AssertionFailedError

junit.framework.AssertionFailedError: No tests found in com.wiscom.portal.application.demo.model.BookTest
at org.junit.internal.runners.OldTestClassRunner.run(OldTestClassRunner.java:76)
at org.junit.internal.runners.CompositeRunner.run(CompositeRunner.java:29)
at org.junit.runner.JUnitCore.run(JUnitCore.java:130)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:74)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:211)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:67)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)

去新厂上班，旁边一师傅给了我一个demo，运行出现这个错误....

以前从没见过这个错..intellij idea也是第一次用，半天都不知道哪个文件出的错...

错误代码如下

public class BookTest extends junit.framework.TestCase {
}

这个test是空的，日了狗...