/**
  * Tests user selection by roles.
  */
 function testUserSelectionByRole()
 {
     $field_definition = FieldConfig::loadByName('user', 'user', 'user_reference');
     $handler_settings = $field_definition->getSetting('handler_settings');
     $handler_settings['filter']['role'] = array($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();
     $user1 = $this->createUser(array('name' => 'aabb'));
     $user1->addRole($this->role1->id());
     $user1->save();
     $user2 = $this->createUser(array('name' => 'aabbb'));
     $user2->addRole($this->role1->id());
     $user2->save();
     $user3 = $this->createUser(array('name' => 'aabbbb'));
     $user3->addRole($this->role2->id());
     $user3->save();
     /** @var \Drupal\Core\Entity\EntityAutocompleteMatcher $autocomplete */
     $autocomplete = \Drupal::service('entity.autocomplete_matcher');
     $matches = $autocomplete->getMatches('user', 'default', $field_definition->getSetting('handler_settings'), 'aabb');
     $this->assertEqual(count($matches), 2);
     $users = array();
     foreach ($matches as $match) {
         $users[] = $match['label'];
     }
     $this->assertTrue(in_array($user1->label(), $users));
     $this->assertTrue(in_array($user2->label(), $users));
     $this->assertFalse(in_array($user3->label(), $users));
     $matches = $autocomplete->getMatches('user', 'default', $field_definition->getSetting('handler_settings'), 'aabbbb');
     $this->assertEqual(count($matches), 0, '');
 }
 /**
  * {@inheritdoc}
  */
 protected function getRoles()
 {
     return array($this->userRole->id() => $this->userRole);
 }