Example usage of Laravels Spatie Snapshot testing package being used on a JsonResource output and a FormRequest rules array

UserHttpSnapshotTest.php

<?php

namespace Tests\Snapshots;

use Illuminate\Http\Resources\Json\JsonResource;
use Spatie\Snapshots\MatchesSnapshots;
use Tests\TestCase;
use Illuminate\Foundation\Testing\WithFaker;
use Illuminate\Foundation\Testing\RefreshDatabase;
use App\Models\User;
use App\Http\Resources\UserResource;
use App\Http\Requests\UserStoreRequest;

class UserHttpSnapshotTest extends TestCase
{
    use RefreshDatabase, WithFaker, MatchesSnapshots;

    protected function setUp(): void
    {
        parent::setUp();

        // replace the faker with a predicable seed so the values stay the same
        $this->app->bind(\Faker\Generator::class, function () {
            $faker = \Faker\Factory::create();
            $faker->seed(1);

            return $faker;
        });
    }

    /**
     * @test
     */
    public function it_can_create_snapshots_for_users_resource()
    {
        /** @var User */
        $user = User::factory()->create([
            'name' => 'Fake User',
            'email' => 'someone@example.com',
        ]);

        /** @var JsonResource */
        $resource = new UserResource($user->load('profile', 'settings'));

        $this->assertMatchesJsonSnapshot($resource->toJson());
    }

    /**
     * @test
     */
    public function it_can_check_the_output_of_the_user_request_rules()
    {
        /** @var array */
        $rules = app()->call([new UserStoreRequest, 'rules']);

        $this->assertMatchesJsonSnapshot(json_encode($rules));
    }
}