Cannot send session cookie - headers already sent PHPUnit / Laravel

Question

I have this strange problem when i call the parent::setUp() on my TestCase class for unit test a class when i run phpunit it throw me this error:

Answer 1

In Laravel I avoided the issue by checking the environment and avoiding problematic code for 'testing' environment.

// Code working in Laravel 4.2
if(App::environment() != 'testing') {
        // this will be skipped when testing
        setcookie('key', $val, time() + (86400 * 999), '/');
}

NOTE - Warning: this means you cannot test this piece of code!