Powermock – java.lang.IllegalStateException：无法转换类

描述：

我试图从类中测试静态方法。 我使用powerMock（1.6.2）+ mockito（1.10.19）与Junit4（4.12）和java8一起进行模拟。

问题：

获取错误：“无法转换名为com.gs.ops.domain.StaticClass的类原因：java.io.IOException：无效的常量类型：18”

解决方案：

1. 谷歌搜索线程与powermock问题 – mockito和java-8

2. 从powermock中排除了java协助，并添加了java协助3.19.0-GA

3. 试过不同版本的powermock（1.5.4,1.6.2 ……）

下面是exception堆栈跟踪：

java.lang.IllegalStateException: Failed to transform class with name com.StaticClass. Reason: java.io.IOException: invalid constant type: 18 at org.powermock.core.classloader.MockClassLoader.loadMockClass(MockClassLoader.java:266) at org.powermock.core.classloader.MockClassLoader.loadModifiedClass(MockClassLoader.java:180) at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass(DeferSupportingClassLoader.java:68) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:340) at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.createDelegatorFromClassloader(JUnit4TestSuiteChunkerImpl.java:145) at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.createDelegatorFromClassloader(JUnit4TestSuiteChunkerImpl.java:40) at org.powermock.tests.utils.impl.AbstractTestSuiteChunkerImpl.createTestDelegators(AbstractTestSuiteChunkerImpl.java:244) at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.(JUnit4TestSuiteChunkerImpl.java:61) at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.(AbstractCommonPowerMockRunner.java:32) at org.powermock.modules.junit4.PowerMockRunner.(PowerMockRunner.java:34) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:408) at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:104) at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:86) 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:33) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:67) Caused by: java.lang.RuntimeException: java.io.IOException: invalid constant type: 18 at javassist.CtClassType.getClassFile2(CtClassType.java:203) at javassist.compiler.MemberResolver.lookupMethod(MemberResolver.java:110) at javassist.compiler.MemberResolver.lookupMethod(MemberResolver.java:96) at javassist.compiler.TypeChecker.atMethodCallCore(TypeChecker.java:704) at javassist.expr.NewExpr$ProceedForNew.setReturnType(NewExpr.java:243) at javassist.compiler.JvstTypeChecker.atCallExpr(JvstTypeChecker.java:146) at javassist.compiler.ast.CallExpr.accept(CallExpr.java:45) at javassist.compiler.TypeChecker.atVariableAssign(TypeChecker.java:248) at javassist.compiler.TypeChecker.atAssignExpr(TypeChecker.java:217) at javassist.compiler.ast.AssignExpr.accept(AssignExpr.java:38) at javassist.compiler.CodeGen.doTypeCheck(CodeGen.java:241) at javassist.compiler.CodeGen.atStmnt(CodeGen.java:329) at javassist.compiler.ast.Stmnt.accept(Stmnt.java:49) at javassist.compiler.CodeGen.atStmnt(CodeGen.java:350) at javassist.compiler.ast.Stmnt.accept(Stmnt.java:49) at javassist.compiler.CodeGen.atIfStmnt(CodeGen.java:404) at javassist.compiler.CodeGen.atStmnt(CodeGen.java:354) at javassist.compiler.ast.Stmnt.accept(Stmnt.java:49) at javassist.compiler.Javac.compileStmnt(Javac.java:568) at javassist.expr.NewExpr.replace(NewExpr.java:206) at org.powermock.core.transformers.impl.MainMockTransformer$PowerMockExpressionEditor.edit(MainMockTransformer.java:418) at javassist.expr.ExprEditor.loopBody(ExprEditor.java:211) at javassist.expr.ExprEditor.doit(ExprEditor.java:90) at javassist.CtClassType.instrument(CtClassType.java:1374) at org.powermock.core.transformers.impl.MainMockTransformer.transform(MainMockTransformer.java:74) at org.powermock.core.classloader.MockClassLoader.loadMockClass(MockClassLoader.java:251) ... 24 more Caused by: java.io.IOException: invalid constant type: 18 at javassist.bytecode.ConstPool.readOne(ConstPool.java:1090) at javassist.bytecode.ConstPool.read(ConstPool.java:1033) at javassist.bytecode.ConstPool.(ConstPool.java:149) at javassist.bytecode.ClassFile.read(ClassFile.java:737) at javassist.bytecode.ClassFile.(ClassFile.java:108) at javassist.CtClassType.getClassFile2(CtClassType.java:190) ... 49 more 

Pom文件：

  org.powermock powermock-api-mockito 1.6.2 test   org.powermock powermock-module-junit4 1.6.2   org.junit junit   org.powermock powermock-core   org.powermock powermock-reflect   test   org.javassist javassist 3.19.0-GA  

Answer 1

Powermock 1.6.3使用javassist 3.15.2-GA，它不支持某些类型。 使用3.18.2-GA javassist为我工作。 您可能希望覆盖项目中的依赖项。

   org.javassist javassist 3.18.2-GA  

在模拟系统类时，你可能会遇到另一个问题，解决方案就是Mockito + PowerMock LinkageError

希望这可以帮助。

Answer 2

因此，在3.18.2之前似乎存在javassist （字节码工具包）的问题，因为已经解析了JIRA票证-223 。

1 –要在pom.xml中查找javassist版本，可以使用mvn dependency任务

 $ mvn dependency:tree | grep javassist [INFO] | \- org.javassist:javassist:jar:3.14.0-GA:compile 

由powermock-module-junit4-rule ，

 [INFO] +- org.powermock:powermock-module-junit4-rule:jar:1.4.9:test [INFO] | +- org.powermock:powermock-classloading-base:jar:1.4.9:test [INFO] | \- org.powermock:powermock-core:jar:1.4.9:compile [INFO] | \- org.javassist:javassist:jar:3.14.0-GA:compile 

2 –因此，显式更新javassist版本到任何版本>= 3.18.2应该有效。

就我而言，我正在使用3.20.0-GA

   org.javassist javassist 3.20.0-GA  

工作例如。 与scalatest

 @PowerMockIgnore(Array("javax.management.*")) @RunWith(classOf[PowerMockRunner]) @PrepareForTest(Array(classOf[Configurator])) class LogServiceSpec { @Test def initialises_log4j2_on_each_instance_call() { PowerMockito.mockStatic(classOf[Configurator]) val logService1 = new LogService PowerMockito.verifyStatic(Mockito.times(1)) Configurator.initialize(Matchers.anyString(), Matchers.eq("log4j.config")) } } 

Answer 3

这是由于依赖性冲突引起的。 解决依赖冲突是解决此问题的一种方法，另一种方法是重新排序pom.xml中的元素。 将powermock依赖性声明移动到部分的顶部。 这是一个完整的黑客，解决它的正确方法是解决依赖冲突。

要识别这些冲突，您可以使用命令“mvn dependency：tree”。 这是我的应用程序的依赖树，我遇到了同样的问题。 请注意，树中存在“javassist”的两个依赖项。

 [INFO] +- org.mockito:mockito-core:jar:1.10.19:test [INFO] | +- org.hamcrest:hamcrest-core:jar:1.1:compile [INFO] | \- org.objenesis:objenesis:jar:2.1:compile [INFO] +- org.powermock:powermock-module-junit4:jar:1.6.4:test [INFO] | \- org.powermock:powermock-module-junit4-common:jar:1.6.4:test [INFO] | +- org.powermock:powermock-core:jar:1.6.4:compile [INFO] | | \- org.javassist:javassist:jar:3.20.0-GA:compile [INFO] | \- org.powermock:powermock-reflect:jar:1.6.4:compile [INFO] +- org.powermock:powermock-api-mockito:jar:1.6.4:compile [INFO] | \- org.powermock:powermock-api-support:jar:1.6.4:compile [INFO] +- org.slf4j:slf4j-log4j12:jar:1.7.14:compile [INFO] | +- org.slf4j:slf4j-api:jar:1.7.14:compile [INFO] | \- log4j:log4j:jar:1.2.17:compile [INFO] | +- org.apache.struts:struts2-core:jar:2.3.16.3-atlassian-6:provided [INFO] | | \- ognl:ognl:jar:3.0.6:provided  [INFO] | | \- javassist:javassist:jar:3.11.0.GA:provided [INFO] | +- com.atlassian:webwork-compat:jar:1.24:provided [INFO] | +- org.freemarker:freemarker:jar:2.3.16-atlassian-34:provided [INFO] | | \- logkit:logkit:jar:1.2:provided [INFO] | +- opensymphony:sitemesh:jar:2.5-atlassian-6:provided [INFO] | +- commons-fileupload:commons-fileupload:jar:1.3.1:provided [INFO] | +- org.tuckey:urlrewritefilter:jar:4.0.3:provided [INFO] | +- velocity-tools:velocity-tools:jar:1.2:provided [INFO] | +- commons-dbutils:commons-dbutils:jar:1.3:provided [INFO] | +- org.hamcrest:hamcrest-all:jar:1.3:provided [INFO] | +- com.atlassian.bamboo:atlassian-user-crowd-provider:jar:5.10.0:provided [INFO] | | +- com.atlassian.crowd:crowd-integration-client-rest:jar:2.7.2:provided [INFO] | | | \- com.atlassian.crowd:crowd-integration-client-common:jar:2.7.2:provided [INFO] | | | \- com.atlassian.security:atlassian-cookie-tools:jar:3.2:provided [INFO] | | +- com.atlassian.crowd:crowd-integration-api:jar:2.7.2:provided [INFO] | | | \- com.atlassian.crowd:embedded-crowd-api:jar:2.7.2:provided [INFO] | | +- com.atlassian.user:atlassian-user-api:jar:4.1.1:provided [INFO] | | | \- com.opensymphony.propertyset:api:jar:1.6.0-m1:provided [INFO] | | +- com.atlassian.user:atlassian-user-ldap:jar:4.1.1:provided [INFO] | | +- org.acegisecurity:acegi-security:jar:1.0.4:provided [INFO] | | | \- oro:oro:jar:2.0.8:provided [INFO] | | \- com.atlassian.crowd:crowd-integration-seraph25:jar:2.7.2:provided [INFO] | +- javax.xml.stream:stax-api:jar:1.0-2:provided [INFO] | +- com.atlassian.core:atlassian-core:jar:5.0.2:provided [INFO] | | \- com.atlassian.image:atlassian-image-consumer:jar:1.0.1:provided [INFO] | +- org.apache.maven:maven-embedder:jar:3.0.4:provided [INFO] | | +- org.apache.maven:maven-settings:jar:3.0.4:provided [INFO] | | +- org.apache.maven:maven-plugin-api:jar:3.0.4:provided [INFO] | | +- org.apache.maven:maven-model-builder:jar:3.0.4:provided [INFO] | | +- org.apache.maven:maven-compat:jar:3.0.4:provided [INFO] | | +- org.codehaus.plexus:plexus-classworlds:jar:2.4:provided [INFO] | | +- org.sonatype.sisu:sisu-inject-plexus:jar:2.3.0:provided [INFO] | | | \- org.sonatype.sisu:sisu-inject-bean:jar:2.3.0:provided [INFO] | | +- org.codehaus.plexus:plexus-component-annotations:jar:1.5.5:provided [INFO] | | +- org.sonatype.plexus:plexus-sec-dispatcher:jar:1.3:provided [INFO] | | +- org.sonatype.plexus:plexus-cipher:jar:1.7:provided [INFO] | | \- commons-cli:commons-cli:jar:1.2:provided [INFO] | +- org.apache.maven:maven-model:jar:3.0.4:provided [INFO] | +- com.octo.captcha:jcaptcha:jar:2.0-alpha-1:provided [INFO] | +- com.octo.captcha:jcaptcha-api:jar:2.0-alpha-1:provided [INFO] | +- com.jhlabs:filters:jar:2.0.235:provided [INFO] | +- org.apache.struts:struts2-sitemesh-plugin:jar:2.1.8.1:provided [INFO] | +- org.slf4j:jul-to-slf4j:jar:1.7.10:provided [INFO] | +- com.atlassian.plugins:atlassian-plugins-schema:jar:4.0.5:provided [INFO] | | \- com.atlassian.plugins:atlassian-plugins-osgi:jar:4.0.5:provided [INFO] | | +- com.atlassian.plugins:atlassian-plugins-osgi-events:jar:4.0.5:provided [INFO] | | +- biz.aQute.bnd:biz.aQute.bndlib:jar:2.4.1:provided [INFO] | | +- org.apache.felix:org.apache.felix.framework:jar:4.2.1:provided [INFO] | | \- org.twdata.pkgscanner:package-scanner:jar:0.9.5:provided [INFO] | \- xerces:xercesImpl:jar:2.11.0:provided [INFO] | \- xml-apis:xml-apis:jar:1.4.01:provided [INFO] +- junit:junit:jar:4.12:test [INFO] +- info.cukes:cucumber-java:jar:1.2.4:test [INFO] | \- info.cukes:cucumber-core:jar:1.2.4:test [INFO] | +- info.cukes:cucumber-html:jar:0.2.3:test [INFO] | +- info.cukes:cucumber-jvm-deps:jar:1.0.5:test [INFO] | \- info.cukes:gherkin:jar:2.12.2:test [INFO] +- info.cukes:cucumber-junit:jar:1.2.4:test [INFO] +- com.atlassian.plugins:atlassian-plugins-osgi-testrunner:jar:1.2.3:test [INFO] | +- org.apache.wink:wink-client:jar:1.1.3-incubating:test [INFO] | | +- org.apache.wink:wink-common:jar:1.1.3-incubating:test [INFO] | | | \- org.apache.geronimo.specs:geronimo-annotation_1.1_spec:jar:1.0:test [INFO] | | +- javax.xml.bind:jaxb-api:jar:2.2:test [INFO] | | \- com.sun.xml.bind:jaxb-impl:jar:2.2.1.1:test [INFO] | +- commons-io:commons-io:jar:1.4:provided [INFO] | \- com.atlassian.upm:upm-api:jar:2.15:test [INFO] +- javax.ws.rs:jsr311-api:jar:1.1.1:provided [INFO] +- com.google.code.gson:gson:jar:2.2.2-atlassian-1:compile [INFO] +- com.mashape.unirest:unirest-java:jar:1.3.3:compile [INFO] +- org.apache.httpcomponents:httpclient:jar:4.3.1:compile [INFO] | +- org.apache.httpcomponents:httpcore:jar:4.3:compile [INFO] | \- commons-codec:commons-codec:jar:1.6:compile [INFO] +- org.apache.httpcomponents:httpasyncclient:jar:4.0:compile [INFO] | \- org.apache.httpcomponents:httpcore-nio:jar:4.3:compile [INFO] +- org.apache.httpcomponents:httpmime:jar:4.3.1:compile [INFO] +- org.json:json:jar:20090211:compile [INFO] +- com.fasterxml.jackson.core:jackson-core:jar:2.3.3:compile [INFO] \- com.fasterxml.jackson.core:jackson-databind:jar:2.3.3:compile [INFO] \- com.fasterxml.jackson.core:jackson-annotations:jar:2.3.0:compile 

我希望这有帮助。

Answer 4

在我的例子中，“java.io.IOException：invalid constant type：18”是由我的类路径中的多个版本的javassist库引起的 – 包括3.12.1.GA和3.18.2-GA。 当我删除旧版本时，问题就消失了。

Answer 5

不是真正的答案！ 使用JDK8运行Maven构建并生成Java6字节代码时出现类似错误。 我的pom看起来像这样：

   org.apache.maven.plugins maven-compiler-plugin 2.3.2  1.6 1.6 1.6 2000m true   

当我恢复到JDK6时，我不再收到错误。

Answer 6

在我的案例中，JRE系统库 – >执行环境是在JavaSE-1.7上设置的，但唯一安装的JRE是JRE1.8。 所以它指向java 8代替java 7.一旦我转移到java 7，它开始为我工作正常。