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from unittest import TestCase
from rdflib.graph import ConjunctiveGraph


class EntityTest(TestCase):
    def test_turtle_namespace_prefixes(self):

        g = ConjunctiveGraph()
        n3 = """
        @prefix _9: <http://data.linkedmdb.org/resource/movie/> .
        @prefix p_9: <urn:test:> .
        @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .

        p_9:a p_9:b p_9:c .

        <http://data.linkedmdb.org/resource/director/1> a
        <http://data.linkedmdb.org/resource/movie/director>;
            rdfs:label "Cecil B. DeMille (Director)";
            _9:director_name "Cecil B. DeMille" ."""

        g.parse(data=n3, format="n3")
        turtle = g.serialize(format="turtle")

        # Check round-tripping, just for kicks.
        g = ConjunctiveGraph()
        g.parse(data=turtle, format="turtle")
        # Shouldn't have got to here
        s = g.serialize(format="turtle", encoding="latin-1")

        self.assertTrue(b"@prefix _9" not in s)