public function test_index_returns_configs_by_get()
 {
     Config::whereNotNull('field')->delete();
     $configs = factory(Config::class, 3)->create();
     $this->get('api/v1/config');
     $this->seeStatusCode(200);
     foreach ($configs as $config) {
         $this->seeJson(['field' => $config->field]);
     }
 }