b2in/tests/Feature/TestDisplaySeederTest.php

<?php

declare(strict_types=1);

use App\Models\Display;
use Database\Seeders\TestDisplaySeeder;

it('seeds exactly one test display', function () {
    $this->seed(TestDisplaySeeder::class);

    expect(Display::query()->where('is_test', true)->count())->toBe(1);
});

it('is idempotent and does not create a second test display', function () {
    $this->seed(TestDisplaySeeder::class);
    $this->seed(TestDisplaySeeder::class);

    expect(Display::query()->where('is_test', true)->count())->toBe(1);
});