JMockit - 意外调用

Question

我有一个使用 JMockit 进行单元测试的简单实现。实现如下Team班级public class Team {    private TeamLeader teamLeader;    public Team(TeamLeader teamleader) {        this.teamLeader = teamleader;    }    public boolean hasDiscussion() {        System.out.println("Discussion is hold by " + teamLeader.getName());        Discussion discussion = new Discussion();        return discussion.start();    }}TeamLeader班级public class TeamLeader {    private String name;    public TeamLeader(String name) {        this.name = name;    }    public String getName() {        return name;    }}Discussion班级public class Discussion {    public boolean start() {        return false;    }}然后，我有一个单元测试来测试功能hasDiscussion如下@RunWith(JMockit.class)public class TeamTest {    private Team team;    @Test    public void hasDiscussion(@Mocked TeamLeader teamLeader, @Mocked Discussion discussion) {        new Expectations() {{            teamLeader.getName(); result = "teamleader";            discussion.start(); result = true;        }};        team = new Team(teamLeader);        boolean actualResult = team.hasDiscussion();        new Verifications() {{            assertThat(actualResult, is(true));        }};    }}执行测试时，出现以下错误Unexpected invocation of:entity.Discussion#Discussion()   on instance: entity.Discussion@7b70deb2when was expecting an invocation of:entity.Discussion#start()   on mock instance: [e-mail]: Unexpected invocation of:entity.Discussion#Discussion()   on instance: entity.Discussion@7b70deb2when was expecting an invocation of:对这类问题有什么想法吗？

Answer 1

发生这种情况是因为您的hasDiscussion方法正在创建类的新实例Discussion，在这种情况下，您不能模拟它。要解决这个问题，您可以接收Discuss类作为方法的参数并发送模拟，我们在Team类构造函数中注入 Discuss 类。