java.lang.NullPointerException
   at org.netbeans.api.project.ProjectUtils.getSources(ProjectUtils.java:121)
   at org.netbeans.modules.java.testrunner.Utils.getJavaSourceGroups(Utils.java:681)
   at org.netbeans.modules.java.testrunner.CommonTestUtil.findSourceGroupOwner(CommonTestUtil.java:242)
   at org.netbeans.modules.java.testrunner.CommonTestUtil.findSourceGroupOwner(CommonTestUtil.java:226)
   at org.netbeans.modules.java.testrunner.hints.Utils.populateLocations(Utils.java:150)
   at org.netbeans.modules.java.testrunner.hints.Utils.getValidCombinations(Utils.java:86)
   at org.netbeans.modules.java.testrunner.hints.CreateTestMethodsHint.computeWarning(CreateTestMethodsHint.java:127)
   at sun.reflect.GeneratedMethodAccessor252.invoke(GeneratedMethodAccessor252.java:0)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:483)
   at org.netbeans.modules.java.hints.providers.code.CodeHintProviderImpl$WorkerImpl.createErrors(CodeHintProviderImpl.java:336)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.runHint(HintsInvoker.java:790)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.access$400(HintsInvoker.java:111)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker$ScannerImpl.runAndAdd(HintsInvoker.java:657)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker$ScannerImpl.scanDoNotGoDeeper(HintsInvoker.java:711)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeSuggestions(HintsInvoker.java:396)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:232)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:209)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:182)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:149)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsTask.run(HintsTask.java:114)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsTask.run(HintsTask.java:83)
   at org.netbeans.modules.java.source.JavaSourceAccessor$CancelableTaskWrapper.run(JavaSourceAccessor.java:298)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:568)
   at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:744)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   at java.util.concurrent.FutureTask.run(FutureTask.java:266)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)