public function testFileAdapter()
{
$options = ['mail_adapter' => 'file', 'file_options' => ['path' => __DIR__, 'callback' => function ($transport) {
return get_class($transport);
}]];
$this->initServiceLocator($options);
$mailService = $this->mailServiceFactory->__invoke($this->serviceLocator, 'acmailer.mailservice.default');
/* @var File $transport */
$transport = $mailService->getTransport();
$this->assertInstanceOf('Zend\\Mail\\Transport\\File', $transport);
$this->assertEquals($options['file_options']['path'], $transport->getOptions()->getPath());
$this->assertEquals($options['file_options']['callback'], $transport->getOptions()->getCallback());
}