext in unit test
        // These methods require network operations and are integration test material
    }

    @Test

     *            context to use
     * @return whether the given address is a group address
     *
     * @throws UnknownHostException
     *             if the host cannot be resolved to find out.
     */
    boolean isGroupAddress(CIFSContext tc) throws UnknownHostException;

    /**
     * Checks the node type of this address.
     *
     * @param tc
     *            context to use
     * @return {@link jcifs.netbios.NbtAddress#B_NODE},

        if (!this.isDataFromNodeStatus) {
            tc.getNameServiceClient().getNbtAllByAddress(this);
        }
    }

    @Override
    public boolean isGroupAddress(final CIFSContext tc) throws UnknownHostException {
        checkData(tc);
        return this.groupName;
    }

    @Override
    public int getNodeType(final CIFSContext tc) throws UnknownHostException {

     *
     * @return true if this is a group address, false otherwise
     * @throws UnknownHostException if the host cannot be resolved to find out.
     */

    public boolean isGroupAddress() throws UnknownHostException {
        checkData();
        return groupName;
    }

    /**
     * Checks the node type of this address.
     * @return {@link jcifs.smb1.netbios.NbtAddress#B_NODE},