add fake session repository

tests/Fakes/FakeSessionRepository.php

@@ -0,0 +1,48 @@
+<?php
+
+namespace Tests\Fakes;
+
+use App\Auth\CreateSessionDto;
+use App\Auth\Session;
+use App\Auth\SessionRepository;
+
+class FakeSessionRepository implements SessionRepository
+{
+    /**
+     * @var Session[]
+     */
+    private array $existingSessions = [];
+
+    public function create(CreateSessionDto $dto): Session
+    {
+        $session = new Session(
+            token: $dto->token,
+            userId: $dto->userId,
+            createdAt: $dto->createdAt,
+            expiresAt: $dto->expiresAt,
+        );
+        $this->existingSessions[$dto->token] = $session;
+
+        return $session;
+    }
+
+    public function findByToken(string $token): ?Session
+    {
+        $session = $this->existingSessions[$token] ?? null;
+        if ($session === null) {
+            return null;
+        }
+
+        return new Session(
+            token: $session->getToken(),
+            userId: $session->getUserId(),
+            createdAt: $session->getCreatedAt(),
+            expiresAt: $session->getExpiresAt(),
+        );
+    }
+
+    public function deleteByToken(string $token): void
+    {
+        unset($this->existingSessions[$token]);
+    }
+}