With test file, there would be a nullpointerexception

java.lang.NullPointerException at org.pmesmeur.sketchit.diagram.clazz.Finder.isTestFile(Finder.java:80) at org.pmesmeur.sketchit.diagram.clazz.Finder.computeManagedPsiClassesFromFiles(Finder.java:58) at org.pmesmeur.sketchit.diagram.clazz.Finder.findClasses(Finder.java:47) at org.pmesmeur.sketchit.diagram.clazz.Finder.<init>(Finder.java:27) at org.pmesmeur.sketchit.diagram.clazz.ClassDiagramGenerator.createListOfClassesToManage(ClassDiagramGenerator.java:120) at org.pmesmeur.sketchit.diagram.clazz.ClassDiagramGenerator.<init>(ClassDiagramGenerator.java:114) at org.pmesmeur.sketchit.diagram.clazz.ClassDiagramGenerator$Builder.build(ClassDiagramGenerator.java:97) at org.pmesmeur.sketchit.diagram.UmlModuleClassDiagram.generateDiagram(UmlModuleClassDiagram.java:47) at org.pmesmeur.sketchit.diagram.UmlDiagram.generateDiagram(UmlDiagram.java:43) at org.pmesmeur.sketchit.diagram.UmlDiagram.generate(UmlDiagram.java:24) at org.pmesmeur.sketchit.diagram.UmlDiagramsGenerator.generateModuleClassDiagram(UmlDiagramsGenerator.java:44) at org.pmesmeur.sketchit.diagram.UmlDiagramsGenerator.generateClassDiagrams(UmlDiagramsGenerator.java:35) at org.pmesmeur.sketchit.SketchIt.generatePlantUmlDiagram(SketchIt.java:62) at org.pmesmeur.sketchit.SketchIt.actionBody(SketchIt.java:49) at org.pmesmeur.sketchit.SketchIt.access$000(SketchIt.java:13) at org.pmesmeur.sketchit.SketchIt$1.run(SketchIt.java:36) at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:1038) at org.pmesmeur.sketchit.SketchIt.runInsideAnIntellijWriteAction(SketchIt.java:34) at org.pmesmeur.sketchit.SketchIt.actionPerformed(SketchIt.java:28) at com.intellij.openapi.actionSystem.ex.ActionUtil$1.run(ActionUtil.java:255) at com.intellij.openapi.actionSystem.ex.ActionUtil.performActionDumbAware(ActionUtil.java:272) at com.intellij.openapi.actionSystem.impl.ActionMenuItem$ActionTransmitter.lambda$actionPerformed$0(ActionMenuItem.java:304) at com.intellij.openapi.wm.impl.FocusManagerImpl.runOnOwnContext(FocusManagerImpl.java:307) at com.intellij.openapi.wm.impl.IdeFocusManagerImpl.runOnOwnContext(IdeFocusManagerImpl.java:106) at com.intellij.openapi.actionSystem.impl.ActionMenuItem$ActionTransmitter.actionPerformed(ActionMenuItem.java:294) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022) at com.intellij.openapi.actionSystem.impl.ActionMenuItem.lambda$fireActionPerformed$0(ActionMenuItem.java:114) at com.intellij.openapi.application.TransactionGuardImpl.runSyncTransaction(TransactionGuardImpl.java:88) at com.intellij.openapi.application.TransactionGuardImpl.lambda$submitTransaction$1(TransactionGuardImpl.java:111) at com.intellij.openapi.application.TransactionGuardImpl.submitTransaction(TransactionGuardImpl.java:120) at com.intellij.openapi.application.TransactionGuard.submitTransaction(TransactionGuard.java:122) at com.intellij.openapi.actionSystem.impl.ActionMenuItem.fireActionPerformed(ActionMenuItem.java:114) at com.intellij.ui.plaf.beg.BegMenuItemUI.doClick(BegMenuItemUI.java:529) at com.intellij.ui.plaf.beg.BegMenuItemUI.access$300(BegMenuItemUI.java:49) at com.intellij.ui.plaf.beg.BegMenuItemUI$MyMouseInputHandler.mouseReleased(BegMenuItemUI.java:549) at java.awt.Component.processMouseEvent(Component.java:6548) at javax.swing.JComponent.processMouseEvent(JComponent.java:3325) at java.awt.Component.processEvent(Component.java:6313) at java.awt.Container.processEvent(Container.java:2237) at java.awt.Component.dispatchEventImpl(Component.java:4903) at java.awt.Container.dispatchEventImpl(Container.java:2295) at java.awt.Component.dispatchEvent(Component.java:4725) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4889) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4526) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4467) at java.awt.Container.dispatchEventImpl(Container.java:2281) at java.awt.Window.dispatchEventImpl(Window.java:2746) at java.awt.Component.dispatchEvent(Component.java:4725) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:764) at java.awt.EventQueue.access$500(EventQueue.java:98) at java.awt.EventQueue$3.run(EventQueue.java:715) at java.awt.EventQueue$3.run(EventQueue.java:709) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90) at java.awt.EventQueue$4.run(EventQueue.java:737) at java.awt.EventQueue$4.run(EventQueue.java:735) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80) at java.awt.EventQueue.dispatchEvent(EventQueue.java:734) at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:781) at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:718) at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:382) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

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