Since 03/31 several j2ee tests fail due to the same assertion error, although 
the stack trace is different.

java.lang.AssertionError
	at 
org.netbeans.modules.java.source.usages.Index.getNbUserDir(Index.java:195)
	at 
org.netbeans.modules.java.source.usages.Index.getCacheFolder(Index.java:201)
	at 
org.netbeans.modules.java.source.usages.Index.loadSegments(Index.java:80)
...

I'm raising this to P2.

Created attachment 40432 [details]
stacktrace

The issue has two parts.
The first (reported by Jesse): The test doesn't use java infrastructure, so the
assertion error shouldn't be thrown.
The second (reported by Erno): The code uses a java infrastructure, the test
should use the IndexUtil.setCacheFolder (File) to set up the java infrastructure.

I see, so for tests the cache folder can be any empty folder?

Yes, an empty folder is fine. Typically an empty folder under the test work dir,
so cleanWorkingDir () deletes it.

Checking in src/org/netbeans/modules/java/source/usages/Index.java;
/cvs/java/source/src/org/netbeans/modules/java/source/usages/Index.java,v  <-- 
Index.java
new revision: 1.11; previous revision: 1.10
done
Checking in src/org/netbeans/modules/java/source/usages/NBLockFactory.java;
/cvs/java/source/src/org/netbeans/modules/java/source/usages/NBLockFactory.java,v
 <--  NBLockFactory.java
new revision: 1.2; previous revision: 1.1
done

Testsuite: org.netbeans.modules.java.j2seproject.J2SESourcesTest
Tests run: 2, Failures: 0, Errors: 0, Time elapsed: 5.664 sec

Apr 10, 2007 8:44:05 PM org.openide.util.Exceptions printStackTrace
SEVERE: null
java.lang.AssertionError
	at org.netbeans.modules.java.source.usages.Index.getCacheFolder(Index.java:199)
	at org.netbeans.modules.java.source.usages.Index.loadSegments(Index.java:78)
	at org.netbeans.modules.java.source.usages.Index.getDataFolder(Index.java:146)
	at
org.netbeans.modules.java.source.usages.ClassIndexManager.createUsagesQuery(ClassIndexManager.java:79)
	at
org.netbeans.modules.java.source.usages.RepositoryUpdater$CompileWorker.scanRoots(RepositoryUpdater.java:887)
	at
org.netbeans.modules.java.source.usages.RepositoryUpdater$CompileWorker.access$1500(RepositoryUpdater.java:617)
	at
org.netbeans.modules.java.source.usages.RepositoryUpdater$CompileWorker$1.run(RepositoryUpdater.java:708)
	at
org.netbeans.modules.java.source.usages.RepositoryUpdater$CompileWorker$1.run(RepositoryUpdater.java:645)
	at
org.netbeans.modules.java.source.usages.ClassIndexManager.writeLock(ClassIndexManager.java:49)
	at
org.netbeans.modules.java.source.usages.RepositoryUpdater$CompileWorker.run(RepositoryUpdater.java:642)
	at
org.netbeans.modules.java.source.usages.RepositoryUpdater$CompileWorker.run(RepositoryUpdater.java:617)
	at org.netbeans.api.java.source.JavaSource$CompilationJob.run(JavaSource.java:1112)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:417)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)
	at java.util.concurrent.FutureTask.run(FutureTask.java:123)
	at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
	at java.lang.Thread.run(Thread.java:595)
Caused by: While scanning:
jar:file:/space/src/nb_all/java/j2seproject/build/test/unit/work/org.netbeans.modules.java.j2seproject.J2SESourcesTest/testIncludesExcludes/proj/$%7Blibs.junit.classpath%7D!/

I see, the problem is that the MainClassUpdater start the java infrastructure
and the infrastructure is not properly initialized (there is no nb user dir).

Here's another problem:

java.lang.AssertionError
        at
org.netbeans.modules.java.source.usages.NBLockFactory.getLockDir(NBLockFactory.java:62)
        at
org.netbeans.modules.java.source.usages.NBLockFactory.clearLocks(NBLockFactory.java:50)
        at
org.netbeans.modules.java.source.JBrowseModule.restored(JBrowseModule.java:57)
        at org.netbeans.core.startup.NbInstaller.loadCode(NbInstaller.java:364)
        at org.netbeans.core.startup.NbInstaller.load(NbInstaller.java:273)
        at org.netbeans.ModuleManager.enable(ModuleManager.java:903)
        at org.netbeans.core.startup.ModuleList.installNew(ModuleList.java:380)
        at org.netbeans.core.startup.ModuleList.trigger(ModuleList.java:316)
        at org.netbeans.core.startup.ModuleSystem.restore(ModuleSystem.java:260)
        at org.netbeans.core.startup.Main.getModuleSystem(Main.java:149)
        at org.netbeans.core.startup.MainLookup.beforeLookup(MainLookup.java:190)
        at org.openide.util.lookup.ProxyLookup.lookup(ProxyLookup.java:187)
        at org.netbeans.modules.apisupport.project.TestBase.setUp(TestBase.java:98)
        at
org.netbeans.modules.apisupport.project.queries.ClassPathProviderImplTest.setUp(ClassPathProviderImplTest.java:77)
        at org.netbeans.junit.NbTestCase.runBare(NbTestCase.java:278)
        [....]

OK, this one should be easy to fix.

Checking in NBLockFactory.java;
/cvs/java/source/src/org/netbeans/modules/java/source/usages/NBLockFactory.java,v
 <--  NBLockFactory.java
new revision: 1.3; previous revision: 1.2
done

Checking in src/org/netbeans/modules/java/j2seproject/MainClassUpdater.java;
/cvs/java/j2seproject/src/org/netbeans/modules/java/j2seproject/MainClassUpdater.java,v
 <--  MainClassUpdater.java
new revision: 1.10; previous revision: 1.9
done