@Test
public void testListGraph(){
TcProvider provider = getInstance();
//No union graph in listMGraphs
Set<UriRef> mgl = provider.listMGraphs();
Assert.assertFalse("Mgraph list don't contain the read-only union-graph", mgl.contains(UNION_GRAPH_NAME));
//Union graph in listGraphs
Set<UriRef> gl = provider.listGraphs();
Assert.assertTrue("Graph list contain the read-only union-graph", gl.contains(UNION_GRAPH_NAME));
}