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); }