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

<?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 Tests\Fakes\FakePasswordHasher;
use Tests\Fakes\FakeUserRepository;
use Tests\TestCase;

class AuthenticateUserTest extends TestCase
{
    private FakeUserRepository $userRepo;

    private FakePasswordHasher $hasher;

    private AuthenticateUser $useCase;

    protected function setUp(): void
    {
        $this->userRepo = new FakeUserRepository;
        $this->hasher = new FakePasswordHasher;
        $this->useCase = new AuthenticateUser(
            $this->userRepo,
            $this->hasher,
        );
    }

    private function seedUser(
        string $email,
        string $password,
        bool $isAdmin,
    ): User {
        return $this->userRepo->create(new CreateUserDto(
            email: new EmailAddress($email),
            passwordHash: $this->hasher->hash($password),
            isAdmin: $isAdmin,
        ));
    }

    public function test_null_email_throws_bad_request(): void
    {
        $this->expectException(BadRequestException::class);
        $this->useCase->execute(new AuthenticateUserRequest(
            email: null,
            password: 'correctpassword',
        ));
    }

    public function test_empty_email_throws_bad_request(): void
    {
        $this->expectException(BadRequestException::class);
        $this->useCase->execute(new AuthenticateUserRequest(
            email: '',
            password: 'correctpassword',
        ));
    }

    public function test_null_password_throws_bad_request(): void
    {
        $this->expectException(BadRequestException::class);
        $this->useCase->execute(new AuthenticateUserRequest(
            email: 'user@example.com',
            password: null,
        ));
    }

    public function test_empty_password_throws_bad_request(): void
    {
        $this->expectException(BadRequestException::class);
        $this->useCase->execute(new AuthenticateUserRequest(
            email: 'user@example.com',
            password: '',
        ));
    }

    public function test_malformed_email_throws_bad_request(): void
    {
        $this->expectException(BadRequestException::class);
        $this->useCase->execute(new AuthenticateUserRequest(
            email: 'not-an-email',
            password: 'correctpassword',
        ));
    }

    public function test_unknown_email_throws_unauthorized(): void
    {
        $this->expectException(UnauthorizedException::class);
        $this->useCase->execute(new AuthenticateUserRequest(
            email: 'nobody@example.com',
            password: 'correctpassword',
        ));
    }

    public function test_wrong_password_throws_unauthorized(): void
    {
        $this->seedUser(
            email: 'user@example.com',
            password: 'correctpassword',
            isAdmin: false,
        );

        $this->expectException(UnauthorizedException::class);
        $this->useCase->execute(new AuthenticateUserRequest(
            email: 'user@example.com',
            password: 'wrongpassword',
        ));
    }

    public function test_valid_credentials_return_user(): void
    {
        $seeded = $this->seedUser(
            email: 'user@example.com',
            password: 'correctpassword',
            isAdmin: false,
        );

        $authenticated = $this->useCase->execute(
            new AuthenticateUserRequest(
                email: 'user@example.com',
                password: 'correctpassword',
            )
        );

        $this->assertInstanceOf(User::class, $authenticated);
        $this->assertSame($seeded->getId(), $authenticated->getId());
        $this->assertSame(
            'user@example.com',
            $authenticated->getEmail()->value(),
        );
        $this->assertFalse($authenticated->isAdmin());
    }

    public function test_admin_flag_is_preserved_on_authentication(): void
    {
        $this->seedUser(
            email: 'admin@example.com',
            password: 'adminpassword',
            isAdmin: true,
        );

        $authenticated = $this->useCase->execute(
            new AuthenticateUserRequest(
                email: 'admin@example.com',
                password: 'adminpassword',
            )
        );

        $this->assertTrue($authenticated->isAdmin());
    }
}