問題的情況如上。
問題的解決方法居然是：選中函數的整行，而不是只選中函數名，如下圖選中運行junit測試。
TestMySQL.testDriverMannager1
Unrooted Tests
initializationError(org.junit.runner.manipulation.Filter)
java.lang.Exception: No tests found matching Method testDriverMannager1(TestMySQL.TestMySQL) from org.junit.internal.requests.ClassRequest@77b3cedc
at org.junit.internal.requests.FilterRequest.getRunner(FilterRequest.java:35)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.<init>(JUnit4TestReference.java:33)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestMethodReference.<init>(JUnit4TestMethodReference.java:25)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:54)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:452)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)