Index: trunk/test/data/regress/20110/data.osm
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--- trunk/test/data/regress/20110/data.osm (revision 17343)
+++ trunk/test/data/regress/20110/data.osm (revision 17343)
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Index: trunk/test/unit/org/openstreetmap/josm/actions/CreateMultipolygonActionTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/actions/CreateMultipolygonActionTest.java (revision 17341)
+++ trunk/test/unit/org/openstreetmap/josm/actions/CreateMultipolygonActionTest.java (revision 17343)
@@ -4,4 +4,5 @@
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertTrue;
@@ -12,6 +13,6 @@
import java.util.TreeMap;
+import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.RegisterExtension;
-import org.junit.jupiter.api.Test;
import org.openstreetmap.josm.TestUtils;
import org.openstreetmap.josm.command.SequenceCommand;
@@ -156,3 +157,20 @@
}
+
+ /**
+ * Non-regression test for Bug #20110.
+ * @throws Exception if an error occurs
+ */
+ @Test
+ void testTicket20110() throws Exception {
+ DataSet ds = OsmReader.parseDataSet(TestUtils.getRegressionDataStream(20110, "data.osm"), null);
+ assertEquals(1, ds.getRelations().size());
+ Relation mp = ds.getRelations().iterator().next();
+ assertEquals("wetland", mp.get("natural"));
+ long numCoastlineWays = ds.getWays().stream().filter(w -> "coastline".equals(w.get("natural"))).count();
+ Relation modMp = createMultipolygon(ds.getWays(), "type:way", mp, false);
+ assertNotNull(modMp);
+ assertEquals("wetland", modMp.get("natural"));
+ assertEquals(numCoastlineWays, ds.getWays().stream().filter(w -> "coastline".equals(w.get("natural"))).count());
+ }
}