Question

我试图模仿一个名为cat: no such file or directory.的协作者并捕获其方法Worker的参数，该参数在不同的线程中运行。但是，该方法本身具有方法引用作为参数：execute和childService::listClients。当我使用捕获的参数断言方法引用时，我得到不同的lambda对象。

有没有办法以正确的方式触及和断言？

正在测试的课程：

childService::refreshObjects

测试：

public class ParentService {
    private ChildService childService;
    private Worker worker;
    ...
    public void doAction() {
        worker.execute(
                childService::listClients,
                childService::refreshObjects
        );
    }
}

断言错误：

@Test
public void shouldUseChildService() {
    ArgumentCaptor<Callable> callableCaptor = ArgumentCaptor.forClass(Callable.class);
    ArgumentCaptor<Consumer> consumerCaptor = ArgumentCaptor.forClass(Consumer.class);

    parentService.doAction();

    verify(worker).execute(callableCaptor.capture(), consumerCaptor.capture());
    assertEquals((Callable) childService::listClients, callableCaptor.getValue());
    assertEquals((Consumer) childService::refreshObjects, consumerCaptor.getValue());
}

Answer 1

首先用Mockito模拟你的Worker（就像你一样）。同时嘲笑你的ChildService。然后：

@Test
public void shouldUseChildService() {
  ArgumentCaptor<Callable> callableCaptor = ArgumentCaptor.forClass(Callable.class);
  ArgumentCaptor<Consumer> consumerCaptor = ArgumentCaptor.forClass(Consumer.class);

  parentService.doAction();

  verify(worker).execute(callableCaptor.capture(), consumerCaptor.capture());
  callableCaptor.getValue().call(); //this will execute whatever was captured
  consumerCaptor.getValue().accept(null);//this will execute whatever was captured

  // now verify that childService::listClients and childService::refreshObjects have been called
}

使用mockito捕获方法引用

1 个答案: