@Test public void dataset_05()
{
String graphName = "http://example/" ;
Dataset ds = createFixed() ;
ds.addNamedModel(graphName, model1) ;
ds.replaceNamedModel(graphName, model2) ;
assertTrue(ds.containsNamedModel(graphName)) ;
List<String> x = Iter.toList(ds.listNames()) ;
assertEquals(1, x.size()) ;
assertEquals(graphName, x.get(0)) ;