Index: trunk/test/unit/org/openstreetmap/josm/tools/GeometryTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/tools/GeometryTest.java	(revision 13710)
+++ trunk/test/unit/org/openstreetmap/josm/tools/GeometryTest.java	(revision 13712)
@@ -5,4 +5,5 @@
 
 import java.io.FileInputStream;
+import java.util.Arrays;
 import java.util.List;
 
@@ -145,3 +146,16 @@
         assertEquals(162.66381817961337, angle, 1e-5);
     }
+
+    /**
+     * Test of {@link Geometry#getCentroidEN} method.
+     */
+    @Test
+    public void testCentroidEN() {
+        EastNorth en1 = new EastNorth(100, 200);
+        EastNorth en2 = new EastNorth(150, 400);
+        EastNorth en3 = new EastNorth(200, 200);
+        assertEquals(en1, Geometry.getCentroidEN(Arrays.asList(en1)));
+        assertEquals(new EastNorth(125, 300), Geometry.getCentroidEN(Arrays.asList(en1, en2)));
+        assertEquals(new EastNorth(150, 266d + 2d/3d), Geometry.getCentroidEN(Arrays.asList(en1, en2, en3)));
+    }
 }