class UserEntityReferenceTest

class UserEntityReferenceTest extends EntityKernelTestBase {
    use EntityReferenceFieldCreationTrait;
    
    /**
     * A randomly-generated role for testing purposes.
     *
     * @var \Drupal\user\RoleInterface
     */
    protected $role1;
    
    /**
     * A randomly-generated role for testing purposes.
     *
     * @var \Drupal\user\RoleInterface
     */
    protected $role2;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->role1 = Role::create([
            'id' => $this->randomMachineName(8),
            'label' => $this->randomMachineName(8),
        ]);
        $this->role1
            ->save();
        $this->role2 = Role::create([
            'id' => $this->randomMachineName(8),
            'label' => $this->randomMachineName(8),
        ]);
        $this->role2
            ->save();
        $this->createEntityReferenceField('user', 'user', 'user_reference', 'User reference', 'user');
    }
    
    /**
     * Tests user selection by roles.
     */
    public function testUserSelectionByRole() : void {
        $field_definition = FieldConfig::loadByName('user', 'user', 'user_reference');
        $handler_settings = $field_definition->getSetting('handler_settings');
        $handler_settings['filter']['role'] = [
            $this->role1
                ->id() => $this->role1
                ->id(),
            $this->role2
                ->id() => 0,
        ];
        $handler_settings['filter']['type'] = 'role';
        $field_definition->setSetting('handler_settings', $handler_settings);
        $field_definition->save();
        // cspell:ignore aabb aabbb aabbbb aabbbb
        $user1 = $this->createUser([], 'aabb');
        $user1->addRole($this->role1
            ->id())
            ->save();
        $user2 = $this->createUser([], 'aabbb');
        $user2->addRole($this->role1
            ->id())
            ->save();
        $user3 = $this->createUser([], 'aabbbb');
        $user3->addRole($this->role2
            ->id())
            ->save();
        
        /** @var \Drupal\Core\Entity\EntityAutocompleteMatcherInterface $autocomplete */
        $autocomplete = \Drupal::service('entity.autocomplete_matcher');
        $matches = $autocomplete->getMatches('user', 'default', $field_definition->getSetting('handler_settings'), 'aabb');
        $this->assertCount(2, $matches);
        $users = [];
        foreach ($matches as $match) {
            $users[] = $match['label'];
        }
        $this->assertContains($user1->label(), $users);
        $this->assertContains($user2->label(), $users);
        $this->assertNotContains($user3->label(), $users);
        $matches = $autocomplete->getMatches('user', 'default', $field_definition->getSetting('handler_settings'), 'aabbbb');
        $this->assertCount(0, $matches);
    }

}