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from rdflib import Graph
from rdflib.term import BNode, URIRef, rdflib_skolem_genid
def test():
"""Test skolemised URI query retrieves expected results.
Issue: https://github.com/RDFLib/rdflib/issues/1808
"""
g = Graph()
g.parse(data='[] <urn:prop> "val" .', format="turtle")
for s, p, o in g:
assert isinstance(s, BNode)
gs = g.skolemize()
for s, p, o in gs:
assert isinstance(s, URIRef) and s.__contains__(rdflib_skolem_genid)
query_with_iri = "select ?p ?o {{ <{}> ?p ?o }}".format(s)
query_for_all = "select ?s ?p ?o { ?s ?p ?o }"
count = 0
for row in gs.query(query_with_iri):
count += 1
assert count == 1
count = 0
for row in gs.query(query_for_all):
count += 1
assert count == 1
gp = Graph()
gp.parse(data=gs.serialize(format="turtle"), format="turtle")
count = 0
for row in gp.query(query_with_iri):
count += 1
assert count == 1
count = 0
for row in gp.query(query_for_all):
count += 1
assert count == 1
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