Index: trunk/test/unit/org/openstreetmap/josm/io/GeoJSONWriterTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/io/GeoJSONWriterTest.java	(revision 16935)
+++ trunk/test/unit/org/openstreetmap/josm/io/GeoJSONWriterTest.java	(revision 16936)
@@ -40,4 +40,5 @@
         node.put("name", "foo");
         node.put("source", "code");
+        node.put("data", "{\"foo\": 1, \"bar\": \"baz\"}");
         final DataSet ds = new DataSet();
         ds.addPrimitive(node);
@@ -52,5 +53,9 @@
                 "            'properties': {\n" +
                 "                'name': 'foo',\n" +
-                "                'source': 'code'\n" +
+                "                'source': 'code',\n" +
+                "                'data': {\n" +
+                "                    'foo': 1,\n" +
+                "                    'bar': 'baz'\n" +
+                "                }\n" +
                 "            },\n" +
                 "            'geometry': {\n" +