Spring boot 如何修复java.lang.IllegalStateException:无法清除JavaAgentClassRegister。尚未调用Set方法。？

我使用JunitRunner运行使用PowerMock和Mockito编写的单元测试

使用的是Spring启动版本

<version>2.0.5.RELEASE</version>

当我运行testcase时，我得到的错误如下所示

java.lang.IllegalStateException:无法清除JavaAgentClassRegister。尚未调用Set方法。 位于org.powermock.api.extension.agent.JavaAgentFrameworkRegisterImpl.clear（JavaAgentFrameworkRegisterImpl.java:41） 位于org.powermock.modules.junit4.rule.PowerMockStatement.clearFrameworkAgentClassRegister（PowerMockRule.java:84） 位于org.powermock.modules.junit4.rule.PowerMockStatement.evaluate（PowerMockRule.java:78） 位于org.junit.runners.ParentRunner.runLeaf（ParentRunner.java:325） 位于org.junit.runners.BlockJUnit4ClassRunner.runChild（BlockJUnit4ClassRunner.java:78） 位于org.junit.runners.BlockJUnit4ClassRunner.runChild（BlockJUnit4ClassRunner.java:57） 位于org.junit.runners.ParentRunner$3.run（ParentRunner.java:290） 位于org.junit.runners.ParentRunner$1.schedule（ParentRunner.java:71） 位于org.junit.runners.ParentRunner.runChildren（ParentRunner.java:288） 访问org.junit.runners.ParentRunner.access$000（ParentRunner.java:58） 位于org.junit.runners.ParentRunner$2.evaluate（ParentRunner.java:268） 位于org.junit.runners.ParentRunner.run（ParentRunner.java:363） 位于org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run（JUnit4TestReference.java:89） 位于org.eclipse.jdt.internal.junit.runner.TestExecution.run（TestExecution.java:41） 位于org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests（RemoteTestRunner.java:541） 位于org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests（RemoteTestRunner.java:763） 位于org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run（RemoteTestRunner.java:463） 位于org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main（RemoteTestRunner.java:209）

原因可能是什么？

---

如何做到这一点？

在JDK 8和PowerMock 2.0.2上运行测试时，我遇到了同样的问题，出现了以下一连串的异常。这只发生在JDK 8上，我尝试了JDK 9和11，它们工作得非常好。很明显这和ByteBuddy探员有关

Could not initialize plugin: interface org.mockito.plugins.MockMaker (alternate: null)
    Failed to load interface org.mockito.plugins.MockMaker implementation declared in sun.misc.CompoundEnumeration@ff7da2b
        Failed to load MockMaker implementation: mock-maker-inline
            Internal problem occurred, please report it. Mockito is unable to load the default implementation of class that is a part of Mockito distribution. Failed to load interface org.mockito.plugins.MockMaker

                Could not initialize inline Byte Buddy mock maker. (This mock maker is not supported on Android.)

                Java               : 1.8
                JVM vendor name    : Oracle Corporation
                JVM vendor version : 25.171-b11
                JVM name           : Java HotSpot(TM) 64-Bit Server VM
                JVM version        : 1.8.0_171-b11
                JVM info           : mixed mode
                OS name            : Mac OS X
                OS version         : 10.15.2
                    Error during attachment using: net.bytebuddy.agent.ByteBuddyAgent$AttachmentProvider$Compound@c746e76

您没有看到上述异常的原因是PowerMock规则的finally块抛出了一个异常，该异常掩盖了我上面显示的异常

 @Override
    public void evaluate() throws Throwable {
        Object annotationEnabler = loadAnnotationEnableIfPresent();
        try {
            injectMocksUsingAnnotationEnabler(target, annotationEnabler); //This line throws the exception I've shown above
            setFrameworkAgentClassRegister();
            fNext.evaluate();
        } finally {
            MockRepository.clear();
            clearMockFields(target, annotationEnabler);
            clearFrameworkAgentClassRegister();// This line throws another exception masking the first one
        }
    }

---

要查看上述异常，您需要远程调试运行测试的进程。在maven中，您可以使用

-Dmaven.surefire.debug

选项。

对不起，您有解决这个问题的方法吗（除了转到java 9+？）

@RunWith(JUnit4.class)
@PrepareForTest({SomeXService.class})

Could not initialize plugin: interface org.mockito.plugins.MockMaker (alternate: null)
    Failed to load interface org.mockito.plugins.MockMaker implementation declared in sun.misc.CompoundEnumeration@ff7da2b
        Failed to load MockMaker implementation: mock-maker-inline
            Internal problem occurred, please report it. Mockito is unable to load the default implementation of class that is a part of Mockito distribution. Failed to load interface org.mockito.plugins.MockMaker

                Could not initialize inline Byte Buddy mock maker. (This mock maker is not supported on Android.)

                Java               : 1.8
                JVM vendor name    : Oracle Corporation
                JVM vendor version : 25.171-b11
                JVM name           : Java HotSpot(TM) 64-Bit Server VM
                JVM version        : 1.8.0_171-b11
                JVM info           : mixed mode
                OS name            : Mac OS X
                OS version         : 10.15.2
                    Error during attachment using: net.bytebuddy.agent.ByteBuddyAgent$AttachmentProvider$Compound@c746e76

 @Override
    public void evaluate() throws Throwable {
        Object annotationEnabler = loadAnnotationEnableIfPresent();
        try {
            injectMocksUsingAnnotationEnabler(target, annotationEnabler); //This line throws the exception I've shown above
            setFrameworkAgentClassRegister();
            fNext.evaluate();
        } finally {
            MockRepository.clear();
            clearMockFields(target, annotationEnabler);
            clearFrameworkAgentClassRegister();// This line throws another exception masking the first one
        }
    }