class ConfigFieldMapperTest

class ConfigFieldMapperTest extends UnitTestCase {
  
  /**
   * The configuration field mapper to test.
   *
   * @var \Drupal\config_translation\ConfigFieldMapper
   */
  protected $configFieldMapper;
  
  /**
   * The field config instance used for testing.
   *
   * @var \Drupal\field\FieldConfigInterface|\PHPUnit\Framework\MockObject\Stub
   */
  protected $entity;
  
  /**
   * The entity type manager used for testing.
   *
   * @var \Drupal\Core\Entity\EntityTypeManagerInterface|\PHPUnit\Framework\MockObject\Stub
   */
  protected $entityTypeManager;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->entityTypeManager = $this->createStub(EntityTypeManagerInterface::class);
    $this->entity = $this->createStub(FieldConfigInterface::class);
    $definition = [
      'class' => '\\Drupal\\config_translation\\ConfigFieldMapper',
      'base_route_name' => 'entity.field_config.node_field_edit_form',
      'title' => '@label field',
      'names' => [],
      'entity_type' => 'field_config',
    ];
    $this->configFieldMapper = new ConfigFieldMapper('node_fields', $definition, $this->getConfigFactoryStub(), $this->createStub(TypedConfigManagerInterface::class), $this->createStub(LocaleConfigManager::class), $this->createStub(ConfigMapperManagerInterface::class), $this->createStub(RouteProviderInterface::class), $this->getStringTranslationStub(), $this->entityTypeManager, $this->createStub(LanguageManagerInterface::class), $this->createStub(EventDispatcherInterface::class));
  }
  
  /**
   * Tests ConfigFieldMapper::setEntity().
   */
  public function testSetEntity() : void {
    $entity_type = $this->createStub(ConfigEntityTypeInterface::class);
    $entity_type->method('getConfigPrefix')
      ->willReturn('config_prefix');
    $this->entityTypeManager
      ->method('getDefinition')
      ->willReturn($entity_type);
    $field_storage = $this->createStub(FieldStorageConfigInterface::class);
    $field_storage->method('id')
      ->willReturn('field_storage_id');
    $this->entity
      ->method('getFieldStorageDefinition')
      ->willReturn($field_storage);
    $result = $this->configFieldMapper
      ->setEntity($this->entity);
    $this->assertTrue($result);
    // Ensure that the configuration name was added to the mapper.
    $plugin_definition = $this->configFieldMapper
      ->getPluginDefinition();
    $this->assertContains('config_prefix.field_storage_id', $plugin_definition['names']);
    // Make sure setEntity() returns FALSE when called a second time.
    $result = $this->configFieldMapper
      ->setEntity($this->entity);
    $this->assertFalse($result);
  }

}