Index: trunk/test/unit/org/openstreetmap/josm/gui/dialogs/relation/sort/WayConnectionTypeCalculatorTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/gui/dialogs/relation/sort/WayConnectionTypeCalculatorTest.java	(revision 11885)
+++ trunk/test/unit/org/openstreetmap/josm/gui/dialogs/relation/sort/WayConnectionTypeCalculatorTest.java	(revision 11886)
@@ -5,4 +5,5 @@
 import java.io.IOException;
 import java.io.InputStream;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -97,4 +98,10 @@
 
     @Test
+    public void testEmpty() {
+        String actual = getConnections(wayConnectionTypeCalculator.updateLinks(new ArrayList<>()));
+        Assert.assertEquals("[]", actual);
+    }
+
+    @Test
     public void testGeneric() {
         Relation relation = getRelation("generic");