Rabbi_Gerzi/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 PHPUnit\Framework\TestCase;
use Tests\Fakes\FakePasswordHasher;
use Tests\Fakes\FakeUserRepository;

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,
        );

        $this->userRepo->create(new CreateUserDto(
            email: new EmailAddress('user@example.com'),
            passwordHash: $this->hasher->hash('correct-password'),
        ));
    }

    public function testAuthenticatesWithValidCredentials(): void
    {
        $user = $this->useCase->execute(new AuthenticateUserRequest(
            email: 'user@example.com',
            password: 'correct-password',
        ));

        $this->assertSame('user@example.com', $user->getEmail()->value());
    }

    public function testThrowsBadRequestWhenEmailIsEmpty(): void
    {
        $this->expectException(BadRequestException::class);
        $this->expectExceptionMessage('email is required');

        $this->useCase->execute(new AuthenticateUserRequest(
            email: '',
            password: 'some-password',
        ));
    }

    public function testThrowsBadRequestWhenPasswordIsEmpty(): void
    {
        $this->expectException(BadRequestException::class);
        $this->expectExceptionMessage('password is required');

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

    public function testThrowsBadRequestWhenEmailIsNull(): void
    {
        $this->expectException(BadRequestException::class);
        $this->expectExceptionMessage('email is required');

        $this->useCase->execute(new AuthenticateUserRequest(
            email: null,
            password: 'some-password',
        ));
    }

    public function testThrowsBadRequestWhenPasswordIsNull(): void
    {
        $this->expectException(BadRequestException::class);
        $this->expectExceptionMessage('password is required');

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

    public function testThrowsUnauthorizedForUnknownEmail(): void
    {
        $this->expectException(UnauthorizedException::class);
        $this->expectExceptionMessage('invalid credentials');

        $this->useCase->execute(new AuthenticateUserRequest(
            email: 'unknown@example.com',
            password: 'some-password',
        ));
    }

    public function testThrowsUnauthorizedForWrongPassword(): void
    {
        $this->expectException(UnauthorizedException::class);
        $this->expectExceptionMessage('invalid credentials');

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

    public function testReturnsNewInstanceOnEachCall(): void
    {
        $user1 = $this->useCase->execute(new AuthenticateUserRequest(
            email: 'user@example.com',
            password: 'correct-password',
        ));

        $user2 = $this->useCase->execute(new AuthenticateUserRequest(
            email: 'user@example.com',
            password: 'correct-password',
        ));

        $this->assertNotSame($user1, $user2);
    }
}