assertEquals("TESTHOST<00>/192.168.1.1", nbtAddress.toString());
    }

    // Tests for methods that call checkData(CIFSContext tc)
    @Test
    void testIsGroupAddress_CheckDataCalled() throws UnknownHostException {
        // Test isGroupAddress when checkData is called (hostName is unknown)
        when(mockContext.getNameServiceClient()).thenReturn(mockNameServiceClient);