tests/system/src/test/java/test/robot/javafx/scene/layout/RegionUITestBase.java

*** 1,7 ****
  /*
!  * Copyright (c) 2012, 2016, 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
--- 1,7 ----
  /*
!  * Copyright (c) 2012, 2018, 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
*** 27,39 ****
--- 27,41 ----
  import javafx.scene.Group;
  import javafx.scene.Scene;
  import javafx.scene.paint.Color;
  import javafx.scene.paint.Paint;
  import javafx.stage.Stage;
+ import javafx.stage.Window;
  import java.util.ArrayList;
  import java.util.LinkedList;
  import java.util.List;
+ import java.util.concurrent.atomic.AtomicBoolean;
  import java.util.concurrent.atomic.AtomicReference;
  import javafx.scene.layout.Background;
  import javafx.scene.layout.BackgroundFill;
  import javafx.scene.layout.Border;
  import javafx.scene.layout.CornerRadii;
*** 78,87 ****
--- 80,104 ----
          waitFirstFrame();
      }
  
      static final double TOLERANCE = 0.07;
  
+     protected boolean checkIntegralUIScale() {
+         AtomicBoolean integralUIScale = new AtomicBoolean(false);
+         runAndWait(() -> {
+             Window window = scene.getWindow();
+             double outScaleX = window.getOutputScaleX();
+             double outScaleY = window.getOutputScaleY();
+ 
+             if (outScaleX == Math.rint(outScaleX)
+                     && outScaleY == Math.rint(outScaleY)) {
+                 integralUIScale.set(true);
+             }
+         });
+         return integralUIScale.get();
+     }
+ 
      protected void assertColorEquals(Color expected, int x, int y, double tolerance) {
          Color actual = getColorThreadSafe(x, y);
          try {
              assertColorEquals(expected, actual, tolerance);
          } catch (AssertionError error) {