如何模拟在方法内部创建的对象? [英] How to mock objects created inside method?

问题描述

考虑这个

public class UserManager {
    private final CrudService crudService;

    @Inject
    public UserManager(@Nonnull final CrudService crudService) {
        this.crudService = crudService;
    }

    @Nonnull
    public List<UserPresentation> getUsersByState(@Nonnull final String state) {
        return UserPresentation.getUserPresentations(new UserQueries(crudService).getUserByState(state));
    }

}

我要模拟

new UserQueries(crudService)  

以便我可以模拟其行为

有什么想法吗?

推荐答案

使用 PowerMock 可以模拟构造函数.请参见示例

With PowerMock you can mock constructors. See example

我现在没有使用IDE，但是会是这样的:

I'm not with an IDE right now, but would be something like this:

  UserQueries userQueries = PowerMockito.mock(UserQueries.class);
  PowerMockito.whenNew(UserQueries.class).withArguments(Mockito.any(CrudService.class)).thenReturn(userQueries);

您需要使用PowerMockRunner运行测试(将这些注释添加到测试类中):

You need to run your test with PowerMockRunner (add these annotations to your test class):

@RunWith(PowerMockRunner.class)
@PrepareForTest(UserQueries .class)

如果您不能使用PowerMock，则必须注入一个工厂，因为它显示@Briggo答案.

If you cannot use PowerMock, you have to inject a factory, as it says @Briggo answer.

希望有帮助

这篇关于如何模拟在方法内部创建的对象?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！