def test_get_node(self):
        skos_concept_iri = rdflib.URIRef(
            "http://www.w3.org/2004/02/skos/core#Concept")
        skos_concept_label = "skos:Concept"
        skos_concept_id = self.g.V().hasLabel(
            skos_concept_label).toList()[0].id
        skos_concept_node = self.g.V().hasLabel(skos_concept_label).toList()[0]
        # known_iri_str = "http://publications.europa.eu/resources/authority/celex/md_OJ_ID"

        n = rdf2g.get_node(self.g, skos_concept_iri)
        assert isinstance(n, Vertex), "The node is not found; 1"
        assert rdf2g.get_node_properties(
            self.g, n)["@label"] == skos_concept_label, "Wrong label"
        n = rdf2g.get_node(self.g, skos_concept_label)
        assert isinstance(n, Vertex), "The node is not found; 2"
        assert rdf2g.get_node_properties(
            self.g, n)["@label"] == skos_concept_label, "Wrong label"
        n = rdf2g.get_node(self.g, skos_concept_id)
        assert isinstance(n, Vertex), "The node is not found; 3"
        assert rdf2g.get_node_properties(
            self.g, n)["@label"] == skos_concept_label, "Wrong label"
        n = rdf2g.get_node(self.g, skos_concept_node)
        assert isinstance(n, Vertex), "The node is not found; 4"
        assert rdf2g.get_node_properties(
            self.g, n)["@label"] == skos_concept_label, "Wrong label"
    def test_get_node_1(self):
        skos_concept_iri = rdflib.URIRef(
            "http://publications.europa.eu/resources/authority/lam/res_h9ci2wPXrcUXBh9JkkHzUY"
        )
        skos_concept_label = "lamd:res_h9ci2wPXrcUXBh9JkkHzUY"
        pprint(self.g.V().hasLabel(skos_concept_label).toList())

        skos_concept_id = self.g.V().hasLabel(
            skos_concept_label).toList()[0].id
        skos_concept_node = self.g.V().hasLabel(skos_concept_label).toList()[0]

        n = rdf2g.get_node(self.g, skos_concept_iri)
        assert isinstance(n, Vertex), "The node is not found; 1"
        assert rdf2g.get_node_properties(
            self.g, n)["@label"] == skos_concept_label, "Wrong label"
        n = rdf2g.get_node(self.g, skos_concept_label)
        assert isinstance(n, Vertex), "The node is not found; 2"
        assert rdf2g.get_node_properties(
            self.g, n)["@label"] == skos_concept_label, "Wrong label"
        n = rdf2g.get_node(self.g, skos_concept_id)
        assert isinstance(n, Vertex), "The node is not found; 3"
        assert rdf2g.get_node_properties(
            self.g, n)["@label"] == skos_concept_label, "Wrong label"
        n = rdf2g.get_node(self.g, skos_concept_node)
        assert isinstance(n, Vertex), "The node is not found; 4"
        assert rdf2g.get_node_properties(
            self.g, n)["@label"] == skos_concept_label, "Wrong label"
    def test_add_property(self):
        known_iri_str = "http://publications.europa.eu/resources/authority/celex/md_OJ_ID"
        n = rdf2g.get_node(self.g, known_iri_str)

        rdf2g.add_property(self.g, n, "property", "value", self.rdf_graph)
        props = rdf2g.get_node_properties(self.g, n)
        assert 'property' in props, "Expecting 'property' key among the node properties "

        rdf2g.add_property(self.g, n, rdflib.URIRef(known_iri_str),
                           "super value", self.rdf_graph)
        props = rdf2g.get_node_properties(self.g, n)
        assert 'celexd:md_OJ_ID' in props, "Expecting 'celexd:md_OJ_ID' key among the node properties "
 def test_get_node_properties(self):
     known_iri_str = "http://publications.europa.eu/resources/authority/celex/md_OJ_ID"
     n = rdf2g.get_node(self.g, known_iri_str)
     props = rdf2g.get_node_properties(self.g, n)
     assert 'iri' in props, "Expecting 'iri' key among the node properties "