assertThrows(CIFSException.class, () -> sidResolver.getServerSid(null, testServerName));
    }

    @Test
    void testGetServerSid_NullServerName() throws CIFSException {
        when(sidResolver.getServerSid(any(CIFSContext.class), eq(null))).thenThrow(new CIFSException("Server name cannot be null"));