feat: enable entering additional remarks in offer confirmation

tests/Form/Model/OfferAcceptDtoTest.php

@@ -0,0 +1,54 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Form\Model;
+
+use App\Form\Model\OfferAcceptDto;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Validator\Validation;
+use Symfony\Component\Validator\Validator\ValidatorInterface;
+
+class OfferAcceptDtoTest extends TestCase
+{
+    public function testAcceptedTermsWithoutRemarksIsValid(): void
+    {
+        $violations = $this->validator()->validate(new OfferAcceptDto(termsAccepted: true));
+
+        self::assertCount(0, $violations);
+    }
+
+    public function testUncheckedTermsAreRejected(): void
+    {
+        $violations = $this->validator()->validate(new OfferAcceptDto(remarks: 'Bitte Zimmer im EG'));
+
+        self::assertCount(1, $violations);
+        self::assertSame('termsAccepted', $violations[0]->getPropertyPath());
+        self::assertSame('Bitte akzeptiere die AGB, um die Buchung abzuschließen.', $violations[0]->getMessage());
+    }
+
+    public function testRemarksAreCappedAt2000Characters(): void
+    {
+        $dto = new OfferAcceptDto(termsAccepted: true, remarks: str_repeat('a', 2001));
+
+        $violations = $this->validator()->validate($dto);
+
+        self::assertCount(1, $violations);
+        self::assertSame('remarks', $violations[0]->getPropertyPath());
+        self::assertSame('Die Anmerkungen dürfen maximal 2000 Zeichen lang sein.', $violations[0]->getMessage());
+    }
+
+    public function testRemarksAtTheLimitAreAccepted(): void
+    {
+        $dto = new OfferAcceptDto(termsAccepted: true, remarks: str_repeat('a', 2000));
+
+        self::assertCount(0, $this->validator()->validate($dto));
+    }
+
+    private function validator(): ValidatorInterface
+    {
+        return Validation::createValidatorBuilder()
+            ->enableAttributeMapping()
+            ->getValidator();
+    }
+}