Laravel 5 functional testing of class

I've read documentation at laravel site but it does have guide on how to test classes.

I have a class that implements an interface.

interface LeadDispatchingContract {

public function dispatch($leadId);

}

and the class that implements it

    public function __construct(Leads $leads, Teams $teams)
{
    $this->leads = $leads;
    $this->teams = $teams;
}

public function dispatch($lead)
{
    $this->notifyTeams($lead);
}

so basically, what im doing in controller is inject dependencies.

$leadDispatch->dispatch($lead); 

it works fine, now i want to create a functional testing for this so every time i make changes, test should run. any help?

via Chebli Mohamed