public function noStoreCacheDirectiveCanBeSetAndRemoved()
{
$headers = new Headers();
$headers->setCacheControlDirective('no-store');
$this->assertEquals('no-store', $headers->get('Cache-Control'));
$headers->setCacheControlDirective('public');
$this->assertEquals('public, no-store', $headers->get('Cache-Control'));
$headers->removeCacheControlDirective('no-store');
$this->assertEquals('public', $headers->get('Cache-Control'));
}