assertNotNull(groupNames);
        assertEquals(2, groupNames.length);
        assertEquals("group1", groupNames[0]);
        assertEquals("group2", groupNames[1]);
    }

    @Test
    public void test_getGroupNames_empty() {
        // Test when no groups match the prefix
        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {
            @Override

	"github.com/pkg/sftp"
	"golang.org/x/crypto/ssh"
)

const (
	kexAlgoDH1SHA1                = "diffie-hellman-group1-sha1"
	kexAlgoDH14SHA1               = "diffie-hellman-group14-sha1"
	kexAlgoDH14SHA256             = "diffie-hellman-group14-sha256"
	kexAlgoDH16SHA512             = "diffie-hellman-group16-sha512"
	kexAlgoECDH256                = "ecdh-sha2-nistp256"
	kexAlgoECDH384                = "ecdh-sha2-nistp384"

        assertNull(user.getGroups());

        final String[] groups = new String[] { "group1", "group2" };
        user.setGroups(groups);
        assertNotNull(user.getGroups());
        assertEquals(2, user.getGroups().length);
        assertEquals("group1", user.getGroups()[0]);
        assertEquals("group2", user.getGroups()[1]);
    }

    @Test
    public void test_user_roles() {

        form.groups = new String[] { "group1", "group2" };

        assertNotNull(form.roles);
        assertEquals(2, form.roles.length);
        assertEquals("admin", form.roles[0]);
        assertEquals("user", form.roles[1]);

        assertNotNull(form.groups);
        assertEquals(2, form.groups.length);
        assertEquals("group1", form.groups[0]);
        assertEquals("group2", form.groups[1]);

        // Test with empty groups
        groups = new String[] {};
        user = new TestFessUser("testuser", new String[] {}, groups, new String[] {});
        assertArrayEquals(groups, user.getGroupNames());

        // Test with null groups
        user = new TestFessUser("testuser", new String[] {}, null, new String[] {});
        assertNull(user.getGroupNames());

        // Test with groups containing spaces

	return tgts, errs
}

// Split targets into two groups:
//
//	group1 contains all targets of type t
//	group2 contains the remaining targets
func splitTargets(targets []Target, t types.TargetType) (group1 []Target, group2 []Target) {
	for _, target := range targets {
		if target.Type() == t {
			group1 = append(group1, target)
		} else {
			group2 = append(group2, target)
		}
	}
	return group1, group2
}

        for (int i = 0; i < 5; i++) {
            List<String> groups = new ArrayList<>();
            groups.add("group_" + i);
            List<String> roles = new ArrayList<>();
            List<String> groupIds = new ArrayList<>();
            groupIds.add("id_" + i);

            try {
                method.invoke(authenticator, null, groups, roles, groupIds);
            } catch (Exception e) {

        });

    }

    /**
     * Deletes a group from both LDAP and the database, and removes the group
     * association from all users that belong to this group.
     *
     * @param group the group entity to delete
     */
    public void delete(final Group group) {
        ComponentUtil.getLdapManager().delete(group);

        groupBhv.delete(group, op -> {
            op.setRefreshPolicy(Constants.TRUE);

						return
					}
				}
				if _, gerr := globalIAMSys.AddUsersToGroup(ctx, group, grpInfo.Members); gerr != nil {
					failed.Groups = append(failed.Groups, madmin.IAMErrEntity{Name: group, Error: err})
				} else {
					added.Groups = append(added.Groups, group)
				}
			}
		}
	}

	// import service accounts
	{

    groups.add(ImmutableList.copyOf(group));
    return this;
  }

  public void test() {
    for (int groupNumber = 0; groupNumber < groups.size(); groupNumber++) {
      ImmutableList<T> group = groups.get(groupNumber);
      for (int itemNumber = 0; itemNumber < group.size(); itemNumber++) {
        // check related items in same group