[groovy-user] Problem using JUnit 4, NoClassDefFound: org/hamcrest/Description
Jonathan Bernard
I am trying to do some unit testing with Groovy 1.7.0 and JUnit 4.7
(from $GROOVY_HOME/lib). When I try to compile my test classes I
receive the following error:
java.lang.NoClassDefFoundError: org/hamcrest/Description
at java.lang.Class.getDeclaredFields0(Native Method)
at java.lang.Class.privateGetDeclaredFields(Class.java:2291)
at java.lang.Class.getDeclaredFields(Class.java:1743)
at org.codehaus.groovy.vmplugin.v5.Java5.configureClassNode(Java5.java:306)
at org.codehaus.groovy.ast.ClassNode.lazyClassInit(ClassNode.java:263)
at org.codehaus.groovy.ast.ClassNode.getDeclaredMethods(ClassNode.java:830)
at org.codehaus.groovy.ast.ClassNode.getMethods(ClassNode.java:845)
at org.codehaus.groovy.ast.ClassNode.hasPossibleStaticMethod(ClassNode.java:1217)
at org.codehaus.groovy.control.StaticImportVisitor.findStaticMethod(StaticImportVisitor.java:368)
at org.codehaus.groovy.control.StaticImportVisitor.findStaticMethodImportFromModule(StaticImportVisitor.java:344)
at org.codehaus.groovy.control.StaticImportVisitor.transformMethodCallExpression(StaticImportVisitor.java:177)
at org.codehaus.groovy.control.StaticImportVisitor.transform(StaticImportVisitor.java:77)
at org.codehaus.groovy.ast.ClassCodeExpressionTransformer.visitExpressionStatement(ClassCodeExpressionTransformer.java:139)
at org.codehaus.groovy.ast.stmt.ExpressionStatement.visit(ExpressionStatement.java:40)
at org.codehaus.groovy.ast.CodeVisitorSupport.visitBlockStatement(CodeVisitorSupport.java:35)
at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitBlockStatement(ClassCodeVisitorSupport.java:161)
at org.codehaus.groovy.ast.stmt.BlockStatement.visit(BlockStatement.java:51)
at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClassCodeContainer(ClassCodeVisitorSupport.java:97)
at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitConstructorOrMethod(ClassCodeVisitorSupport.java:108)
at org.codehaus.groovy.ast.ClassCodeExpressionTransformer.visitConstructorOrMethod(ClassCodeExpressionTransformer.java:50)
at org.codehaus.groovy.control.StaticImportVisitor.visitConstructorOrMethod(StaticImportVisitor.java:56)
at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitMethod(ClassCodeVisitorSupport.java:119)
at org.codehaus.groovy.ast.ClassNode.visitContents(ClassNode.java:1044)
at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClass(ClassCodeVisitorSupport.java:50)
at org.codehaus.groovy.control.StaticImportVisitor.visitClass(StaticImportVisitor.java:51)
at org.codehaus.groovy.control.CompilationUnit$7.call(CompilationUnit.java:593)
at org.codehaus.groovy.control.CompilationUnit.applyToPrimaryClassNodes(CompilationUnit.java:957)
at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:517)
at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:495)
at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:472)
at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:456)
at org.codehaus.groovy.tools.FileSystemCompiler.compile(FileSystemCompiler.java:57)
at org.codehaus.groovy.tools.FileSystemCompiler.doCompilation(FileSystemCompiler.java:170)
at org.codehaus.groovy.ant.Groovyc.compile(Groovyc.java:816)
at org.codehaus.groovy.ant.Groovyc.execute(Groovyc.java:544)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
at org.apache.tools.ant.Task.perform(Task.java:348)
This is easily reproduced with the following build file and source:
build.xml:
==========
<project name="Error Example" default="compile-test" basedir=".">
<property environment="env"/>
<path id="classpath">
<fileset dir="${env.GROOVY_HOME}/lib">
<include name="**/*.jar"/>
</fileset>
</path>
<taskdef name="groovyc"
classname="org.codehaus.groovy.ant.Groovyc"
classpathref="classpath"/>
<target name="compile-test">
<groovyc
srcdir="${basedir}"
destdir="${basedir}"
classpathref="classpath"/>
</target>
</project>
error/example/ExampleTest.groovy:
=================================
package error.example
import org.junit.Test
import static org.junit.Assert.assertTrue
class ExampleTest {
@Test test1() {
assertTrue true
}
}
It seems that the
import static org.junit.Assert.assertTrue
is the trigger for the problem, but I do not understand what the
source of the problem is. There are no other JUnit jars on the
classpath, and the junit-4.7.jar contains the Hamcrest classes.
/org/hamcrest/Description.class specifically is in the jar. The
compile error persists even when I extract the junit jar and
specifically add the Hamcrest classes to the classpath.
I am not even using the hamcrest functionality. Anybody know what is going on?
java -version:
java version "1.6.0_15"
Java(TM) SE Runtime Environment (build 1.6.0_15-b03)
Java HotSpot(TM) Server VM (build 14.1-b02, mixed mode)
groovy -version:
Groovy Version: 1.7.0 JVM: 1.6.0_15
OS version:
Ubuntu 9.10
Thanks,
Jonathan Bernard
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Roshan Dawrani
Can you run the following build.xml and share its output? Let's see if it gives any hint.
------------------------------------------------------------------------------------
<project name="Error Example" default="junit" basedir=".">
<property environment="env"/>
<path id="classpath">
<fileset dir="${env.GROOVY_HOME}/lib">
<include name="**/*.jar"/>
</fileset>
</path>
<taskdef name="groovy"
classpathref="classpath"/>
<target name="junit">
<groovy>
import org.junit.Test
import org.junit.Assert
println Test.protectionDomain.codeSource.location
println Assert.protectionDomain.codeSource.location
</groovy>
</target>
</project>
------------------------------------------------------------------------------------
rgds,
Roshan
Jonathan Bernard
The build file you supplied threw the same exception I was seeing
before. I removed the
import org.junit.Assert
println Assert.protectionDomain.codeSource.location
to see what I could find. The JUnit library was being loaded from the
ant classpath ($ANT_HOME/lib/junit4.jar) and it did not have the
Hamcrest libraries compiled in. The fix I chose was to update the
junit library in the ant lib folder.
Thanks,
Jonathan Bernard