ldc-boutique-cnc-sable/tests/Unit/App/Services/CodeGenerationServiceTest.php

<?php

declare(strict_types=1);

namespace Tests\Unit\App\Services;

use App\Services\CodeGenerationService;
use Domain\Models\ValueObjects\Code;
use Domain\Models\ValueObjects\Matricule;
use Kwaadpepper\Serial\Converters\NativeBaseConverter;
use Kwaadpepper\Serial\SerialCasterBuilder;
use Kwaadpepper\Serial\Shufflers\FisherYatesShuffler;

covers(CodeGenerationService::class);

describe('CodeGenerationService', function (): void {
    it('generates a valid code of exactly 6 characters from matricule', function (): void {
        // GIVEN
        $builder = (new SerialCasterBuilder(new NativeBaseConverter()))
            ->withShuffler(new FisherYatesShuffler())
            ->withSeed(12345);

        $service   = new CodeGenerationService($builder);
        $matricule = new Matricule('0100759');

        // WHEN
        $code = $service->generateFrom($matricule);

        // THEN
        expect($code)->toBeInstanceOf(Code::class)
            ->and(strlen($code->value))->toBe(Code::LENGTH)
            ->and(preg_match('/^[' . Code::ALLOWED_CHARACTERS . ']+$/', $code->value))->toBe(1);
    });

    it('generates deterministic codes for the same matricule', function (): void {
        // GIVEN
        $builder = (new SerialCasterBuilder(new NativeBaseConverter()))
            ->withShuffler(new FisherYatesShuffler())
            ->withSeed(12345);

        $service   = new CodeGenerationService($builder);
        $matricule = new Matricule('0100759');

        // WHEN
        $code1 = $service->generateFrom($matricule);
        $code2 = $service->generateFrom($matricule);

        // THEN
        expect($code1->value)->toBe($code2->value);
    });

    it('generates different codes for different matricules', function (): void {
        // GIVEN
        $builder = (new SerialCasterBuilder(new NativeBaseConverter()))
            ->withShuffler(new FisherYatesShuffler())
            ->withSeed(12345);

        $service = new CodeGenerationService($builder);

        // WHEN
        $code1 = $service->generateFrom(new Matricule('0100759'));
        $code2 = $service->generateFrom(new Matricule('0100760'));

        // THEN
        expect($code1->value)->not->toBe($code2->value);
    });
});