我正在使用 JAVA 1.8，Javaassist 版本为 3.24.0，power mock 1.7.4。当我在@PrepareForTest 中包含一个类时，我遇到了这个问题。这里 MainClass 类取决于 serverCommunicator.class 实例。
public class MainClass
{
public void sendInitRequest()
{
ServerCommunicator communicator = ServerCommunicator.getInstance();
communicator.init();
}
}
public class ServerCommunicator
{
private static communicator ;
public static ServerCommunicator getInstance()
{
return communicator;
}
public void init()
{
System.out.println("Communication has initialized ");
}
}
我写的上述方法的测试用例是这样的：
@PowerMockIgnore("javax.management.*")
@RunWith(PowerMockRunner.class)
@PrepareForTest({ ServerCommunicator.class }
@Test
public void testSendInitRequest() throws NullPointerException
{
try
{
MainClass mainClass = new MainClass();
final ServerCommunicator communicator = PowerMockito.mock(new ServerCommunicator());
PowerMockito.mockStatic(ServerCommunicator.class);
when(ServerCommunicator.getInstance()).thenReturn(communicator);
PowerMockito.doNothing().when(communicator).init();
mainClass.sendInitRequest();
assertTrue(true);
}
catch (Throwable t)
{
assertTrue(1 == 0);
}
}
因此，当我在 @PrepareForTest 中添加 serverCommunicator.class 时，它会在线程“main”java.lang.IllegalStateException 中显示以下错误。异常：无法转换名称为 ServerCommunicator 的类。原因：空
FAILED CONFIGURATION: @BeforeClass beforePowerMockTestClass
java.lang.NullPointerException
at javassist.bytecode.stackmap.Tracer.checkParamTypes(Tracer.java:899)
at javassist.bytecode.stackmap.Tracer.doInvokeMethod(Tracer.java:798)
at javassist.bytecode.stackmap.Tracer.doOpcode148_201(Tracer.java:592)
at javassist.bytecode.stackmap.Tracer.doOpcode(Tracer.java:78)
at javassist.bytecode.stackmap.MapMaker.make(MapMaker.java:195)
at javassist.bytecode.stackmap.MapMaker.make(MapMaker.java:207)
at javassist.bytecode.stackmap.MapMaker.make(MapMaker.java:207)
at javassist.bytecode.stackmap.MapMaker.make(MapMaker.java:207)
at javassist.bytecode.stackmap.MapMaker.make(MapMaker.java:172)
at javassist.bytecode.stackmap.MapMaker.make(MapMaker.java:116)
at javassist.bytecode.MethodInfo.rebuildStackMap(MethodInfo.java:458)
at javassist.bytecode.MethodInfo.rebuildStackMapIf6(MethodInfo.java:440)
at javassist.expr.ExprEditor.doit(ExprEditor.java:118)
at javassist.CtClassType.instrument(CtClassType.java:1541)
at org.powermock.core.transformers.javassist.InstrumentMockTransformer.transform(InstrumentMockTransformer.java:41)
at org.powermock.core.transformers.javassist.AbstractJavaAssistMockTransformer.transform(AbstractJavaAssistMockTransformer.java:40)
at org.powermock.core.transformers.support.DefaultMockTransformerChain.transform(DefaultMockTransformerChain.java:43)
at org.powermock.core.classloader.MockClassLoader.transformClass(MockClassLoader.java:184)
at org.powermock.core.classloader.javassist.JavassistMockClassLoader.defineAndTransformClass(JavassistMockClassLoader.java:102)
at org.powermock.core.classloader.MockClassLoader.loadMockClass(MockClassLoader.java:174)
at org.powermock.core.classloader.MockClassLoader.loadClassByThisClassLoader(MockClassLoader.java:102)
at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass1(DeferSupportingClassLoader.java:147)
at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass(DeferSupportingClassLoader.java:98)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at sun.reflect.generics.factory.CoreReflectionFactory.makeNamedType(Unknown Source)
at sun.reflect.generics.visitor.Reifier.visitClassTypeSignature(Unknown Source)
at sun.reflect.generics.tree.ClassTypeSignature.accept(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseSig(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseClassValue(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseClassArray(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseArray(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseMemberValue(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseAnnotation2(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseAnnotations2(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseAnnotations(Unknown Source)
at java.lang.Class.createAnnotationData(Unknown Source)
at java.lang.Class.annotationData(Unknown Source)
at java.lang.Class.getAnnotation(Unknown Source)
at org.testng.internal.annotations.JDK15AnnotationFinder.findAnnotationInSuperClasses(JDK15AnnotationFinder.java:88)
at org.testng.internal.annotations.JDK15AnnotationFinder.findAnnotation(JDK15AnnotationFinder.java:177)
at org.testng.internal.annotations.AnnotationHelper.findTest(AnnotationHelper.java:32)
at org.testng.internal.MethodHelper.isEnabled(MethodHelper.java:158)
at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:186)
at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:138)
at org.testng.internal.TestMethodWorker.invokeBeforeClassMethods(TestMethodWorker.java:170)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:104)
at org.testng.TestRunner.privateRun(TestRunner.java:774)
at org.testng.TestRunner.run(TestRunner.java:624)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:359)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:354)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:312)
at org.testng.SuiteRunner.run(SuiteRunner.java:261)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1215)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1140)
at org.testng.TestNG.run(TestNG.java:1048)
at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:115)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)
FAILED CONFIGURATION: @AfterClass afterPowerMockTestClass
java.lang.NullPointerException
at javassist.expr.MethodCall.getClassName(MethodCall.java:110)
at javassist.expr.MethodCall.getCtClass(MethodCall.java:90)
at javassist.expr.MethodCall.getMethod(MethodCall.java:129)
at org.powermock.core.transformers.javassist.support.PowerMockExpressionEditor.edit(PowerMockExpressionEditor.java:79)
at javassist.expr.ExprEditor.loopBody(ExprEditor.java:197)
at javassist.expr.ExprEditor.doit(ExprEditor.java:96)
at javassist.CtClassType.instrument(CtClassType.java:1541)
at org.powermock.core.transformers.javassist.InstrumentMockTransformer.transform(InstrumentMockTransformer.java:41)
at org.powermock.core.transformers.javassist.AbstractJavaAssistMockTransformer.transform(AbstractJavaAssistMockTransformer.java:40)
at org.powermock.core.transformers.support.DefaultMockTransformerChain.transform(DefaultMockTransformerChain.java:43)
at org.powermock.core.classloader.MockClassLoader.transformClass(MockClassLoader.java:184)
at org.powermock.core.classloader.javassist.JavassistMockClassLoader.defineAndTransformClass(JavassistMockClassLoader.java:102)
at org.powermock.core.classloader.MockClassLoader.loadMockClass(MockClassLoader.java:174)
at org.powermock.core.classloader.MockClassLoader.loadClassByThisClassLoader(MockClassLoader.java:102)
at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass1(DeferSupportingClassLoader.java:147)
at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass(DeferSupportingClassLoader.java:98)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at sun.reflect.generics.factory.CoreReflectionFactory.makeNamedType(Unknown Source)
at sun.reflect.generics.visitor.Reifier.visitClassTypeSignature(Unknown Source)
at sun.reflect.generics.tree.ClassTypeSignature.accept(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseSig(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseClassValue(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseClassArray(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseArray(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseMemberValue(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseAnnotation2(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseAnnotations2(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseAnnotations(Unknown Source)
at java.lang.Class.createAnnotationData(Unknown Source)
at java.lang.Class.annotationData(Unknown Source)
at java.lang.Class.getAnnotation(Unknown Source)
at org.testng.internal.annotations.JDK15AnnotationFinder.findAnnotationInSuperClasses(JDK15AnnotationFinder.java:88)
at org.testng.internal.annotations.JDK15AnnotationFinder.findAnnotation(JDK15AnnotationFinder.java:177)
at org.testng.internal.annotations.AnnotationHelper.findTest(AnnotationHelper.java:32)
at org.testng.internal.MethodHelper.isEnabled(MethodHelper.java:158)
at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:186)
at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:138)
at org.testng.internal.TestMethodWorker.invokeAfterClassMethods(TestMethodWorker.java:220)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
at org.testng.TestRunner.privateRun(TestRunner.java:774)
at org.testng.TestRunner.run(TestRunner.java:624)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:359)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:354)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:312)
at org.testng.SuiteRunner.run(SuiteRunner.java:261)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1215)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1140)
at org.testng.TestNG.run(TestNG.java:1048)
at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:115)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)
java.lang.IllegalStateException: Failed to transform class with name ServerCommunicator. Reason: null
at org.powermock.core.classloader.javassist.JavassistMockClassLoader.defineAndTransformClass(JavassistMockClassLoader.java:119)
at org.powermock.core.classloader.MockClassLoader.loadMockClass(MockClassLoader.java:174)
at org.powermock.core.classloader.MockClassLoader.loadClassByThisClassLoader(MockClassLoader.java:102)
at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass1(DeferSupportingClassLoader.java:147)
at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass(DeferSupportingClassLoader.java:98)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at sun.reflect.generics.factory.CoreReflectionFactory.makeNamedType(Unknown Source)
at sun.reflect.generics.visitor.Reifier.visitClassTypeSignature(Unknown Source)
at sun.reflect.generics.tree.ClassTypeSignature.accept(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseSig(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseClassValue(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseClassArray(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseArray(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseMemberValue(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseAnnotation2(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseAnnotations2(Unknown Source)
at sun.reflect.annotation.AnnotationParser.parseAnnotations(Unknown Source)
at java.lang.Class.createAnnotationData(Unknown Source)
at java.lang.Class.annotationData(Unknown Source)
at java.lang.Class.getAnnotation(Unknown Source)
at org.testng.internal.annotations.JDK15AnnotationFinder.findAnnotation(JDK15AnnotationFinder.java:128)
at org.testng.internal.ExpectedExceptionsHolder.findExpectedClasses(ExpectedExceptionsHolder.java:28)
at org.testng.internal.ExpectedExceptionsHolder.<init>(ExpectedExceptionsHolder.java:22)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1055)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:125)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:108)
at org.testng.TestRunner.privateRun(TestRunner.java:774)
at org.testng.TestRunner.run(TestRunner.java:624)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:359)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:354)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:312)
at org.testng.SuiteRunner.run(SuiteRunner.java:261)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1215)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1140)
at org.testng.TestNG.run(TestNG.java:1048)
at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:115)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)
Caused by: java.lang.NullPointerException
at javassist.expr.MethodCall.getClassName(MethodCall.java:110)
at javassist.expr.MethodCall.getCtClass(MethodCall.java:90)
at javassist.expr.MethodCall.getMethod(MethodCall.java:129)
at org.powermock.core.transformers.javassist.support.PowerMockExpressionEditor.edit(PowerMockExpressionEditor.java:79)
at javassist.expr.ExprEditor.loopBody(ExprEditor.java:197)
at javassist.expr.ExprEditor.doit(ExprEditor.java:96)
at javassist.CtClassType.instrument(CtClassType.java:1541)
at org.powermock.core.transformers.javassist.InstrumentMockTransformer.transform(InstrumentMockTransformer.java:41)
at org.powermock.core.transformers.javassist.AbstractJavaAssistMockTransformer.transform(AbstractJavaAssistMockTransformer.java:40)
at org.powermock.core.transformers.support.DefaultMockTransformerChain.transform(DefaultMockTransformerChain.java:43)
at org.powermock.core.classloader.MockClassLoader.transformClass(MockClassLoader.java:184)
at org.powermock.core.classloader.javassist.JavassistMockClassLoader.defineAndTransformClass(JavassistMockClassLoader.java:102)