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from .testutils import eq_
from unittest import TestCase
from rdflib import BNode, Graph, Literal, Namespace, RDFS, XSD
from rdflib.plugins.sparql.operators import (
register_custom_function,
unregister_custom_function,
)
EX = Namespace("http://example.org/")
G = Graph()
G.add((BNode(), RDFS.label, Literal("bnode")))
NS = {
"ex": EX,
"rdfs": RDFS,
"xsd": XSD,
}
def query(querystr, initNs=NS, initBindings=None):
return G.query(querystr, initNs=initNs, initBindings=initBindings)
def setup():
pass
def teardown():
pass
def test_cast_string_to_string():
res = query("""SELECT (xsd:string("hello") as ?x) {}""")
eq_(list(res)[0][0], Literal("hello", datatype=XSD.string))
def test_cast_int_to_string():
res = query("""SELECT (xsd:string(42) as ?x) {}""")
eq_(list(res)[0][0], Literal("42", datatype=XSD.string))
def test_cast_float_to_string():
res = query("""SELECT (xsd:string(3.14) as ?x) {}""")
eq_(list(res)[0][0], Literal("3.14", datatype=XSD.string))
def test_cast_bool_to_string():
res = query("""SELECT (xsd:string(true) as ?x) {}""")
eq_(list(res)[0][0], Literal("true", datatype=XSD.string))
def test_cast_iri_to_string():
res = query("""SELECT (xsd:string(<http://example.org/>) as ?x) {}""")
eq_(list(res)[0][0], Literal("http://example.org/", datatype=XSD.string))
def test_cast_datetime_to_datetime():
res = query(
"""SELECT (xsd:dateTime("1970-01-01T00:00:00Z"^^xsd:dateTime) as ?x) {}"""
)
eq_(list(res)[0][0], Literal("1970-01-01T00:00:00Z", datatype=XSD.dateTime))
def test_cast_string_to_datetime():
res = query(
"""SELECT (xsd:dateTime("1970-01-01T00:00:00Z"^^xsd:string) as ?x) {}"""
)
eq_(list(res)[0][0], Literal("1970-01-01T00:00:00Z", datatype=XSD.dateTime))
def test_cast_string_to_float():
res = query("""SELECT (xsd:float("0.5") as ?x) {}""")
eq_(list(res)[0][0], Literal("0.5", datatype=XSD.float))
def test_cast_int_to_float():
res = query("""SELECT (xsd:float(1) as ?x) {}""")
eq_(list(res)[0][0], Literal("1", datatype=XSD.float))
def test_cast_float_to_float():
res = query("""SELECT (xsd:float("0.5"^^xsd:float) as ?x) {}""")
eq_(list(res)[0][0], Literal("0.5", datatype=XSD.float))
def test_cast_double_to_float():
res = query("""SELECT (xsd:float("0.5"^^xsd:double) as ?x) {}""")
eq_(list(res)[0][0], Literal("0.5", datatype=XSD.float))
def test_cast_decimal_to_float():
res = query("""SELECT (xsd:float("0.5"^^xsd:decimal) as ?x) {}""")
eq_(list(res)[0][0], Literal("0.5", datatype=XSD.float))
def test_cast_string_to_double():
res = query("""SELECT (xsd:double("0.5") as ?x) {}""")
eq_(list(res)[0][0], Literal("0.5", datatype=XSD.double))
def test_cast_int_to_double():
res = query("""SELECT (xsd:double(1) as ?x) {}""")
eq_(list(res)[0][0], Literal("1", datatype=XSD.double))
def test_cast_float_to_double():
res = query("""SELECT (xsd:double("0.5"^^xsd:float) as ?x) {}""")
eq_(list(res)[0][0], Literal("0.5", datatype=XSD.double))
def test_cast_double_to_double():
res = query("""SELECT (xsd:double("0.5"^^xsd:double) as ?x) {}""")
eq_(list(res)[0][0], Literal("0.5", datatype=XSD.double))
def test_cast_decimal_to_double():
res = query("""SELECT (xsd:double("0.5"^^xsd:decimal) as ?x) {}""")
eq_(list(res)[0][0], Literal("0.5", datatype=XSD.double))
def test_cast_string_to_decimal():
res = query("""SELECT (xsd:decimal("0.5") as ?x) {}""")
eq_(list(res)[0][0], Literal("0.5", datatype=XSD.decimal))
def test_cast_int_to_decimal():
res = query("""SELECT (xsd:decimal(1) as ?x) {}""")
eq_(list(res)[0][0], Literal("1", datatype=XSD.decimal))
def test_cast_float_to_decimal():
res = query("""SELECT (xsd:decimal("0.5"^^xsd:float) as ?x) {}""")
eq_(list(res)[0][0], Literal("0.5", datatype=XSD.decimal))
def test_cast_double_to_decimal():
res = query("""SELECT (xsd:decimal("0.5"^^xsd:double) as ?x) {}""")
eq_(list(res)[0][0], Literal("0.5", datatype=XSD.decimal))
def test_cast_decimal_to_decimal():
res = query("""SELECT (xsd:decimal("0.5"^^xsd:decimal) as ?x) {}""")
eq_(list(res)[0][0], Literal("0.5", datatype=XSD.decimal))
def test_cast_string_to_int():
res = query("""SELECT (xsd:integer("42") as ?x) {}""")
eq_(list(res)[0][0], Literal("42", datatype=XSD.integer))
def test_cast_int_to_int():
res = query("""SELECT (xsd:integer(42) as ?x) {}""")
eq_(list(res)[0][0], Literal("42", datatype=XSD.integer))
def test_cast_string_to_bool():
res = query("""SELECT (xsd:boolean("TRUE") as ?x) {}""")
eq_(list(res)[0][0], Literal("true", datatype=XSD.boolean))
def test_cast_bool_to_bool():
res = query("""SELECT (xsd:boolean(true) as ?x) {}""")
eq_(list(res)[0][0], Literal("true", datatype=XSD.boolean))
def test_call_exf():
res = query("""SELECT (ex:f(42, "hello") as ?x) {}""")
eq_(len(list(res)), 0)
class TestCustom(TestCase):
@staticmethod
def f(x, y):
return Literal("%s %s" % (x, y), datatype=XSD.string)
def setUp(self):
register_custom_function(EX.f, self.f)
def tearDown(self):
unregister_custom_function(EX.f, self.f)
def test_register_twice_fail(self):
with self.assertRaises(ValueError):
register_custom_function(EX.f, self.f)
def test_register_override(self):
register_custom_function(EX.f, self.f, override=True)
def test_wrong_unregister_fails(self):
with self.assertRaises(ValueError):
unregister_custom_function(EX.f, lambda x, y: None)
def test_f(self):
res = query("""SELECT (ex:f(42, "hello") as ?x) {}""")
eq_(list(res)[0][0], Literal("42 hello", datatype=XSD.string))
def test_f_too_few_args(self):
res = query("""SELECT (ex:f(42) as ?x) {}""")
eq_(len(list(res)), 0)
def test_f_too_many_args(self):
res = query("""SELECT (ex:f(42, "hello", "world") as ?x) {}""")
eq_(len(list(res)), 0)
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