java.lang.IllegalStateException：无法将类转换为...原因：修改方法时PowerMock内部错误。

Question

我正在运行一个过去曾经工作过的单元测试，并突然发现这个新错误刚刚开始显示。这似乎是PowerMock的一个问题？任何想法这里有什么？

我的项目依赖于使用Ivy解决的许多其他项目。这里是发生了什么的日志消息：

java.lang.IllegalStateException: Failed to transform class with name com.test.MyTestClass. Reason: PowerMock internal error when modifying method. 
    at org.powermock.core.classloader.MockClassLoader.loadMockClass(MockClassLoader.java:207) 
    at org.powermock.core.classloader.MockClassLoader.loadModifiedClass(MockClassLoader.java:145) 
    at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass(DeferSupportingClassLoader.java:67) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358) 
    at java.lang.ClassLoader.defineClass1(Native Method) 
    at java.lang.ClassLoader.defineClass(ClassLoader.java:800) 
    at java.lang.ClassLoader.defineClass(ClassLoader.java:643) 
    at org.powermock.core.classloader.MockClassLoader.loadMockClass(MockClassLoader.java:210) 
    at org.powermock.core.classloader.MockClassLoader.loadModifiedClass(MockClassLoader.java:145) 
    at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass(DeferSupportingClassLoader.java:67) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358) 
    at java.lang.Class.forName0(Native Method) 
    at java.lang.Class.forName(Class.java:270) 
    at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.createDelegatorFromClassloader(JUnit4TestSuiteChunkerImpl.java:133) 
    at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.createDelegatorFromClassloader(JUnit4TestSuiteChunkerImpl.java:39) 
    at org.powermock.tests.utils.impl.AbstractTestSuiteChunkerImpl.createTestDelegators(AbstractTestSuiteChunkerImpl.java:217) 
    at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.<init>(JUnit4TestSuiteChunkerImpl.java:59) 
    at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.<init>(AbstractCommonPowerMockRunner.java:32) 
    at org.powermock.modules.junit4.PowerMockRunner.<init>(PowerMockRunner.java:31) 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) 
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 
    at java.lang.reflect.Constructor.newInstance(Constructor.java:526) 
    at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:29) 
    at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:21) 
    at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59) 
    at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26) 
    at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59) 
    at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:26) 
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.<init>(JUnit4TestReference.java:33) 
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestClassReference.<init>(JUnit4TestClassReference.java:25) 
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:48) 
    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) 
Caused by: java.lang.RuntimeException: PowerMock internal error when modifying method. 
    at org.powermock.core.transformers.impl.MainMockTransformer$PowerMockExpressionEditor.edit(MainMockTransformer.java:304) 
    at javassist.expr.ExprEditor.loopBody(ExprEditor.java:192) 
    at javassist.expr.ExprEditor.doit(ExprEditor.java:91) 
    at javassist.CtClassType.instrument(CtClassType.java:1385) 
    at org.powermock.core.transformers.impl.MainMockTransformer.transform(MainMockTransformer.java:75) 
    at org.powermock.core.classloader.MockClassLoader.loadMockClass(MockClassLoader.java:203) 
    ... 36 more 
Caused by: javassist.NotFoundException: mockStatic(..) is not found in org.powermock.api.mockito.PowerMockito 
    at javassist.CtClassType.getMethod(CtClassType.java:1130) 
    at javassist.expr.MethodCall.getMethod(MethodCall.java:115) 
    at org.powermock.core.transformers.impl.MainMockTransformer$PowerMockExpressionEditor.edit(MainMockTransformer.java:283) 
    ... 41 more 

Answer 1

对于我来说，这竟然是与PowerMock的版本的版本冲突正在使用的项目我的主要项目依赖。

即有两个版本的PowerMock正在使用 - 一个依赖项目较旧的版本，以及一个由我的主项目更新的版本。

要解决它，我只需要更新我的其他项目使用的PowerMock版本。

例：在我的ivy.xml，我在我的PowerMock版更新到1.5.4，它似乎来解决这个问题：

<dependency org="org.powermock" name="powermock-core" rev="1.5.4" conf="master->default" /> 
<dependency org="org.powermock" name="powermock-api-mockito" rev="1.5.4" conf="master->default" /> 
<dependency org="org.powermock" name="powermock-module-junit4" rev="1.5.4" conf="master->default" />