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import unittest
from rdflib.graph import Graph
from rdflib.term import URIRef
from six import b
class NamespacePrefixTest(unittest.TestCase):
def test_compute_qname(self):
"""Test sequential assignment of unknown prefixes"""
g = Graph()
self.assertEqual(g.compute_qname(URIRef("http://foo/bar/baz")),
("ns1", URIRef("http://foo/bar/"), "baz"))
self.assertEqual(g.compute_qname(URIRef("http://foo/bar#baz")),
("ns2", URIRef("http://foo/bar#"), "baz"))
# should skip to ns4 when ns3 is already assigned
g.bind("ns3", URIRef("http://example.org/"))
self.assertEqual(g.compute_qname(URIRef("http://blip/blop")),
("ns4", URIRef("http://blip/"), "blop"))
def test_n3(self):
g = Graph()
g.add((URIRef("http://example.com/foo"),
URIRef("http://example.com/bar"),
URIRef("http://example.com/baz")))
n3 = g.serialize(format="n3")
# Gunnar disagrees that this is right:
# self.assertTrue("<http://example.com/foo> ns1:bar <http://example.com/baz> ." in n3)
# as this is much prettier, and ns1 is already defined:
self.assertTrue(b("ns1:foo ns1:bar ns1:baz .") in n3)
def test_n32(self):
# this test not generating prefixes for subjects/objects
g = Graph()
g.add((URIRef("http://example1.com/foo"),
URIRef("http://example2.com/bar"),
URIRef("http://example3.com/baz")))
n3 = g.serialize(format="n3")
self.assertTrue(b("<http://example1.com/foo> ns1:bar <http://example3.com/baz> .") in n3)
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