RDFLib: import N3 data with @base IRI which does not include a slash

test_n3_base_iri_without_a_slash.py

import rdflib

DOCUMENT = """
@base <local:> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .

<class_to_class>
  a
    rdfs:Class ,
    <Category> ;

  <color> "blue" ;
  <priority> 4 .
"""


def test_no_slash_after_colon():
    """Test @base directive with no slash after colon."""
    graph = rdflib.ConjunctiveGraph()
    graph.parse(
        data=DOCUMENT,
        format='n3',
    )

    # Raises ValueError:
    #   Base <local:> has no slash after colon - with relative 'class_to_class'.
    # But perfectly works if to use <local:/> or <local://> as @base.