@Test
 public void testGetVersionList() {
   when(mockRequest.selectVariant(POSSIBLE_RDF_VARIANTS)).thenReturn(mockVariant);
   when(mockNodes.find(any(Session.class), anyString())).thenReturn(mockResource);
   when(mockResource.getTriples(any(IdentifierConverter.class), eq(VersionsRdfContext.class)))
       .thenReturn(mockRdfStream);
   when(mockResource.isVersioned()).thenReturn(true);
   when(mockVariant.getMediaType()).thenReturn(new MediaType("text", "turtle"));
   final RdfStream response = testObj.getVersionList();
   assertEquals("Got wrong RdfStream!", mockRdfStream, response);
 }