feat(mail) : MailConfiguration entity + repository + singleton test

tests/Unit/Repository/MailConfigurationRepositoryTest.php

@@ -0,0 +1,50 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit\Repository;
+
+use App\Entity\MailConfiguration;
+use App\Repository\MailConfigurationRepository;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
+
+/**
+ * @internal
+ */
+class MailConfigurationRepositoryTest extends KernelTestCase
+{
+    private MailConfigurationRepository $repository;
+    private EntityManagerInterface $em;
+
+    protected function setUp(): void
+    {
+        self::bootKernel();
+        $container        = static::getContainer();
+        $this->repository = $container->get(MailConfigurationRepository::class);
+        $this->em         = $container->get('doctrine.orm.entity_manager');
+        $this->em->getConnection()->executeStatement('TRUNCATE TABLE mail_configuration RESTART IDENTITY CASCADE');
+    }
+
+    public function testFindSingletonReturnsNullWhenEmpty(): void
+    {
+        $result = $this->repository->findSingleton();
+
+        self::assertNull($result);
+    }
+
+    public function testFindSingletonReturnsFirstRecord(): void
+    {
+        $config = new MailConfiguration();
+        $config->setImapHost('ssl0.ovh.net');
+        $config->setEnabled(false);
+        $this->em->persist($config);
+        $this->em->flush();
+
+        $result = $this->repository->findSingleton();
+
+        self::assertInstanceOf(MailConfiguration::class, $result);
+        self::assertSame('ssl0.ovh.net', $result->getImapHost());
+        self::assertFalse($result->isEnabled());
+    }
+}