Test basic BlogPost model functionalities using Laravel Tinker

tinker_test_blogpost_model_basic.sh

>>> $bp = new BlogPost;
=> App\Models\BlogPost {#4238}
>>> $bp->title = 'My title';
=> "My title"
>>> $bp->content = 'Some content long content';
=> "Some content long content"
>>> $bp->author_name = 'My Name';
=> "My Name"
>>> $bp->save();
=> true
>>> $bp->all();
=> Illuminate\Database\Eloquent\Collection {#3833
     all: [
       App\Models\BlogPost {#4201
         id: 1,
         title: "My title",
         content: "Some content long content",
         author_name: "My Name",
         created_at: "2022-01-11 15:13:43",
         updated_at: "2022-01-11 15:13:43",
       },
     ],
   }