Mockito-注入模拟列表

Question

我有以下代码：

@Component 
public class Wrapper
{ 
    @Resource 
    private List<Strategy> strategies;

    public String getName(String id)
    {
    // the revelant part of this statement is that I would like to iterate over "strategies"
        return strategies.stream()
            .filter(strategy -> strategy.isApplicable(id))
            .findFirst().get().getAmount(id);
    } 
}

@Component 
public class StrategyA implements Strategy{...}

@Component 
public class StrategyB implements Strategy{...}

我想使用Mockito创建一个测试。我编写了如下测试：

@InjectMocks
private Wrapper testedObject = new Wrapper ();

// I was hoping that this list will contain both strategies: strategyA and strategyB
@Mock
private List<Strategy> strategies;

@Mock
StrategyA strategyA;

@Mock
StrategyB strategyB;

@Test
public void shouldReturnNameForGivenId()
{   // irrevelant code...
    //when
    testedObject.getName(ID);
}

我在网上收到NullPointerException：

filter(strategy -> strategy.isApplicable(id))

，它表示“策略”列表已初始化，但为空。Mohito有什么办法可以像Spring一样浪费时间？是否将所有实现接口“策略”的实例自动添加到列表中？

顺便说一句，我在Wrapper类中没有任何二传手，如果可能的话，我想以这种方式离开。

Answer 1

Mockito不知道您想在清单 策略中 放些东西。

您应该重新考虑这样做

@InjectMocks
private Wrapper testedObject = new Wrapper ();

private List<Strategy> mockedStrategies;

@Mock
StrategyA strategyA;

@Mock
StrategyB strategyB;

@Before
public void setup() throws Exception {
    mockedStrategies = Arrays.asList(strategyA, strategyB);
    wrapper.setStrategies(mockedStrategies);
}