test_virtual_columns.py 文件源码

def test_all_triples_with_row_numbers():
    csvw = CSVW(csv_path='tests/virtual1.csv',
                metadata_path='tests/virtual1.csv-metadata.json')
    rdf_output = csvw.to_rdf()
    g = ConjunctiveGraph()
    g.parse(data=rdf_output, format="turtle")

    all_subjects = {x for x in g.subjects()}
    assert len(all_subjects) == 4

    ns = Namespace("http://example.org/")
    assert ns['sub-1'] in all_subjects
    assert ns['sub-2'] in all_subjects
    assert len([g.triples((ns['sub-1'], ns['obj-1'], ns['pred-1']))]) == 1
    assert len([g.triples((ns['sub-2'], ns['obj-2'], ns['pred-2']))]) == 1