/** @test */
public function it_deletes_all_specified_relations()
{
$user = User::create([]);
$author = Author::create(['user_id' => $user->id]);
$post = Post::create(['author_id' => $author->id]);
$comment = Comment::create(['post_id' => $post->id]);
$user = $user->fresh();
$this->assertEquals($user->author()->count(), 1, 'author');
$this->assertEquals($user->author()->first()->posts()->count(), 1, 'posts');
$this->assertEquals($user->author()->first()->posts()->first()->comments()->count(), 1, 'comments');
$user->delete();
$this->assertEquals(Post::where('author_id', 1)->count(), 0, 'post 0');
$this->assertEquals(Comment::where('post_id', 1)->count(), 0, 'comment 0');
$this->assertEquals(Author::where('user_id', 1)->count(), 0, 'user 0');
}