public function testGenerateVariationsWithLosslessParamTriggersPngConversion()
{
$listener = new ImageVariations(['database' => ['adapter' => $this->db], 'storage' => ['adapter' => $this->storage], 'widths' => [500], 'autoScale' => false, 'lossless' => true]);
$this->imageModel->method('getWidth')->willReturn(2048);
$this->eventManager->expects($this->at(1))->method('trigger')->with('image.transformation.convert', ['image' => $this->imageModel, 'params' => ['type' => 'png']]);
$listener->generateVariations($this->event);
}