public function test_create_classroom()
{
$classroom = factory(Classroom::class)->create();
$this->assertInstanceOf(Classroom::class, $classroom);
$this->assertInstanceOf(Teacher::class, $classroom->teacher);
$this->assertInstanceOf(Schedule::class, $classroom->schedule);
$this->assertInstanceOf(Carbon::class, $classroom->created_at);
$this->assertInstanceOf(Carbon::class, $classroom->updated_at);
$this->seeInDatabase('classrooms', ['name' => $classroom->name]);
}