public SID getGroupSid() {
        return this.groupSid;
    }

    /**
     * Returns an array of group SIDs the user belongs to.
     * @return the group SIDs array
     */
    public SID[] getGroupSids() {
        return this.groupSids;
    }

    /**
     * Returns an array of resource group SIDs the user belongs to.
     * @return the resource group SIDs array
     */

        // Setup to return empty arrays
        when(logonInfo.getGroupSids()).thenReturn(new SID[0]);
        when(logonInfo.getExtraSids()).thenReturn(new SID[0]);
        when(logonInfo.getResourceGroupSids()).thenReturn(new SID[0]);

        // These should return empty arrays, not null
        assertNotNull(logonInfo.getGroupSids());
        assertEquals(0, logonInfo.getGroupSids().length);

        assertNotNull(logonInfo.getExtraSids());