test user persistence

backend/tests/Unit/User/UserTest.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace Tests\Unit\User;
+
+use App\Shared\ValueObject\EmailAddress;
+use App\User\User;
+use PHPUnit\Framework\TestCase;
+
+class UserTest extends TestCase
+{
+    public function test_it_exposes_its_identity_and_email(): void
+    {
+        $email = new EmailAddress('user@example.com');
+        $user = new User(id: 42, email: $email);
+
+        $this->assertSame(42, $user->getId());
+        $this->assertSame($email, $user->getEmail());
+    }
+}