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下面的代码是从http://junit.org/javadoc/4.9/org/junit/rules/TestWatcher.html修改的(几乎没有) 我希望看到一个通过和失败,就像在 @rule 中打印到控制台执行测试时,我什么也看不到。这让我相信我不明白这应该如何工作。如果有人可以解释为什么这不起作用,我将不胜感激。

import static org.junit.Assert.*;

import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TestWatcher;
import org.junit.runner.Description;

public class SimpleWatcher {
    private static String watchedLog;

    @Rule
    public TestWatcher watchman= new TestWatcher() {
            @Override
            protected void failed(Throwable t, Description d) {
                    watchedLog+= d + "\n";
                    System.out.println("Failed");
            }

            @Override
            protected void succeeded(Description d) {
                    watchedLog+= d + " " + "success!\n";
                    System.out.println("Pass");
            }
    };

    @Test
    public void fails() {
            fail();
    }

    @Test
    public void succeeds() {
    }
 }
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