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from rdflib import BNode, Literal, Graph, Namespace
from rdflib.compare import isomorphic
EX = Namespace("http://example.org/")
QUERY = """
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT ?x (%s(?y) as ?ys) (%s(?z) as ?zs) WHERE {
VALUES (?x ?y ?z) {
(2 6 UNDEF)
(2 UNDEF 10)
(3 UNDEF 15)
(3 9 UNDEF)
(5 UNDEF 25)
}
}
GROUP BY ?x
"""
def test_sample():
g = Graph()
results = set(tuple(i) for i in g.query(QUERY % ("SAMPLE", "SAMPLE")))
assert results == set(
[
(Literal(2), Literal(6), Literal(10)),
(Literal(3), Literal(9), Literal(15)),
(Literal(5), None, Literal(25)),
]
)
def test_count():
g = Graph()
results = set(tuple(i) for i in g.query(QUERY % ("COUNT", "COUNT")))
assert results == set(
[
(Literal(2), Literal(1), Literal(1)),
(Literal(3), Literal(1), Literal(1)),
(Literal(5), Literal(0), Literal(1)),
]
)
if __name__ == "__main__":
test_sample()
test_count()
|
