public function testLowPriority()
 {
     /** @var $imageFile ImageFile */
     $imageFile = $this->unistorage->uploadFile(FIXTURES_DIR . '/ImageFile.jpg');
     $this->assertInstanceOf('Unistorage\\Models\\Files\\ImageFile', $imageFile);
     $resultFile = $imageFile->convert('png', true, $this->unistorage);
     $this->assertTrue($resultFile instanceof ImageFile || $resultFile instanceof TemporaryFile || $resultFile instanceof PendingFile, 'Failed asserting type of resultFile after convert');
 }