Index: trunk/test/unit/org/openstreetmap/josm/gui/mappaint/mapcss/MapCSSParserTest.groovy
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/gui/mappaint/mapcss/MapCSSParserTest.groovy	(revision 8775)
+++ trunk/test/unit/org/openstreetmap/josm/gui/mappaint/mapcss/MapCSSParserTest.groovy	(revision 8784)
@@ -10,4 +10,5 @@
 import org.openstreetmap.josm.data.osm.DataSet
 import org.openstreetmap.josm.data.osm.OsmUtils
+import org.openstreetmap.josm.data.osm.Node
 import org.openstreetmap.josm.data.osm.Way
 import org.openstreetmap.josm.gui.mappaint.Environment
@@ -231,4 +232,31 @@
 
     @Test
+    public void testParentTag() throws Exception {
+        def c1 = getParser("way[foo] > node[tag(\"foo\")=parent_tag(\"foo\")] {}").child_selector()
+        def ds = new DataSet()
+        def w1 = new Way()
+        def w2 = new Way()
+        def n1 = new Node(new LatLon(1, 1))
+        def n2 = new Node(new LatLon(2, 2))
+        w1.put("foo", "123")
+        w2.put("foo", "123")
+        n1.put("foo", "123")
+        n2.put("foo", "0")
+        ds.addPrimitive(w1)
+        ds.addPrimitive(n1)
+        ds.addPrimitive(n2)
+        w1.addNode(n1)
+        w2.addNode(n2)
+        assert c1.matches(new Environment(n1))
+        assert !c1.matches(new Environment(n2))
+        assert !c1.matches(new Environment(w1))
+        assert !c1.matches(new Environment(w2))
+        n1.put("foo", "0")
+        assert !c1.matches(new Environment(n1))
+        n1.put("foo", "123")
+        assert c1.matches(new Environment(n1))
+    }
+
+    @Test
     public void testTicket8568() throws Exception {
         def sheet = new MapCSSStyleSource("" +