test_formats.py 文件源码

def verify_rdf_contents(contents, fmt):
    g = ConjunctiveGraph()
    g.parse(data=contents, format=fmt)

    books = Namespace('http://www.books.org/')
    isbn = Namespace("http://www.books.org/isbn/")

    # Check number of all triples
    assert sum(1 for _ in g.triples((None, None, None))) == NUM_SUBJECTS * NUM_TRIPLES_PER_SUBJ

    # Check number of subject
    subjs = set(g.subjects())
    expected_subjs = ["0062316095", "0374532508", "1610391845", "0374275637"]
    assert len(subjs) == len(expected_subjs)
    for s in expected_subjs:
        assert isbn[s] in subjs

        # Verify isbn number is positive integer
        s_isbn = list(g.triples((isbn[s], books['isbnnumber'], None)))
        assert len(s_isbn) == 1
        s_isbn_val = s_isbn[0][2]
        assert isinstance(s_isbn_val, Literal)
        assert s_isbn_val.datatype == XSD.positiveInteger
        # Verify pages is a unsignedShort
        s_page = list(g.triples((isbn[s], books['pagecount'], None)))
        assert len(s_page) == 1
        s_page_val = s_page[0][2]
        assert isinstance(s_page_val, Literal)
        assert s_page_val.datatype == XSD.unsignedShort
        # Verify hardcover is a boolean
        s_hardcover = list(g.triples((isbn[s], books['hardcover'], None)))
        assert len(s_hardcover) == 1
        s_hardcover_val = s_hardcover[0][2]
        assert isinstance(s_hardcover_val, Literal)
        assert s_hardcover_val.datatype == XSD.boolean
        # Verify price is a decimal
        s_price = list(g.triples((isbn[s], books['price'], None)))
        assert len(s_price) == 1
        s_price_val = s_price[0][2]
        assert isinstance(s_price_val, Literal)
        assert s_price_val.datatype == XSD.decimal