public function setUp()
{
$index_reader = new FileReader(__DIR__ . '/../Fixtures/Packfiles/packfile.idx');
$this->index = new PackfileIndex($index_reader);
$pack_reader = new FileReader(__DIR__ . '/../Fixtures/Packfiles/packfile.pack');
$this->packfile = new Packfile($pack_reader);
$this->packfile->setIndex($this->index);
}