Cviebrock\EloquentSluggable\Tests\BaseTests::testSlugFromRelatedModel PHP Method

    public function testSlugFromRelatedModel()
    {
        $author = Author::create(['name' => 'Arthur Conan Doyle']);
        $post = new PostWithRelation(['title' => 'First']);
        $post->author()->associate($author);
        $post->save();
        $this->assertEquals('arthur-conan-doyle-first', $post->slug);
    }