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# -*- coding: utf-8 -*-
import unittest
import re
from rdflib import ConjunctiveGraph, URIRef, Literal, BNode, Graph
from urllib.request import urlopen
HOST = "http://localhost:3031"
DB = "/db/"
# this assumes SPARQL1.1 query/update endpoints running locally at
# http://localhost:3031/db/
#
# The ConjunctiveGraph tests below require that the SPARQL endpoint renders its
# default graph as the union of all known graphs! This is incompatible with the
# endpoint behavior required by our Dataset tests in test_dataset.py, so you
# need to run a second SPARQL endpoint on a non standard port,
# e.g. fuseki started with:
# ./fuseki-server --port 3031 --memTDB --update --set tdb:unionDefaultGraph=true /db
# THIS WILL DELETE ALL DATA IN THE /db dataset
michel = URIRef("urn:michel")
tarek = URIRef("urn:tarek")
bob = URIRef("urn:bob")
likes = URIRef("urn:likes")
hates = URIRef("urn:hates")
pizza = URIRef("urn:pizza")
cheese = URIRef("urn:cheese")
graphuri = URIRef("urn:graph")
othergraphuri = URIRef("urn:othergraph")
try:
assert len(urlopen(HOST).read()) > 0
skip = False
except:
skip = True
@unittest.skipIf(skip, HOST + " is unavailable.")
class TestSparql11(unittest.TestCase):
def setUp(self):
self.longMessage = True
self.graph = ConjunctiveGraph("SPARQLUpdateStore")
root = HOST + DB
self.graph.open((root + "sparql", root + "update"))
# clean out the store
for c in self.graph.contexts():
c.remove((None, None, None))
assert len(c) == 0
def tearDown(self):
self.graph.close()
def testSimpleGraph(self):
g = self.graph.get_context(graphuri)
g.add((tarek, likes, pizza))
g.add((bob, likes, pizza))
g.add((bob, likes, cheese))
g2 = self.graph.get_context(othergraphuri)
g2.add((michel, likes, pizza))
self.assertEqual(3, len(g), "graph contains 3 triples")
self.assertEqual(1, len(g2), "other graph contains 1 triple")
r = g.query("SELECT * WHERE { ?s <urn:likes> <urn:pizza> . }")
self.assertEqual(2, len(list(r)), "two people like pizza")
r = g.triples((None, likes, pizza))
self.assertEqual(2, len(list(r)), "two people like pizza")
# Test initBindings
r = g.query(
"SELECT * WHERE { ?s <urn:likes> <urn:pizza> . }", initBindings={"s": tarek}
)
self.assertEqual(1, len(list(r)), "i was asking only about tarek")
r = g.triples((tarek, likes, pizza))
self.assertEqual(1, len(list(r)), "i was asking only about tarek")
r = g.triples((tarek, likes, cheese))
self.assertEqual(0, len(list(r)), "tarek doesn't like cheese")
g2.add((tarek, likes, pizza))
g.remove((tarek, likes, pizza))
r = g.query("SELECT * WHERE { ?s <urn:likes> <urn:pizza> . }")
self.assertEqual(1, len(list(r)), "only bob likes pizza")
def testConjunctiveDefault(self):
g = self.graph.get_context(graphuri)
g.add((tarek, likes, pizza))
g2 = self.graph.get_context(othergraphuri)
g2.add((bob, likes, pizza))
g.add((tarek, hates, cheese))
self.assertEqual(2, len(g), "graph contains 2 triples")
# the following are actually bad tests as they depend on your endpoint,
# as pointed out in the sparqlstore.py code:
#
# For ConjunctiveGraphs, reading is done from the "default graph" Exactly
# what this means depends on your endpoint, because SPARQL does not offer a
# simple way to query the union of all graphs as it would be expected for a
# ConjuntiveGraph.
##
# Fuseki/TDB has a flag for specifying that the default graph
# is the union of all graphs (tdb:unionDefaultGraph in the Fuseki config).
self.assertEqual(
3,
len(self.graph),
"default union graph should contain three triples but contains:\n"
"%s" % list(self.graph),
)
r = self.graph.query("SELECT * WHERE { ?s <urn:likes> <urn:pizza> . }")
self.assertEqual(2, len(list(r)), "two people like pizza")
r = self.graph.query(
"SELECT * WHERE { ?s <urn:likes> <urn:pizza> . }", initBindings={"s": tarek}
)
self.assertEqual(1, len(list(r)), "i was asking only about tarek")
r = self.graph.triples((tarek, likes, pizza))
self.assertEqual(1, len(list(r)), "i was asking only about tarek")
r = self.graph.triples((tarek, likes, cheese))
self.assertEqual(0, len(list(r)), "tarek doesn't like cheese")
g2.remove((bob, likes, pizza))
r = self.graph.query("SELECT * WHERE { ?s <urn:likes> <urn:pizza> . }")
self.assertEqual(1, len(list(r)), "only tarek likes pizza")
def testUpdate(self):
self.graph.update(
"INSERT DATA { GRAPH <urn:graph> { <urn:michel> <urn:likes> <urn:pizza> . } }"
)
g = self.graph.get_context(graphuri)
self.assertEqual(1, len(g), "graph contains 1 triples")
def testUpdateWithInitNs(self):
self.graph.update(
"INSERT DATA { GRAPH ns:graph { ns:michel ns:likes ns:pizza . } }",
initNs={"ns": URIRef("urn:")},
)
g = self.graph.get_context(graphuri)
self.assertEqual(
set(g.triples((None, None, None))),
set([(michel, likes, pizza)]),
"only michel likes pizza",
)
def testUpdateWithInitBindings(self):
self.graph.update(
"INSERT { GRAPH <urn:graph> { ?a ?b ?c . } } WherE { }",
initBindings={
"a": URIRef("urn:michel"),
"b": URIRef("urn:likes"),
"c": URIRef("urn:pizza"),
},
)
g = self.graph.get_context(graphuri)
self.assertEqual(
set(g.triples((None, None, None))),
set([(michel, likes, pizza)]),
"only michel likes pizza",
)
def testUpdateWithBlankNode(self):
self.graph.update(
"INSERT DATA { GRAPH <urn:graph> { _:blankA <urn:type> <urn:Blank> } }"
)
g = self.graph.get_context(graphuri)
for t in g.triples((None, None, None)):
self.assertTrue(isinstance(t[0], BNode))
self.assertEqual(t[1].n3(), "<urn:type>")
self.assertEqual(t[2].n3(), "<urn:Blank>")
def testUpdateWithBlankNodeSerializeAndParse(self):
self.graph.update(
"INSERT DATA { GRAPH <urn:graph> { _:blankA <urn:type> <urn:Blank> } }"
)
g = self.graph.get_context(graphuri)
string = g.serialize(format="ntriples")
raised = False
try:
Graph().parse(data=string, format="ntriples")
except Exception as e:
raised = True
self.assertFalse(raised, "Exception raised when parsing: " + string)
def testMultipleUpdateWithInitBindings(self):
self.graph.update(
"INSERT { GRAPH <urn:graph> { ?a ?b ?c . } } WHERE { };"
"INSERT { GRAPH <urn:graph> { ?d ?b ?c . } } WHERE { }",
initBindings={
"a": URIRef("urn:michel"),
"b": URIRef("urn:likes"),
"c": URIRef("urn:pizza"),
"d": URIRef("urn:bob"),
},
)
g = self.graph.get_context(graphuri)
self.assertEqual(
set(g.triples((None, None, None))),
set([(michel, likes, pizza), (bob, likes, pizza)]),
"michel and bob like pizza",
)
def testNamedGraphUpdate(self):
g = self.graph.get_context(graphuri)
r1 = "INSERT DATA { <urn:michel> <urn:likes> <urn:pizza> }"
g.update(r1)
self.assertEqual(
set(g.triples((None, None, None))),
set([(michel, likes, pizza)]),
"only michel likes pizza",
)
r2 = (
"DELETE { <urn:michel> <urn:likes> <urn:pizza> } "
+ "INSERT { <urn:bob> <urn:likes> <urn:pizza> } WHERE {}"
)
g.update(r2)
self.assertEqual(
set(g.triples((None, None, None))),
set([(bob, likes, pizza)]),
"only bob likes pizza",
)
says = URIRef("urn:says")
# Strings with unbalanced curly braces
tricky_strs = [
"With an unbalanced curly brace %s " % brace for brace in ["{", "}"]
]
for tricky_str in tricky_strs:
r3 = (
"""INSERT { ?b <urn:says> "%s" }
WHERE { ?b <urn:likes> <urn:pizza>} """
% tricky_str
)
g.update(r3)
values = set()
for v in g.objects(bob, says):
values.add(str(v))
self.assertEqual(values, set(tricky_strs))
# Complicated Strings
r4strings = []
r4strings.append(r'''"1: adfk { ' \\\" \" { "''')
r4strings.append(r'''"2: adfk } <foo> #éï \\"''')
r4strings.append(r"""'3: adfk { " \\\' \' { '""")
r4strings.append(r"""'4: adfk } <foo> #éï \\'""")
r4strings.append(r'''"""5: adfk { ' \\\" \" { """''')
r4strings.append(r'''"""6: adfk } <foo> #éï \\"""''')
r4strings.append('"""7: ad adsfj \n { \n sadfj"""')
r4strings.append(r"""'''8: adfk { " \\\' \' { '''""")
r4strings.append(r"""'''9: adfk } <foo> #éï \\'''""")
r4strings.append("'''10: ad adsfj \n { \n sadfj'''")
r4 = "\n".join(
["INSERT DATA { <urn:michel> <urn:says> %s } ;" % s for s in r4strings]
)
g.update(r4)
values = set()
for v in g.objects(michel, says):
values.add(str(v))
self.assertEqual(
values,
set(
[
re.sub(
r"\\(.)",
r"\1",
re.sub(r"^'''|'''$|^'|'$|" + r'^"""|"""$|^"|"$', r"", s),
)
for s in r4strings
]
),
)
# IRI Containing ' or #
# The fragment identifier must not be misinterpreted as a comment
# (commenting out the end of the block).
# The ' must not be interpreted as the start of a string, causing the }
# in the literal to be identified as the end of the block.
r5 = """INSERT DATA { <urn:michel> <urn:hates> <urn:foo'bar?baz;a=1&b=2#fragment>, "'}" }"""
g.update(r5)
values = set()
for v in g.objects(michel, hates):
values.add(str(v))
self.assertEqual(values, set(["urn:foo'bar?baz;a=1&b=2#fragment", "'}"]))
# Comments
r6 = """
INSERT DATA {
<urn:bob> <urn:hates> <urn:bob> . # No closing brace: }
<urn:bob> <urn:hates> <urn:michel>.
}
#Final { } comment"""
g.update(r6)
values = set()
for v in g.objects(bob, hates):
values.add(v)
self.assertEqual(values, set([bob, michel]))
def testNamedGraphUpdateWithInitBindings(self):
g = self.graph.get_context(graphuri)
r = "INSERT { ?a ?b ?c } WHERE {}"
g.update(r, initBindings={"a": michel, "b": likes, "c": pizza})
self.assertEqual(
set(g.triples((None, None, None))),
set([(michel, likes, pizza)]),
"only michel likes pizza",
)
def testEmptyNamedGraph(self):
empty_graph_iri = "urn:empty-graph-1"
self.graph.update("CREATE GRAPH <%s>" % empty_graph_iri)
named_graphs = [
str(r[0]) for r in self.graph.query("SELECT ?name WHERE { GRAPH ?name {} }")
]
# Some SPARQL endpoint backends (like TDB) are not able to find empty named graphs
# (at least with this query)
if empty_graph_iri in named_graphs:
self.assertTrue(
empty_graph_iri in [str(g.identifier) for g in self.graph.contexts()]
)
def testEmptyLiteral(self):
# test for https://github.com/RDFLib/rdflib/issues/457
# also see test_issue457.py which is sparql store independent!
g = self.graph.get_context(graphuri)
g.add(
(
URIRef("http://example.com/s"),
URIRef("http://example.com/p"),
Literal(""),
)
)
o = tuple(g)[0][2]
self.assertEqual(o, Literal(""), repr(o))
if __name__ == "__main__":
unittest.main()
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