PythonNature nature = createNature(TestDependent.TEST_PYSRC_NAVIGATOR_LOC + "projroot/source/python");
project = new ProjectStub(new File(TestDependent.TEST_PYSRC_NAVIGATOR_LOC + "projroot"), nature);
provider = new PythonModelProvider();
PipelinedViewerUpdate update = new PipelinedViewerUpdate();
Set<Object> refreshTargets = update.getRefreshTargets();
refreshTargets.add(project);
refreshTargets.add(null);
refreshTargets.add("string");
provider.interceptRefresh(update);
assertEquals(2, refreshTargets.size());