public function __construct()
 {
     $this->fetchFormat = FetchFormat::fromString(Format::FETCH_FORMAT_AUTO);
     $this->crop = 'pad';
     $this->format = Format::fromExtension('jpg');
     $this->validFormats = array('gif', 'jpg', 'png', 'svg');
 }
 function it_builds_with_jpeg_format_when_original_extension_is_not_valid()
 {
     $transformationArray = self::builder()->withFormat(Format::fromExtension('xpm'))->build();
     $transformationArray->offsetGet('format')->shouldBe('jpg');
 }