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from rdflib.term import URIRef, BNode
from rdflib.namespace import RDFS
from io import BytesIO
from rdflib.plugins.serializers.rdfxml import XMLSerializer
from rdflib.graph import ConjunctiveGraph
class SerializerTestBase(object):
repeats = 8
def setup(self):
graph = ConjunctiveGraph()
graph.parse(data=self.testContent, format=self.testContentFormat)
self.sourceGraph = graph
def test_serialize_and_reparse(self):
reparsedGraph = serialize_and_load(self.sourceGraph, self.serializer)
_assert_equal_graphs(self.sourceGraph, reparsedGraph)
def test_multiple(self):
"""Repeats ``test_serialize`` ``self.repeats`` times, to reduce sucess based on in-memory ordering."""
for i in range(self.repeats):
self.test_serialize_and_reparse()
# test_multiple.slowtest=True # not really slow?
def _assert_equal_graphs(g1, g2):
assert len(g1) == len(g2), "Serialized graph not same size as source graph."
g1copy = _mangled_copy(g1)
g2copy = _mangled_copy(g2)
g1copy -= _mangled_copy(g2)
g2copy -= _mangled_copy(g1)
assert len(g1copy) == 0, "Source graph larger than serialized graph."
assert len(g2copy) == 0, "Serialized graph larger than source graph."
_blank = BNode()
def _mangled_copy(g):
"Makes a copy of the graph, replacing all bnodes with the bnode ``_blank``."
gcopy = ConjunctiveGraph()
def isbnode(v):
return isinstance(v, BNode)
for s, p, o in g:
if isbnode(s):
s = _blank
if isbnode(p):
p = _blank
if isbnode(o):
o = _blank
gcopy.add((s, p, o))
return gcopy
def serialize(sourceGraph, makeSerializer, getValue=True, extra_args={}):
serializer = makeSerializer(sourceGraph)
stream = BytesIO()
serializer.serialize(stream, **extra_args)
return getValue and stream.getvalue() or stream
def serialize_and_load(sourceGraph, makeSerializer):
stream = serialize(sourceGraph, makeSerializer, False)
stream.seek(0)
reparsedGraph = ConjunctiveGraph()
reparsedGraph.load(stream)
return reparsedGraph
class TestXMLSerializer(SerializerTestBase):
serializer = XMLSerializer
testContent = """
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix : <http://example.org/model/test#> .
:value rdfs:domain :Test .
:Test rdfs:subClassOf
[ a owl:Restriction;
owl:onProperty :value ],
[ a owl:Restriction;
owl:onProperty :name ] .
<http://example.org/data/a> a :Test;
rdfs:seeAlso <http://example.org/data/b>;
:value "A" .
<http://example.org/data/b>
:name "Bee"@en, "Be"@sv;
:value "B" .
<http://example.org/data/c> a rdfs:Resource;
rdfs:seeAlso <http://example.org/data/c>;
:value 3 .
<http://example.org/data/d> a rdfs:Resource;
rdfs:seeAlso <http://example.org/data/c> ;
rdfs:seeAlso <http://example.org/data/b> ;
rdfs:seeAlso <http://example.org/data/a> .
_:bnode1 a :BNode;
rdfs:seeAlso _:bnode2 .
_:bnode2 a :BNode ;
rdfs:seeAlso _:bnode3 .
_:bnode3 a :BNode ;
rdfs:seeAlso _:bnode2 .
"""
testContentFormat = "n3"
def test_result_fragments(self):
rdfXml = serialize(self.sourceGraph, self.serializer)
# print "--------"
# print rdfXml
# print "--------"
assert (
'<rdf:Description rdf:about="http://example.org/data/a">'.encode("latin-1")
in rdfXml
)
assert (
'<rdf:type rdf:resource="http://example.org/model/test#Test"/>'.encode(
"latin-1"
)
in rdfXml
)
assert (
'<rdf:Description rdf:about="http://example.org/data/b">'.encode("latin-1")
in rdfXml
)
assert '<name xml:lang="en">Bee</name>'.encode("latin-1") in rdfXml
assert (
'<value rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">3</value>'.encode(
"latin-1"
)
in rdfXml
)
assert (
'<rdf:Description rdf:nodeID="'.encode("latin-1") in rdfXml
), "expected one identified bnode in serialized graph"
def test_result_fragments_with_base(self):
rdfXml = serialize(
self.sourceGraph,
self.serializer,
extra_args={
"base": "http://example.org/",
"xml_base": "http://example.org/",
},
)
# print "--------"
# print rdfXml
# print "--------"
assert 'xml:base="http://example.org/"'.encode("latin-1") in rdfXml
assert '<rdf:Description rdf:about="data/a">'.encode("latin-1") in rdfXml
assert '<rdf:type rdf:resource="model/test#Test"/>'.encode("latin-1") in rdfXml
assert '<rdf:Description rdf:about="data/b">'.encode("latin-1") in rdfXml
assert (
'<value rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">3</value>'.encode(
"latin-1"
)
in rdfXml
)
assert (
'<rdf:Description rdf:nodeID="'.encode("latin-1") in rdfXml
), "expected one identified bnode in serialized graph"
def test_subClassOf_objects(self):
reparsedGraph = serialize_and_load(self.sourceGraph, self.serializer)
_assert_expected_object_types_for_predicates(
reparsedGraph, [RDFS.seeAlso, RDFS.subClassOf], [URIRef, BNode]
)
def _assert_expected_object_types_for_predicates(graph, predicates, types):
for s, p, o in graph:
if p in predicates:
someTrue = [isinstance(o, t) for t in types]
assert (
True in someTrue
), "Bad type %s for object when predicate is <%s>." % (type(o), p)
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