public function test220ResponseIsSentWhenStoppedAndStarted()
 {
     $connection = new Swift_Connection_NativeMail();
     $connection->start();
     $this->assertPattern("~^220\\b~", $connection->read());
     $connection->write("foo");
     $this->assertNoPattern("~^220\\b~", $connection->read());
     $connection->stop();
     $connection->start();
     $this->assertPattern("~^220\\b~", $connection->read());
 }