FieldFile example

/** * Tests that alt and title attributes are included in transformed values. */
  public function testTransformAltTitle() {
    $executable = $this->prophesize(MigrateExecutableInterface::class)->reveal();
    $row = $this->prophesize(Row::class)->reveal();
    $migration = $this->prophesize(MigrationInterface::class)->reveal();

    $migrate_lookup = $this->prophesize(MigrateLookupInterface::class);
    $migrate_lookup->lookup('d6_file', [1])->willReturn([['fid' => 1]]);

    $plugin = new FieldFile([], 'd6_file', [], $migration, $migrate_lookup->reveal());

    $options = [
      'alt' => 'Foo',
      'title' => 'Bar',
    ];
    $value = [
      'fid' => 1,
      'list' => TRUE,
      'data' => serialize($options),
    ];