/**
* @requires extension fileinfo
*/
public function testGuessExtensionWithReset()
{
$file = new File(__DIR__ . '/Fixtures/other-file.example');
$guesser = $this->createMockGuesser($file->getPathname(), 'image/gif');
MimeTypeGuesser::getInstance()->register($guesser);
$this->assertEquals('gif', $file->guessExtension());
MimeTypeGuesser::reset();
$this->assertNull($file->guessExtension());
}
/**
* A helper function to register with Symfony's singleton MIME type guesser.
*
* Symfony's default mimetype guessers have dependencies on PHP's fileinfo
* extension or being able to run the system command file. Drupal's guesser
* does not have these dependencies.
*
* @see \Symfony\Component\HttpFoundation\File\MimeType\MimeTypeGuesser
*/
public static function registerWithSymfonyGuesser(ContainerInterface $container)
{
// Reset state, so we do not store more and more services during test runs.
SymfonyMimeTypeGuesser::reset();
$singleton = SymfonyMimeTypeGuesser::getInstance();
$singleton->register($container->get('file.mime_type.guesser'));
}