CakePHP routing to deeper layer in controller

CakePHP routing to deeper layer in controller

I tried creating multiple layer(folder) in controller and by rerouting
using like below.
Router::connect(
'/abc',
array('controller' => '/abc/test', 'action' => 'test')
);
Where from the understand of the full path in CakePHP it would be
app/Controller/abc/TestController
It was :Not Found: showing in the browser. I wonder if we can do multiple
layer down in CakePHP controller or what I can do in this case.