@pytest.fixture(params=['tests/dataset-rdstmc', 'tests/dataset-wiki', 'tests/dataset-rntutor'])
def datasetdir(request):
    return py.path.local(request.param)
@pytest.fixture(params=['tests/dataset-rdstmc', 'tests/dataset-wiki', 'tests/dataset-rntutor'])
def datasetdir(request):
    return py.path.local(request.param)