Enable the plugins coming with aggregator_test module.
function enableTestPlugins() {
config('aggregator.settings')
->set('fetcher', 'aggregator_test_fetcher')
->set('parser', 'aggregator_test_parser')
->set('processors', array(
'aggregator_test_processor' => 'aggregator_test_processor',
'aggregator' => 'aggregator',
))
->save();
}