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import pytest
from rdflib import Graph, Namespace
"""Tests the Graph class' cbd() function"""
EX = Namespace("http://ex/")
@pytest.fixture
def get_graph():
g = Graph()
# adding example data for testing
g.parse(
data="""
PREFIX ex: <http://ex/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
ex:R1
a rdf:Resource ;
ex:hasChild ex:R2 , ex:R3 .
ex:R2
ex:propOne ex:P1 ;
ex:propTwo ex:P2 .
ex:R3
ex:propOne ex:P3 ;
ex:propTwo ex:P4 ;
ex:propThree [
a rdf:Resource ;
ex:propFour "Some Literal" ;
ex:propFive ex:P5 ;
ex:propSix [
ex:propSeven ex:P7 ;
] ;
] .
""",
format="turtle",
)
g.bind("ex", EX)
yield g
g.close()
def testCbd(get_graph):
g = get_graph
assert len(g.cbd(EX.R1)) == 3, "cbd() for R1 should return 3 triples"
assert len(g.cbd(EX.R2)) == 2, "cbd() for R3 should return 2 triples"
assert len(g.cbd(EX.R3)) == 8, "cbd() for R3 should return 8 triples"
assert len(g.cbd(EX.R4)) == 0, "cbd() for R4 should return 0 triples"
def testCbdReified(get_graph):
g = get_graph
# add some reified triples to the testing graph
g.parse(
data="""
PREFIX ex: <http://ex/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
ex:R5
ex:propOne ex:P1 ;
ex:propTwo ex:P2 ;
ex:propRei ex:Pre1 .
ex:S
a rdf:Statement ;
rdf:subject ex:R5 ;
rdf:predicate ex:propRei ;
rdf:object ex:Pre1 ;
ex:otherReiProp ex:Pre2 .
""",
format="turtle",
)
# this cbd() call should get the 3 basic triples with ex:R5 as subject as well as 5 more from the reified
# statement
assert len(g.cbd(EX.R5)) == (3 + 5), "cbd() for R5 should return 8 triples"
# add crazy reified triples to the testing graph
g.parse(
data="""
PREFIX ex: <http://ex/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
ex:R6
ex:propOne ex:P1 ;
ex:propTwo ex:P2 ;
ex:propRei ex:Pre1 .
ex:S1
a rdf:Statement ;
rdf:subject ex:R6 ;
rdf:predicate ex:propRei ;
rdf:object ex:Pre1 ;
ex:otherReiProp ex:Pre3 .
ex:S2
rdf:subject ex:R6 ;
rdf:predicate ex:propRei2 ;
rdf:object ex:Pre2 ;
ex:otherReiProp ex:Pre4 ;
ex:otherReiProp ex:Pre5 .
""",
format="turtle",
)
assert len(g.cbd(EX.R6)) == (3 + 5 + 5), "cbd() for R6 should return 12 triples"
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