public function test_index_returns_billets_by_get()
{
Billet::where('id', '>=', 1)->delete();
$billets = factory(Billet::class, 3)->create();
$this->get('api/v1/billet');
$this->seeStatusCode(200);
foreach ($billets as $billet) {
$this->seeJson(['amount' => $billet->amount]);
}
}