[rules-users] Odd class loading issues (java.lang.NoClassDefFoundError wrong name) running JUnit test cases via Ant

[Weaver, Scott]

Hi,

I am running into a strange classloader issue when running test cases in Ant.  Outside of Ant, the test cases and application itself just run fine.  It's only when I attempt to run the test case from within Ant that I get the error below:

Drools 5.0.1
Ant 1.6
JUnit 4.7

  <testcase classname="com.siemens.pl.it.gre.rules.TestJUnit" name="testRule" time="1.75">
    <error message="TestObject (wrong name: com/siemens/pl/it/gre/rules/TestObject)" type="java.lang.NoClassDefFoundError">java.lang.NoClassDefFoundError: TestObject (wrong name: com/siemens/pl/it/gre/rules/TestObject)
      at java.lang.ClassLoader.defineClass1(Native Method)
      at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
      at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
      at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
      at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
      at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
      at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
      at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
      at java.lang.Class.forName0(Native Method)
      at java.lang.Class.forName(Class.java:242)
      at org.drools.rule.CompositeClassLoader.loadClass(CompositeClassLoader.java:61)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
      at org.drools.base.ClassTypeResolver.resolveType(ClassTypeResolver.java:144)
      at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:140)
      at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:104)
      at org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:69)
      at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:68)
      at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:1159)
      at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:649)
      at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:290)
      at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:488)
      at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:25)
      at com.siemens.pl.it.gre.rules.AbstractRulesTestCase.createRuleBase(AbstractRulesTestCase.java:62)
      at com.siemens.pl.it.gre.rules.TestJUnit.setUp(TestJUnit.java:21)
</error>


Ant snippet:
      <target name="unitTest2">
            <junit fork="yes">
                  <classpath>
                        <path refid="classpath" />
                  </classpath>

                  <formatter type="xml" />
                  <test name="com.siemens.pl.it.gre.rules.TestJUnit" haltonfailure="yes" outfile="${test.reports.dir}/results">
                        <formatter type="xml" />
                  </test>
            </junit>
      </target>

Turning the "fork" option off has no effect.


Example rule:
package com.siemens.pl.it.rules.test

import com.siemens.pl.it.gre.rules.TestObject;


rule "Is Value 'foo'?"

      when
            $testObj : TestObject( value == "foo" )
      then
            $testObj.setResult(true);

end


Interestingly, if I fully-qualify the class in LHS like this: com.siemens.pl.it.rules.test.TestObject( value == "foo" ), the test runs just fine though I would prefer not to have to do this in all my rules if at all possible.

Thanks,
-scott
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