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import unittest
import rdflib
import re
from rdflib.py3compat import b
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')
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')
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')
second_out = g.serialize(format='trig')
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')
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')
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')
graph_label_line = out.splitlines()[-4]
self.assertTrue(re.match(br'^_:[a-zA-Z0-9]+ \{', graph_label_line))
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