assertThrows(CIFSException.class, () -> sidResolver.getLocalGroupsMap(mockContext, testServerName, -1));
    }

    // Test with network errors
    @Test
    void testResolveSids_NetworkError() throws CIFSException {
        doThrow(new CIFSException("Network error occurred")).when(sidResolver)
                .resolveSids(any(CIFSContext.class), anyString(), any(SID[].class));