set gmlid before copy

CityDoctorParent/CityDoctorModel/src/test/java/de/hft/stuttgart/citydoctor2/utils/CopyTest.java

@@ -26,12 +26,14 @@ import org.junit.Test;
 import de.hft.stuttgart.citydoctor2.datastructure.Geometry;
 import de.hft.stuttgart.citydoctor2.datastructure.GeometryTestUtils;
 import de.hft.stuttgart.citydoctor2.datastructure.GeometryType;
+import de.hft.stuttgart.citydoctor2.datastructure.GmlId;
 
 public class CopyTest {
 	
 	@Test
 	public void testCopy() {
 		Geometry geometry = GeometryTestUtils.createDummyGeometry(GeometryType.COMPOSITE_SURFACE);
+		geometry.setGmlId(new GmlId("test"));
 		Geometry copy = Copy.copy(geometry);
 		assertEquals(geometry.getType(), copy.getType());
 		assertEquals(geometry.getLod(), copy.getLod());