public function testChangeBackgroundBlackImage()
{
$image = new Image(__DIR__ . '/../../Fixtures/upload/black.png');
$image->getGd()->addFilter(new Background('#FFF'));
$base64 = $image->getBase64();
$this->assertEquals(16, $image->getWidth());
$this->assertEquals(16, $image->getHeight());
$this->assertEquals('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAIAAACQkWg2AAAAGUlEQVQokWP8//8/AymAiSTVoxpGNQwpDQBVbQMd5EZaEgAAAABJRU5ErkJggg==', $base64);
}