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import unittest
import rdflib
import re
TRIPLE = (
rdflib.URIRef("http://example.com/s"),
rdflib.RDFS.label,
rdflib.Literal("example 1"),
)
class TestTrig(unittest.TestCase):
def testEmpty(self):
g = rdflib.Graph()
s = g.serialize(format="trig")
self.assertTrue(s is not None)
def testRepeatTriples(self):
g = rdflib.ConjunctiveGraph()
g.get_context("urn:a").add(
(rdflib.URIRef("urn:1"), rdflib.URIRef("urn:2"), rdflib.URIRef("urn:3"))
)
g.get_context("urn:b").add(
(rdflib.URIRef("urn:1"), rdflib.URIRef("urn:2"), rdflib.URIRef("urn:3"))
)
self.assertEqual(len(g.get_context("urn:a")), 1)
self.assertEqual(len(g.get_context("urn:b")), 1)
s = g.serialize(format="trig", encoding="latin-1")
self.assertTrue(b"{}" not in s) # no empty graphs!
def testSameSubject(self):
g = rdflib.ConjunctiveGraph()
g.get_context("urn:a").add(
(rdflib.URIRef("urn:1"), rdflib.URIRef("urn:p1"), rdflib.URIRef("urn:o1"))
)
g.get_context("urn:b").add(
(rdflib.URIRef("urn:1"), rdflib.URIRef("urn:p2"), rdflib.URIRef("urn:o2"))
)
self.assertEqual(len(g.get_context("urn:a")), 1)
self.assertEqual(len(g.get_context("urn:b")), 1)
s = g.serialize(format="trig", encoding="latin-1")
self.assertEqual(len(re.findall(b"p1", s)), 1)
self.assertEqual(len(re.findall(b"p2", s)), 1)
self.assertTrue(b"{}" not in s) # no empty graphs!
def testRememberNamespace(self):
g = rdflib.ConjunctiveGraph()
g.add(TRIPLE + (rdflib.URIRef("http://example.com/graph1"),))
# In 4.2.0 the first serialization would fail to include the
# prefix for the graph but later serialize() calls would work.
first_out = g.serialize(format="trig", encoding="latin-1")
second_out = g.serialize(format="trig", encoding="latin-1")
self.assertTrue(b"@prefix ns1: <http://example.com/> ." in second_out)
self.assertTrue(b"@prefix ns1: <http://example.com/> ." in first_out)
def testGraphQnameSyntax(self):
g = rdflib.ConjunctiveGraph()
g.add(TRIPLE + (rdflib.URIRef("http://example.com/graph1"),))
out = g.serialize(format="trig", encoding="latin-1")
self.assertTrue(b"ns1:graph1 {" in out)
def testGraphUriSyntax(self):
g = rdflib.ConjunctiveGraph()
# getQName will not abbreviate this, so it should serialize as
# a '<...>' term.
g.add(TRIPLE + (rdflib.URIRef("http://example.com/foo."),))
out = g.serialize(format="trig", encoding="latin-1")
self.assertTrue(b"<http://example.com/foo.> {" in out)
def testBlankGraphIdentifier(self):
g = rdflib.ConjunctiveGraph()
g.add(TRIPLE + (rdflib.BNode(),))
out = g.serialize(format="trig", encoding="latin-1")
graph_label_line = out.splitlines()[-4]
self.assertTrue(re.match(br"^_:[a-zA-Z0-9]+ \{", graph_label_line))
def testGraphParsing(self):
# should parse into single default graph context
data = """
<http://example.com/thing#thing_a> <http://example.com/knows> <http://example.com/thing#thing_b> .
"""
g = rdflib.ConjunctiveGraph()
g.parse(data=data, format="trig")
self.assertEqual(len(list(g.contexts())), 1)
# should parse into single default graph context
data = """
<http://example.com/thing#thing_a> <http://example.com/knows> <http://example.com/thing#thing_b> .
{ <http://example.com/thing#thing_c> <http://example.com/knows> <http://example.com/thing#thing_d> . }
"""
g = rdflib.ConjunctiveGraph()
g.parse(data=data, format="trig")
self.assertEqual(len(list(g.contexts())), 1)
# should parse into 2 contexts, one default, one named
data = """
<http://example.com/thing#thing_a> <http://example.com/knows> <http://example.com/thing#thing_b> .
{ <http://example.com/thing#thing_c> <http://example.com/knows> <http://example.com/thing#thing_d> . }
<http://example.com/graph#graph_a> {
<http://example.com/thing/thing_e> <http://example.com/knows> <http://example.com/thing#thing_f> .
}
"""
g = rdflib.ConjunctiveGraph()
g.parse(data=data, format="trig")
self.assertEqual(len(list(g.contexts())), 2)
@unittest.skipIf(
True, "Iterative serialization currently produces 16 copies of everything"
)
def testRoundTrips(self):
data = """
<http://example.com/thing#thing_a> <http://example.com/knows> <http://example.com/thing#thing_b> .
{ <http://example.com/thing#thing_c> <http://example.com/knows> <http://example.com/thing#thing_d> . }
<http://example.com/graph#graph_a> {
<http://example.com/thing/thing_e> <http://example.com/knows> <http://example.com/thing#thing_f> .
}
"""
g = rdflib.ConjunctiveGraph()
for i in range(5):
g.parse(data=data, format="trig")
data = g.serialize(format="trig").decode()
# output should only contain 1 mention of each resource/graph name
self.assertEqual(data.count("thing_a"), 1)
self.assertEqual(data.count("thing_b"), 1)
self.assertEqual(data.count("thing_c"), 1)
self.assertEqual(data.count("thing_d"), 1)
self.assertEqual(data.count("thing_e"), 1)
self.assertEqual(data.count("thing_f"), 1)
self.assertEqual(data.count("graph_a"), 1)
def testDefaultGraphSerializesWithoutName(self):
data = """
<http://example.com/thing#thing_a> <http://example.com/knows> <http://example.com/thing#thing_b> .
{ <http://example.com/thing#thing_c> <http://example.com/knows> <http://example.com/thing#thing_d> . }
"""
g = rdflib.ConjunctiveGraph()
g.parse(data=data, format="trig")
data = g.serialize(format="trig", encoding="latin-1")
self.assertTrue(b"None" not in data)
def testPrefixes(self):
data = """
@prefix ns1: <http://ex.org/schema#> .
<http://ex.org/docs/document1> = {
ns1:Person_A a ns1:Person ;
ns1:TextSpan "Simon" .
}
<http://ex.org/docs/document2> = {
ns1:Person_C a ns1:Person ;
ns1:TextSpan "Agnes" .
}
"""
cg = rdflib.ConjunctiveGraph()
cg.parse(data=data, format="trig")
data = cg.serialize(format="trig", encoding="latin-1")
self.assertTrue("ns2: <http://ex.org/docs/".encode("latin-1") in data, data)
self.assertTrue("<ns2:document1>".encode("latin-1") not in data, data)
self.assertTrue("ns2:document1".encode("latin-1") in data, data)
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