modules/javafx.graphics/src/test/java/test/javafx/scene/text/TextTest.java

@@ -1,7 +1,7 @@
  /*
-  * Copyright (c) 2010, 2015, Oracle and/or its affiliates. All rights reserved.
+  * Copyright (c) 2010, 2019, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this

@@ -25,15 +25,22 @@
  
  package test.javafx.scene.text;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertFalse;
+ import static org.junit.Assert.assertTrue;
  import static org.junit.Assert.assertNotNull;
  import javafx.geometry.VPos;
  import test.javafx.scene.NodeTest;
  import javafx.scene.text.Font;
  import javafx.scene.text.Text;
+ import javafx.scene.layout.HBox;
+ import javafx.scene.Scene;
+ import javafx.stage.Stage;
+ 
+ import test.com.sun.javafx.pgstub.StubToolkit;
+ import com.sun.javafx.tk.Toolkit;
  
  import org.junit.Test;
  
  public class TextTest {
  

@@ -223,6 +230,43 @@
      @Test public void toStringShouldReturnNonEmptyString() {
          String s = new Text().toString();
          assertNotNull(s);
          assertFalse(s.isEmpty());
      }
+ 
+     // Test for JDK-8130738
+     @Test public void testTabSize() {
+         Toolkit tk = (StubToolkit)Toolkit.getToolkit();
+         HBox root = new HBox();
+         Scene scene = new Scene(root);
+         Stage stage = new Stage();
+         stage.setScene(scene);
+         stage.setWidth(300);
+         stage.setHeight(200);
+ 
+         try {
+             Text text = new Text("\tHello");
+             root.getChildren().addAll(text);
+             stage.show();
+             tk.firePulse();
+             assertEquals(text.getTabSize(),8);
+             // initial width with default 8-space tab
+             double widthT8 = text.getBoundsInLocal().getWidth();
+             text.setTabSize(1);
+             tk.firePulse();
+             // width with tab at 1 spaces
+             double widthT1 = text.getBoundsInLocal().getWidth();
+             // approximate width of a single space
+             double widthSpace = (widthT8 - widthT1) / 7;
+             assertTrue(widthSpace > 0);
+             text.setTabSize(4);
+             tk.firePulse();
+             // width with tab at 4 spaces
+             double widthT4 = text.getBoundsInLocal().getWidth();
+             double expected = widthT8 - 4 * widthSpace;
+             // should be approximately 4 space-widths shorter
+             assertEquals(expected, widthT4, 0.5);
+         } finally {
+             stage.hide();
+         }
+   }
  }