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from rdflib import Graph, Namespace
from rdflib.namespace import RDF
import sys
from pathlib import Path
sys.path.append(str(Path(__file__).parent.parent))
import owlrl
RELS = Namespace("http://example.org/relatives#")
def test_basic():
# create an RDF graph, load a simple OWL ontology and data
g = Graph()
try:
g.parse("relatives.ttl", format="turtle")
except FileNotFoundError:
# This test might be run from the parent directory root
g.parse("test/relatives.ttl", format="turtle")
# count no. rels:Person class instances, no inferencing, should find 14 results (one Child)
cnt = 0
for _ in g.subjects(predicate=RDF.type, object=RELS.Person):
cnt += 1
assert cnt == 14
# count no. of hasGrandparent predicates, no inferencing, should find 0 results
cnt = 0
for _ in g.subject_objects(predicate=RELS.hasGrandparent):
cnt += 1
assert cnt == 0
# expand the graph with OWL-RL semantics
owlrl.DeductiveClosure(owlrl.OWLRL_Semantics).expand(g)
# count no. rels:Person class instances, after inferencing, should find 15 results
cnt = 0
for _ in g.subjects(predicate=RDF.type, object=RELS.Person):
cnt += 1
assert cnt == 15
# count no. of hasGrandparent predicates, after inferencing, should find 7 results
cnt = 0
for _ in g.subject_objects(predicate=RELS.hasGrandparent):
cnt += 1
assert cnt == 7
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