【问题标题】:JavaFX Test That fails in Windows and works in OSX and LinuxJavaFX 测试在 Windows 中失败并在 OSX 和 Linux 中工作
【发布时间】:2018-02-12 01:59:06
【问题描述】:

我有一个 JavaFX 测试,它只在 windows 中失败,但在 OSX 和 Linux 中运行良好

这是堆栈跟踪:

编辑: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)

编辑:2

从堆栈跟踪来看,触发异常(SLIVCodeAreaTest.java:14)的部分代码在代码部分private static final SLIVCodeArea的声明中:

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); }

编辑:3

如果我从上面的初始化部分中删除关键字 static ,则错误的堆栈跟踪变为:

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 : 测试在 OSX 中使用和不使用 static 关键字。

相同的代码在 Linux 和 MacOS 中运行良好,但在 Windows 中失败。 有谁知道为什么?

【问题讨论】:

  • 创建并发布minimal reproducible example
  • 请在您的问题中包含 整个 堆栈跟踪。您调用了哪一行代码触发了异常?
  • screens 是全局变量还是局部变量?我认为你的方法 staticScreaan_getScreens 返回 null 所以你的表有 null 元素。
  • @VGR 见 Edit : 1 , Edit : 2 和 Edit : 3 ,我已经添加了堆栈跟踪以及触发异常的部分代码。
  • 很可能,hannoveraner 部分正确。除非已初始化 javafx.application.Application 实例(由 JavaFX,而不是您),否则 JavaFX 根本无法工作。您可能需要从带有@Before 注释的方法中调用Application.launch

标签: java linux windows macos javafx


【解决方案1】:

JavaFXJUnit 和任何java.lang.ExceptionInInitializerError 的组合表明异常Toolkit not initialized 的发生被抑制。

要初始化 JavaFX,您可以等待 new JFXPanel() 完成,然后再运行单元测试。

见:

【讨论】:

  • 如果出现Toolkit not initialized异常,为什么在MacOS或Linux下没有出现?
  • 可能取决于 MacOS、Linux 或 Windows 上使用的 JRE 版本。
  • 什么是异常的“抑制发生”?是什么让您相信这是未初始化的 JavaFX 应用程序的症状?我在链接的 SO 问题中看不到任何提及问题堆栈跟踪中的任何类的内容。
【解决方案2】:

根据Class ExceptionInInitializerError

公共类 ExceptionInInitializerError 扩展了 LinkageError 信号 静态初始化程序中发生了意外异常。一个 抛出 ExceptionInInitializerError 表示异常 在评估静态初始化程序或初始化程序期间发生 对于静态变量。

因为你没有发布 Minimal, Complete, and Verifiable example. 我认为是因为 newscreens 不是static 或由null 初始化,而您尝试将nullvariable 转移到数组。

【讨论】:

  • 无法生成最小完整示例,因为存在很多依赖项,您对在评估静态初始化程序期间发生异常的事实是正确的,请参阅上面的编辑
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