test auth contracts

backend/tests/Unit/Auth/UseCases/AuthenticateUserTest.php

@@ -0,0 +1,104 @@
+<?php
+
+namespace Tests\Unit\Auth\UseCases;
+
+use App\Auth\UseCases\AuthenticateUser\AuthenticateUser;
+use App\Auth\UseCases\AuthenticateUser\AuthenticateUserRequest;
+use App\Exceptions\BadRequestException;
+use App\Exceptions\UnauthorizedException;
+use App\Shared\ValueObject\EmailAddress;
+use App\User\CreateUserDto;
+use App\User\User;
+use PHPUnit\Framework\TestCase;
+use Tests\Fakes\FakePasswordHasher;
+use Tests\Fakes\FakeUserRepository;
+
+class AuthenticateUserTest extends TestCase
+{
+    private FakeUserRepository $userRepository;
+
+    private FakePasswordHasher $passwordHasher;
+
+    private AuthenticateUser $useCase;
+
+    protected function setUp(): void
+    {
+        $this->userRepository = new FakeUserRepository;
+        $this->passwordHasher = new FakePasswordHasher;
+        $this->useCase = new AuthenticateUser(
+            $this->userRepository,
+            $this->passwordHasher,
+        );
+    }
+
+    public function test_null_email_throws_bad_request(): void
+    {
+        $this->expectException(BadRequestException::class);
+        $this->expectExceptionMessage('email is required');
+
+        $this->useCase->execute(new AuthenticateUserRequest(
+            email: null,
+            password: 'correct-password',
+        ));
+    }
+
+    public function test_null_password_throws_bad_request(): void
+    {
+        $this->expectException(BadRequestException::class);
+        $this->expectExceptionMessage('password is required');
+
+        $this->useCase->execute(new AuthenticateUserRequest(
+            email: 'user@example.com',
+            password: null,
+        ));
+    }
+
+    public function test_unknown_email_throws_unauthorized(): void
+    {
+        $this->expectException(UnauthorizedException::class);
+        $this->expectExceptionMessage('invalid credentials');
+
+        $this->useCase->execute(new AuthenticateUserRequest(
+            email: 'unknown@example.com',
+            password: 'correct-password',
+        ));
+    }
+
+    public function test_wrong_password_throws_unauthorized(): void
+    {
+        $this->createUser('correct-password');
+        $this->expectException(UnauthorizedException::class);
+        $this->expectExceptionMessage('invalid credentials');
+
+        $this->useCase->execute(new AuthenticateUserRequest(
+            email: 'user@example.com',
+            password: 'wrong-password',
+        ));
+    }
+
+    public function test_valid_credentials_return_user(): void
+    {
+        $user = $this->createUser('correct-password');
+
+        $authenticatedUser = $this->useCase->execute(
+            new AuthenticateUserRequest(
+                email: 'user@example.com',
+                password: 'correct-password',
+            ),
+        );
+
+        $this->assertSame($user->getId(), $authenticatedUser->getId());
+        $this->assertSame(
+            $user->getEmail()->value(),
+            $authenticatedUser->getEmail()->value(),
+        );
+    }
+
+    private function createUser(string $password): User
+    {
+        return $this->userRepository->create(new CreateUserDto(
+            email: new EmailAddress('user@example.com'),
+            passwordHash: $this->passwordHasher->hash($password),
+        ));
+    }
+}