From 8cbc84b051a47de71b009cc955ccb625bb92c222 Mon Sep 17 00:00:00 2001
From: Yisroel Baum <yisroel.d.baum@gmail.com>
Date: Wed, 6 May 2026 22:34:29 +0300
Subject: [PATCH] test PromoteUserToAdmin use case

---
 .../User/UseCases/PromoteUserToAdminTest.php  | 94 +++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 backend/tests/Unit/User/UseCases/PromoteUserToAdminTest.php

diff --git a/backend/tests/Unit/User/UseCases/PromoteUserToAdminTest.php b/backend/tests/Unit/User/UseCases/PromoteUserToAdminTest.php
new file mode 100644
index 0000000..0ee5d46
--- /dev/null
+++ b/backend/tests/Unit/User/UseCases/PromoteUserToAdminTest.php
@@ -0,0 +1,94 @@
+<?php
+
+namespace Tests\Unit\User\UseCases;
+
+use App\Exceptions\BadRequestException;
+use App\Exceptions\ForbiddenException;
+use App\Shared\ValueObject\EmailAddress;
+use App\User\CreateUserDto;
+use App\User\UseCases\PromoteUserToAdmin\PromoteUserToAdmin;
+use App\User\UseCases\PromoteUserToAdmin\PromoteUserToAdminRequest;
+use DomainException;
+use Tests\Fakes\FakeUserRepository;
+use Tests\TestCase;
+
+class PromoteUserToAdminTest extends TestCase
+{
+    private FakeUserRepository $userRepo;
+
+    private PromoteUserToAdmin $useCase;
+
+    protected function setUp(): void
+    {
+        $this->userRepo = new FakeUserRepository;
+        $this->useCase = new PromoteUserToAdmin($this->userRepo);
+    }
+
+    private function seedUser(bool $isAdmin): int
+    {
+        $user = $this->userRepo->create(new CreateUserDto(
+            email: new EmailAddress('user@example.com'),
+            displayName: 'user',
+            passwordHash: 'h',
+            isAdmin: $isAdmin,
+            emailConfirmedAt: null,
+        ));
+
+        return $user->getId();
+    }
+
+    public function test_non_admin_requester_throws_forbidden(): void
+    {
+        $userId = $this->seedUser(false);
+
+        $this->expectException(ForbiddenException::class);
+        $this->useCase->execute(new PromoteUserToAdminRequest(
+            targetUserId: $userId,
+            requesterIsAdmin: false,
+        ));
+    }
+
+    public function test_zero_target_id_throws_bad_request(): void
+    {
+        $this->expectException(BadRequestException::class);
+        $this->useCase->execute(new PromoteUserToAdminRequest(
+            targetUserId: 0,
+            requesterIsAdmin: true,
+        ));
+    }
+
+    public function test_unknown_user_throws_domain_exception(): void
+    {
+        $this->expectException(DomainException::class);
+        $this->useCase->execute(new PromoteUserToAdminRequest(
+            targetUserId: 999,
+            requesterIsAdmin: true,
+        ));
+    }
+
+    public function test_admin_promotes_target(): void
+    {
+        $userId = $this->seedUser(false);
+
+        $this->useCase->execute(new PromoteUserToAdminRequest(
+            targetUserId: $userId,
+            requesterIsAdmin: true,
+        ));
+
+        $reloaded = $this->userRepo->find($userId);
+        $this->assertTrue($reloaded->isAdmin());
+    }
+
+    public function test_already_admin_is_idempotent(): void
+    {
+        $userId = $this->seedUser(true);
+
+        $this->useCase->execute(new PromoteUserToAdminRequest(
+            targetUserId: $userId,
+            requesterIsAdmin: true,
+        ));
+
+        $reloaded = $this->userRepo->find($userId);
+        $this->assertTrue($reloaded->isAdmin());
+    }
+}