Struts 7: action class finder

Hi,

I currently migrating an application from struts 6 to 7 using the 
pre-release. I am using the convention plugin and I am getting the 
following error:

ERROR [org.apache.struts2.convention.DefaultClassFinder] (default 
task-1) Error loading class [org.apache.struts2.XWorkTestCase]: 
java.lang.NoClassDefFoundError: Failed to link 
org/apache/struts2/XWorkTestCase (Module "deployment.coreweb.war" from 
Service Module Loader): junit/framework/TestCase
     at java.base/java.lang.ClassLoader.defineClass1(Native Method)
     at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1017)
     at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1095)
     at 
org.jboss.modules.ModuleClassLoader.doDefineOrLoadClass(ModuleClassLoader.java:351)
     at 
org.jboss.modules.ModuleClassLoader.defineClass(ModuleClassLoader.java:482)
     at 
org.jboss.modules.ModuleClassLoader.loadClassLocal(ModuleClassLoader.java:276)
     at 
org.jboss.modules.ModuleClassLoader$1.loadClassLocal(ModuleClassLoader.java:79)
     at org.jboss.modules.Module.loadModuleClass(Module.java:797)
     at 
org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:192)
     at 
org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:408)
     at 
org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:396)
     at 
org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:115)
     at 
deployment.coreweb.war//org.apache.struts2.util.finder.ClassLoaderInterfaceDelegate.loadClass(ClassLoaderInterfaceDelegate.java:38)
     at 
deployment.coreweb.war//org.apache.struts2.util.finder.ClassFinder$ClassInfo.get(ClassFinder.java:228)
     at 
deployment.coreweb.war//org.apache.struts2.convention.PackageBasedActionConfigBuilder$1.test(PackageBasedActionConfigBuilder.java:663)
     at 
deployment.coreweb.war//org.apache.struts2.convention.PackageBasedActionConfigBuilder$1.test(PackageBasedActionConfigBuilder.java:650)
     at 
deployment.coreweb.war//org.apache.struts2.convention.DefaultClassFinder.findClasses(DefaultClassFinder.java:280)
     at 
deployment.coreweb.war//org.apache.struts2.convention.PackageBasedActionConfigBuilder.findActions(PackageBasedActionConfigBuilder.java:432)
     at 
deployment.coreweb.war//org.apache.struts2.convention.PackageBasedActionConfigBuilder.buildActionConfigs(PackageBasedActionConfigBuilder.java:388)
     at 
deployment.coreweb.war//org.apache.struts2.convention.ClasspathPackageProvider.loadPackages(ClasspathPackageProvider.java:55)
     at 
deployment.coreweb.war//org.apache.struts2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:317)
     at 
deployment.coreweb.war//org.apache.struts2.config.ConfigurationManager.reload(ConfigurationManager.java:227)
     at 
deployment.coreweb.war//org.apache.struts2.config.ConfigurationManager.initialiseConfiguration(ConfigurationManager.java:84)
     at 
deployment.coreweb.war//org.apache.struts2.config.ConfigurationManager.wasConfigInitialised(ConfigurationManager.java:72)
     at 
deployment.coreweb.war//org.apache.struts2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:61)
     at 
deployment.coreweb.war//org.apache.struts2.dispatcher.Dispatcher.getContainer(Dispatcher.java:1141)
     at 
deployment.coreweb.war//org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:643)
     at 
deployment.coreweb.war//org.apache.struts2.dispatcher.InitOperations.initDispatcher(InitOperations.java:43)
     at 
deployment.coreweb.war//org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:58)

In PackageBasedActionConfigBuilder, all potential action classes are 
being checked (line 663). XWorkTestCase is in the candidates list but 
without having junit:junit as a dependency (which is declared as 
optional) this class cannot be loaded and tested. In this case, 
NoClassDefFoundError is thrown which is not being caught (line 664). I 
think the catch statement has to be extended to handle 
NoClassDefFoundError accordingly.
What do you think, do you want me to create a JIRA ticket? (or pull 
request?)

regards,
Florian