PHP 単体テストと依存関係注入がどのように連携するか

class UserService
{
    private $userRepository;

    public function __construct(UserRepository $userRepository)
    {
        $this->userRepository = $userRepository;
    }

    public function createUser(array $data)
    {
        // ... 创建用户
    }
}

class UserRepository
{
    public function find($id)
    {
        // ... 查找用户
    }
}

class UserServiceTest extends TestCase
{
    public function testCreateUser()
    {
        $userRepository = $this->createMock(UserRepository::class); // 模拟依赖项
        $userRepository->expects($this->once())
            ->method('find')
            ->with('123'); // 期望的依赖项调用

        $userService = new UserService($userRepository);
        $userService->createUser(['name' => 'John Doe']);

        $this->assertTrue(true); // 断言测试通过
    }
}