public function test_index_returns_classrooms_by_get()
 {
     DB::statement('SET FOREIGN_KEY_CHECKS=0;');
     Classroom::where('id', '>=', 1)->delete();
     DB::statement('SET FOREIGN_KEY_CHECKS=1;');
     $classrooms = factory(Classroom::class, 3)->create();
     $this->get('api/v1/classroom');
     $this->seeStatusCode(200);
     foreach ($classrooms as $classroom) {
         $this->seeJson(['name' => $classroom->name]);
     }
 }
 /**
  * Determine if the user is authorized to make this request.
  *
  * @return bool
  */
 public function authorize()
 {
     $id = $this->route('classroom_id');
     return Classroom::where('id', $id)->exists();
 }