Description:
I am trying to test a static method from a class. I am using powerMock (1.6.2) + mockito (1.10.19) for mocking along with Junit4 (4.12) & java8.
Issue:
Getting the error: "Failed to transform class with name com.gs.ops.domain.StaticClass Reason: java.io.IOException: invalid constant type: 18"
Solutions Tried:
Googled threads for issue on with powermock - mockito & java-8
Excluded java assist from powermock and added java assist 3.19.0-GA
Tried different versions of powermock (1.5.4, 1.6.2...)
Below is the exception stack trace:
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.<init>(JUnit4TestSuiteChunkerImpl.java:61)
at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.<init>(AbstractCommonPowerMockRunner.java:32)
at org.powermock.modules.junit4.PowerMockRunner.<init>(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.<init>(ConstPool.java:149)
at javassist.bytecode.ClassFile.read(ClassFile.java:737)
at javassist.bytecode.ClassFile.<init>(ClassFile.java:108)
at javassist.CtClassType.getClassFile2(CtClassType.java:190)
... 49 more
Pom file:
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-api-mockito</artifactId>
<version>1.6.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-module-junit4</artifactId>
<version>1.6.2</version>
<exclusions>
<exclusion>
<groupId>org.junit</groupId>
<artifactId>junit</artifactId>
</exclusion>
<exclusion>
<groupId>org.powermock</groupId>
<artifactId>powermock-core</artifactId>
</exclusion>
<exclusion>
<groupId>org.powermock</groupId>
<artifactId>powermock-reflect</artifactId>
</exclusion>
</exclusions>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.javassist</groupId>
<artifactId>javassist</artifactId>
<version>3.19.0-GA</version>
</dependency>
Powermock 1.6.3 uses javassist 3.15.2-GA which does not support certain types. Using 3.18.2-GA javassist worked for me. You may want to override dependency in your project.
<dependency>
<groupId>org.javassist</groupId>
<artifactId>javassist</artifactId>
<version>3.18.2-GA</version>
</dependency>
You may face another problem for which the solution lies here Mockito + PowerMock LinkageError while mocking system class
Hope this helps.
So there seems to be issue with javassist
(bytecode toolkit) prior to 3.18.2
, as there's a resolved JIRA ticket-223.
1 - To find javassist version in your pom.xml, can use mvn dependency
task
$ mvn dependency:tree | grep javassist
[INFO] | \- org.javassist:javassist:jar:3.14.0-GA:compile
which is used by the 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 - So, updating the javassist
version by explicitly to any versions >= 3.18.2
should work.
As, in my case, I am using use 3.20.0-GA
<dependency>
<groupId>org.javassist</groupId>
<artifactId>javassist</artifactId>
<version>3.20.0-GA</version>
</dependency>
Working eg. with 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"))
}
}
This is caused because of the conflict of dependencies. Resolving the dependency conflicts is one way to resolve this issue and the other way is to reorder <dependency></dependency>
elements in your pom.xml. Move the powermock dependency declarations to the top of the <dependencies></dependencies>
section. This is a complete hack and the right way to resolve it would be to resolve the dependency conflicts.
To identify those conflict you may use the command "mvn dependency:tree". Here is the dependency tree for my application for which I came across this same problem. Notice that there are two dependencies of "javassist" in the tree.
[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] | <span style="background-color: #FFFF00">| \- org.javassist:javassist:jar:3.20.0-GA:compile</span>
[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
<span style="background-color: #FFFF00">
[INFO] | | \- javassist:javassist:jar:3.11.0.GA:provided</span>
[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
I hope this helps.
In my case, a "java.io.IOException: invalid constant type: 18" was caused by multiple versions of javassist libraries in my classpath - both 3.12.1.GA and 3.18.2-GA. The problem disappeared when i removed the older one.
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