public function test_create_lesson()
{
$lesson = factory(Lesson::class)->create();
$this->assertInstanceOf(Lesson::class, $lesson);
$this->assertInstanceOf(Carbon::class, $lesson->created_at);
$this->assertInstanceOf(Carbon::class, $lesson->updated_at);
$this->seeInDatabase('lessons', ['name' => $lesson->name, 'description' => $lesson->description]);
}