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

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2012, 2016, Oracle and/or its affiliates. All rights reserved.
+ * 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

@@ -27,13 +27,15 @@
 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;

@@ -78,10 +80,25 @@
         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) {