class FileItemTest

class FileItemTest extends FieldUnitTestBase {

  /**
   * Modules to enable.
   *
   * @var array
   */
  public static $modules = array(
    'file',
  );

  /**
   * Created file entity.
   *
   * @var \Drupal\file\Plugin\Core\Entity\File
   */
  protected $file;
  public static function getInfo() {
    return array(
      'name' => 'File field item API',
      'description' => 'Tests using entity fields of the file field type.',
      'group' => 'File',
    );
  }
  public function setUp() {
    parent::setUp();
    $this
      ->installSchema('file', 'file_managed');
    $this
      ->installSchema('file', 'file_usage');
    $field = array(
      'field_name' => 'file_test',
      'type' => 'file',
      'cardinality' => FIELD_CARDINALITY_UNLIMITED,
    );
    field_create_field($field);
    $instance = array(
      'entity_type' => 'entity_test',
      'field_name' => 'file_test',
      'bundle' => 'entity_test',
    );
    field_create_instance($instance);
    file_put_contents('public://example.txt', $this
      ->randomName());
    $this->file = entity_create('file', array(
      'uri' => 'public://example.txt',
    ));
    $this->file
      ->save();
  }

  /**
   * Tests using entity fields of the file field type.
   */
  public function testFileItem() {

    // Create a test entity with the
    $entity = entity_create('entity_test', array());
    $entity->file_test->fid = $this->file
      ->id();
    $entity->file_test->display = 1;
    $entity->file_test->description = $description = $this
      ->randomName();
    $entity->name->value = $this
      ->randomName();
    $entity
      ->save();
    $entity = entity_load('entity_test', $entity
      ->id());
    $this
      ->assertTrue($entity->file_test instanceof FieldInterface, 'Field implements interface.');
    $this
      ->assertTrue($entity->file_test[0] instanceof FieldItemInterface, 'Field item implements interface.');
    $this
      ->assertEqual($entity->file_test->fid, $this->file
      ->id());
    $this
      ->assertEqual($entity->file_test->display, 1);
    $this
      ->assertEqual($entity->file_test->description, $description);
    $this
      ->assertEqual($entity->file_test->entity->uri, $this->file->uri);
    $this
      ->assertEqual($entity->file_test->entity
      ->id(), $this->file
      ->id());
    $this
      ->assertEqual($entity->file_test->entity
      ->uuid(), $this->file
      ->uuid());

    // Make sure the computed files reflects updates to the file.
    file_put_contents('public://example-2.txt', $this
      ->randomName());
    $file2 = entity_create('file', array(
      'uri' => 'public://example-2.txt',
    ));
    $file2
      ->save();
    $entity->file_test->fid = $file2
      ->id();
    $this
      ->assertEqual($entity->file_test->entity
      ->id(), $file2
      ->id());
    $this
      ->assertEqual($entity->file_test->entity->uri, $file2->uri);
  }

}