added degenerated ring test

citygml4j-quality-ade/src/test/java/de/hft/stuttgart/quality/QualityAdeTests.java

@@ -378,6 +378,22 @@ class QualityAdeTests {
 		byte[] buf = writeModel(model);
 		assertTrue(validate(new ByteArrayInputStream(buf)));
 	}
+	
+	@Test
+	void testRingSelfIntersectionErrorDegenerateRing() throws ADEException, CityGMLContextException, CityGMLWriteException,
+			SAXException, IOException, SchemaHandlerException {
+		CityModel model = new CityModel();
+		ValidationResult res = fillCityModel(model);
+
+		RingSelfIntersectionError err = new RingSelfIntersectionError();
+		err.setLinearRingId("ringId");
+		err.setType(RingSelfIntType.DEGENERATED_RING);
+		err.setVertex1(new DirectPosition(1, 2, 3));
+		res.getErrors().add(new AbstractErrorProperty(err));
+
+		byte[] buf = writeModel(model);
+		assertTrue(validate(new ByteArrayInputStream(buf)));
+	}
 
 	@Test
 	void testRingTooFewPointsError() throws ADEException, CityGMLContextException, CityGMLWriteException, SAXException,