如何在groovy spock中模拟Autowired构造函数依赖

Question

@Service
public class ServiceA {

private final PrincipalDao principalDao;
    @Autowired
    public ServiceA(final PrincipalDao principalDao){
        this.principalDao=principalDao;
        this.serviceMap = getMap();           
    }
            
    private Map<> getMap() {
        final List<ClassA> classAList = principalDao.findAll(); //this line returns null
       
    }       
}
    

principalDao.findAll() >> list

Answer 1

如果没有看到单元测试，很难判断问题是什么，但我有时遇到的一个常见误解是模拟的时间。

下面的示例代码详细说明了我的意思。因为您的问题中缺少部分代码，所以我将假设其中的某些部分，但我确信它解释了我所提出的观点，并希望能够帮助您找到答案：

服务类别：

@Service
public class ServiceA{

  private final PrincipalDao principalDao;
  private final Map<String, String> serviceMap;

  @Autowired
  public ServiceA(final PrincipalDao principalDao){
    this.principalDao = principalDao;
    this.serviceMap = getMap();
  }

  private Map<String, String> getMap(){
    final HashMap<String, String> stringStringHashMap = new HashMap<String, String>();
    stringStringHashMap.put("hello", principalDao.khello());
    return stringStringHashMap;
  }

  public String printServiceMap() {
    return serviceMap.get("hello");
  }
}

class ServiceATest extends Specification {

  def "some test"() {
    given:
    PrincipalDao principalDao = Mock()
    principalDao.khello() >> "khello" // this is the key here. Mocking is happening before instantiation of ServiceA
    ServiceA someService = new ServiceA(principalDao)

    expect:
    "khello" == someService.printServiceMap()
  }
}

class ServiceATest extends Specification {

  @Shared
  PrincipalDao principalDao = Mock()
  ServiceA someService = new ServiceA(principalDao)

  def setupSpec() {
    principalDao.khello() >> "khello"
  }

  def "some test"() {
    expect:
    "khello" == someService.printServiceMap()
  }
}