JavaFX Test That fails in Windows and works in OSX and Linux

Question

I have a JavaFX test that fails only in windows , but works fine in OSX and Linux

Here is the stacktrace :

Edit : 1

Running com.myproject.meditor.SLIVCodeAreaTest
Tests run: 17, Failures: 0, Errors: 17, Skipped: 0, Time elapsed: 6.656 sec <<< FAILURE! - in com.myproject.meditor.SLIVCodeAreaTest
testRHBlock(com.myproject.meditor.SLIVCodeAreaTest)  Time elapsed: 0 sec  <<< ERROR!
java.lang.ExceptionInInitializerError: null
    at com.sun.glass.ui.Screen.getScreens(Screen.java:70)
    at com.sun.glass.ui.Screen.getMainScreen(Screen.java:61)
    at com.sun.javafx.font.PrismFontFactory.getSystemFontSize(PrismFontFactory.java:1911)
    at com.sun.javafx.font.PrismFontLoader.getSystemFontSize(PrismFontLoader.java:240)
    at javafx.scene.text.Font.getDefaultSystemFontSize(Font.java:71)
    at javafx.scene.text.Font.getDefault(Font.java:86)
    at javafx.scene.text.Text.getFont(Text.java:478)
    at javafx.scene.text.Text.getFontInternal(Text.java:487)
    at javafx.scene.text.Text.access$100(Text.java:95)
    at javafx.scene.text.Text$1.getFont(Text.java:206)
    at com.sun.javafx.text.GlyphLayout.breakRuns(GlyphLayout.java:174)
    at com.sun.javafx.text.PrismTextLayout.buildRuns(PrismTextLayout.java:770)
    at com.sun.javafx.text.PrismTextLayout.layout(PrismTextLayout.java:1021)
    at com.sun.javafx.text.PrismTextLayout.ensureLayout(PrismTextLayout.java:223)
    at com.sun.javafx.text.PrismTextLayout.getBounds(PrismTextLayout.java:246)
    at javafx.scene.text.TextFlow.computePrefWidth(TextFlow.java:203)
    at javafx.scene.Parent.prefWidth(Parent.java:915)
    at javafx.scene.layout.Region.prefWidth(Region.java:1419)
    at org.fxmisc.richtext.ParagraphBox.computePrefWidth(ParagraphBox.java:199)
    at org.fxmisc.richtext.ParagraphBox.computeMinWidth(ParagraphBox.java:191)
    at javafx.scene.Parent.minWidth(Parent.java:943)
    at javafx.scene.layout.Region.minWidth(Region.java:1383)
    at org.fxmisc.flowless.VerticalHelper.minBreadth(OrientationHelper.java:234)
    at org.fxmisc.flowless.OrientationHelper.minBreadth(OrientationHelper.java:44)
    at org.reactfx.collection.MappedList.get(MappedList.java:27)
    at org.reactfx.collection.MemoizationListImpl.force(MemoizationList.java:121)
    at org.fxmisc.flowless.SizeTracker.breadthFor(SizeTracker.java:161)
    at org.fxmisc.flowless.CellPositioner.getSizedCell(CellPositioner.java:130)
    at org.fxmisc.flowless.CellPositioner.placeStartAt(CellPositioner.java:95)
    at org.fxmisc.flowless.Navigator.placeStartAtMayCrop(Navigator.java:183)
    at org.fxmisc.flowless.Navigator.visit(Navigator.java:111)
    at org.fxmisc.flowless.StartOffStart.accept(TargetPosition.java:49)
    at org.fxmisc.flowless.Navigator.layoutChildren(Navigator.java:67)
    at javafx.scene.Parent.layout(Parent.java:1087)
    at org.fxmisc.flowless.VirtualFlow.layoutChildren(VirtualFlow.java:165)
    at javafx.scene.Parent.layout(Parent.java:1087)
    at org.fxmisc.flowless.VirtualFlow.visibleCells(VirtualFlow.java:138)
    at com.myproject.util.javafx.codearea.SEditor.<init>(SEditor.java:659)
    at com.myproject.util.javafx.codearea.SEditor.<init>(SEditor.java:607)
    at com.myproject.util.javafx.codearea.SCodeArea.<init>(SCodeArea.java:122)
    at com.myproject.meditor.SLICodeArea.<init>(SLICodeArea.java:124)
    at com.myproject.meditor.SLICodeArea.<init>(SLICodeArea.java:114)
    at com.myproject.meditor.SLItemCodeArea.<init>(SLICodeArea.java:106)
    at com.myproject.meditor.SLItemCodeArea.<init>(SLICodeArea.java:103)
    at com.myproject.meditor.SLIVCodeAreaTest.<clinit>(SLIVCodeAreaTest.java:14)

EDIT: 2

From the stack trace, the part of code that triggered the exception (SLIVCodeAreaTest.java:14) is in the declaration of private static final SLIVCodeArea in the part of code :

import static org.junit.Assert.assertTrue;
import org.junit.Test;

public class SLIVCodeAreaTest {     
    private static final SLIVCodeArea sEditor = new SLIVCodeArea(new SLICodeArea()) {

        @Override protected void updateVisibleParagraphRange() {}   };

    private static final VEditorProblemList sProblemList = 
        new VEditorProblemList(sEditor, new SimpleObjectProperty<>(), false);

    static { sEditor.aggregatedTextChanges().setAggregationEnabled(false); }

Edit : 3

If I remove the keyword static from the initialisation part above , the stacktrace of the error becomes :

Running com.myproject.meditor.SLIVCodeAreaTest
Tests run: 17, Failures: 0, Errors: 17, Skipped: 0, Time elapsed: 1.124 sec <<< FAILURE! - in Running com.myproject.meditor.SLIVCodeAreaTest
testRHBlock(com.myproject.meditor.SLIVCodeAreaTest)  Time elapsed: 0 sec  <<< ERROR!
java.lang.RuntimeException: Internal graphics not initialized yet
    at com.sun.glass.ui.Screen.getScreens(Screen.java:70)
    at com.sun.glass.ui.Screen.getMainScreen(Screen.java:61)
    at com.sun.javafx.font.PrismFontFactory.getSystemFontSize(PrismFontFactory.java:1911)
    at com.sun.javafx.font.PrismFontLoader.getSystemFontSize(PrismFontLoader.java:240)
    at javafx.scene.text.Font.getDefaultSystemFontSize(Font.java:71)
    at javafx.scene.text.Font.getDefault(Font.java:86)
    at javafx.scene.text.Text.getFont(Text.java:478)
    at javafx.scene.text.Text.getFontInternal(Text.java:487)
    at javafx.scene.text.Text.access$100(Text.java:95)
    at javafx.scene.text.Text$1.getFont(Text.java:206)
    at com.sun.javafx.text.GlyphLayout.breakRuns(GlyphLayout.java:174)
    at com.sun.javafx.text.PrismTextLayout.buildRuns(PrismTextLayout.java:770)
    at com.sun.javafx.text.PrismTextLayout.layout(PrismTextLayout.java:1021)
    at com.sun.javafx.text.PrismTextLayout.ensureLayout(PrismTextLayout.java:223)
    at com.sun.javafx.text.PrismTextLayout.getBounds(PrismTextLayout.java:246)
    at javafx.scene.text.TextFlow.computePrefWidth(TextFlow.java:203)
    at javafx.scene.Parent.prefWidth(Parent.java:915)
    at javafx.scene.layout.Region.prefWidth(Region.java:1419)
    at org.fxmisc.richtext.ParagraphBox.computePrefWidth(ParagraphBox.java:199)
    at org.fxmisc.richtext.ParagraphBox.computeMinWidth(ParagraphBox.java:191)
    at javafx.scene.Parent.minWidth(Parent.java:943)
    at javafx.scene.layout.Region.minWidth(Region.java:1383)
    at org.fxmisc.flowless.VerticalHelper.minBreadth(OrientationHelper.java:234)
    at org.fxmisc.flowless.OrientationHelper.minBreadth(OrientationHelper.java:44)
    at org.reactfx.collection.MappedList.get(MappedList.java:27)
    at org.reactfx.collection.MemoizationListImpl.force(MemoizationList.java:121)
    at org.fxmisc.flowless.SizeTracker.breadthFor(SizeTracker.java:161)
    at org.fxmisc.flowless.CellPositioner.getSizedCell(CellPositioner.java:130)
    at org.fxmisc.flowless.CellPositioner.placeStartAt(CellPositioner.java:95)
    at org.fxmisc.flowless.Navigator.placeStartAtMayCrop(Navigator.java:183)
    at org.fxmisc.flowless.Navigator.visit(Navigator.java:111)
    at org.fxmisc.flowless.StartOffStart.accept(TargetPosition.java:49)
    at org.fxmisc.flowless.Navigator.layoutChildren(Navigator.java:67)
    at javafx.scene.Parent.layout(Parent.java:1087)
    at org.fxmisc.flowless.VirtualFlow.layoutChildren(VirtualFlow.java:165)
    at javafx.scene.Parent.layout(Parent.java:1087)
    at org.fxmisc.flowless.VirtualFlow.visibleCells(VirtualFlow.java:138)
    at com.myproject.util.javafx.codearea.SEditor.<init>(SEditor.java:659)
    at com.myproject.util.javafx.codearea.SEditor.<init>(SEditor.java:607)
    at com.myproject.util.javafx.codearea.SCodeArea.<init>(SCodeArea.java:122)
    at com.myproject.meditor.SLICodeArea.<init>(SLICodeArea.java:124)
    at com.myproject.meditor.SLICodeArea.<init>(SLICodeArea.java:114)
    at com.myproject.meditor.SLICodeArea.<init>(SLICodeArea.java:106)
    at com.myproject.meditor.SLICodeArea.<init>(SLICodeArea.java:103)
    at com.myproject.meditor.SLIVCodeAreaTest.<init>(SLIVCodeAreaTest.java:14)

PS : The test worked in OSX with and without static keyword.

The same code works fine in Linux and MacOS, but fails in windows. Does anyone have an idea why ?

Please include the *entire* stack trace in your question. What line of code did you invoke that triggered the exception? — VGR, Sep 04 '17 at 01:02
screens is a global or local variable ? and i think that your method _staticScreaan_getScreens_ returns null so your table has null elements. — Menai Ala Eddine - Aladdin, Sep 04 '17 at 02:33
@VGR see Edit : 1 , Edit : 2 and Edit : 3 , I have added the stacktrace with the part of code that triggered the exception. — josephino, Sep 04 '17 at 23:48
In all likelihood, hannoveraner is partly correct. JavaFX simply will not work unless a javafx.application.Application instance has been initialized (by JavaFX, not by you). You probably need to call [Application.launch](https://docs.oracle.com/javase/8/javafx/api/javafx/application/Application.html#launch-java.lang.Class-java.lang.String...-) from a method annotated with `@Before`. — VGR, Sep 05 '17 at 00:38

score 0 · Answer 1 · answered Sep 03 '17 at 19:05

0

The combination of JavaFX, JUnit and any java.lang.ExceptionInInitializerError is an indicator of an suppressed occurrence of the exception Toolkit not initialized.

To initialise JavaFX you may wait for new JFXPanel() to finish before running the unit test.

See:

JavaFX 2.1: Toolkit not initialized

answered Sep 03 '17 at 19:05

If the exception _Toolkit not initialized_ has occured, why it doesn't occur in MacOS or Linux ? – josephino Sep 03 '17 at 19:12
May depend on the JRE-Version used on MacOS, Linux or Windows. – Sep 03 '17 at 19:18
What is a “suppressed occurrence” of an exception? What leads you to believe this is a symptom of an uninitialized JavaFX Application? I see nothing in the linked SO question which mentions any of the classes in the question’s stack trace. – VGR Sep 04 '17 at 01:04

score 0 · Answer 2 · answered Sep 04 '17 at 02:50

According to Class ExceptionInInitializerError

public class ExceptionInInitializerError extends LinkageError Signals that an unexpected exception has occurred in a static initializer. An ExceptionInInitializerError is thrown to indicate that an exception occurred during evaluation of a static initializer or the initializer for a static variable.

Because you did not post a Minimal, Complete, and Verifiable example. I think because newscreens is not static or is initialized by null,and you tried to transfer nullvariable to array.

Couldn't produce a Minimal Complete example as there a lot of dependencies, you are right about the fact that an exception has occurred during evaluation of a static initialiser, see my edits above — josephino, Sep 04 '17 at 23:52

JavaFX Test That fails in Windows and works in OSX and Linux

2 Answers2

Linked