public function testAddMultipleLogger()
{
$builder = new CommandBuilder(new MockEnvironment());
$logger = new MockPsrLogger();
$command = $builder->addArgument('test')->setCommand('./tests/commands/unix/test_binary')->addProcessObserver(new AllLogger($logger))->addProcessObserver(new NullProcessObserver($logger))->buildCommand();
$this->assertInstanceOf('ptlis\\ShellCommand\\Logger\\AggregateLogger', \PHPUnit_Framework_TestCase::readAttribute($command, 'processObserver'));
// Todo test internals of AggregateLogger?
}
