public function testAdapterAsService()
{
$this->initServiceLocator(['mail_adapter' => 'my_transport_service']);
$transport = new Sendmail();
$this->serviceLocator->set('my_transport_service', $transport);
$mailService = $this->mailServiceFactory->__invoke($this->serviceLocator, 'acmailer.mailservice.default');
$this->assertSame($transport, $mailService->getTransport());
}