如何使用 JMockit 模拟 Thread.sleep()？

发布于 2024-11-30 01:58:59 字数 360 浏览 4 评论 0原文

我有以下代码：

class Sleeper {
    public void sleep(long duration) {
        try {
            Thread.sleep(duration);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }
    }
}

如何使用 JMockit 测试 Thread.currentThread().interrupt() 在 Thread.sleep() 抛出 InterruptedException 时被调用？

原文

I have the following code:

class Sleeper {
    public void sleep(long duration) {
        try {
            Thread.sleep(duration);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }
    }
}

How do I test, with JMockit, that Thread.currentThread().interrupt() is called if Thread.sleep() throws an InterruptedException?

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狠疯拽 2024-12-07 01:58:59

有趣的问题。测试有点棘手，因为模拟 java.lang.Thread 的某些方法可能会干扰 JRE 或 JMockit 本身，而且 JMockit（当前）无法动态模拟本机方法，例如 sleep。也就是说，仍然可以做到：

public void testResetInterruptStatusWhenInterrupted() throws Exception
{
    new Expectations() {
       @Mocked({"sleep", "interrupt"}) final Thread unused = null;

       {
           Thread.sleep(anyLong); result = new InterruptedException();
           onInstance(Thread.currentThread()).interrupt();
       }
    };

    new Sleeper.sleep();
}

Interesting question. A bit tricky to test because mocking certain methods of java.lang.Thread can interfere with the JRE or with JMockit itself, and because JMockit is (currently) unable to dynamically mock native methods such as sleep. That said, it can still be done:

public void testResetInterruptStatusWhenInterrupted() throws Exception
{
    new Expectations() {
       @Mocked({"sleep", "interrupt"}) final Thread unused = null;

       {
           Thread.sleep(anyLong); result = new InterruptedException();
           onInstance(Thread.currentThread()).interrupt();
       }
    };

    new Sleeper.sleep();
}

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