1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
from decimal import Decimal
import unittest
from rdflib import Graph, Namespace, URIRef, Literal, XSD
from rdflib.compare import to_isomorphic
class TestIssue655(unittest.TestCase):
def test_issue655(self):
# make sure that inf and nan are serialized correctly
dt = XSD["double"].n3()
self.assertEqual(Literal(float("inf"))._literal_n3(True), '"INF"^^%s' % dt)
self.assertEqual(Literal(float("-inf"))._literal_n3(True), '"-INF"^^%s' % dt)
self.assertEqual(Literal(float("nan"))._literal_n3(True), '"NaN"^^%s' % dt)
dt = XSD["decimal"].n3()
self.assertEqual(Literal(Decimal("inf"))._literal_n3(True), '"INF"^^%s' % dt)
self.assertEqual(Literal(Decimal("-inf"))._literal_n3(True), '"-INF"^^%s' % dt)
self.assertEqual(Literal(Decimal("nan"))._literal_n3(True), '"NaN"^^%s' % dt)
self.assertEqual(
Literal("inf", datatype=XSD["decimal"])._literal_n3(True), '"INF"^^%s' % dt
)
# assert that non-numerical aren't changed
self.assertEqual(Literal("inf")._literal_n3(True), '"inf"')
self.assertEqual(Literal("nan")._literal_n3(True), '"nan"')
PROV = Namespace("http://www.w3.org/ns/prov#")
bob = URIRef("http://example.org/object/Bob")
# g1 is a simple graph with an infinite and a nan values
g1 = Graph()
g1.add((bob, PROV.value, Literal(float("inf"))))
g1.add((bob, PROV.value, Literal(float("nan"))))
# Build g2 out of the deserialisation of g1 serialisation
g2 = Graph()
g2.parse(data=g1.serialize(format="turtle"), format="turtle")
self.assertTrue(to_isomorphic(g1) == to_isomorphic(g2))
if __name__ == "__main__":
unittest.main()
|
