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

        // 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

package org.codelibs.fess.opensearch.user.exentity;

import java.util.HashMap;
import java.util.Map;

import org.codelibs.fess.opensearch.user.bsentity.BsGroup;

/**
 * @author FreeGen
 */
public class Group extends BsGroup {

    private static final long serialVersionUID = 1L;

    private Map<String, String> attributes;

    public Long getVersionNo() {
        return asDocMeta().version();
    }

        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]);

        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) {

Shinsuke Sugaya <******@****.***> 1638450896 +0900

     * This method retrieves only direct group memberships and collects group IDs for later
     * asynchronous parent group lookup.
     * @param user The Entra ID user.
     * @param groupList The list to add group names to.
     * @param roleList The list to add role names to.
     * @param groupIdsForParentLookup The list to collect group IDs for later parent lookup.

        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() {

        });

    }

    /**
     * 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);

Shinsuke Sugaya <******@****.***> 1638450896 +0900