Allow @base URI to have a trailing hash '#'

rdflib/plugins/parsers/notation3.py

@@ -109,8 +109,8 @@ def join(here, there):
     %(u)s'http://example.org/#Andr\\xe9'
     """
 
-    assert(here.find("#") < 0), \
-        "Base may not contain hash: '%s'" % here  # why must caller splitFrag?
+#    assert(here.find("#") < 0), \
+#        "Base may not contain hash: '%s'" % here  # why must caller splitFrag?
 
     slashl = there.find('/')
     colonl = there.find(':')

test/test_issue379.py

@@ -0,0 +1,56 @@
+import unittest
+
+import rdflib
+
+prefix_data = """
+              @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
+              @prefix : <http://www.example.com#> .
+
+              <http://www.example.com#prefix> a rdf:class ."""
+
+base_data = """
+            @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
+            @base <http://www.example.com#> .
+
+            <http://www.example.com#base> a rdf:class .
+            """
+
+
+class TestCase(unittest.TestCase):
+    def assertIsInstance(self, obj, cls, msg=None, *args, **kwargs):
+        """Python < v2.7 compatibility.  Assert 'obj' is instance of 'cls'"""
+        try:
+            f = super(TestCase, self).assertIsInstance
+        except AttributeError:
+            self.assertTrue(isinstance(obj, cls), *args, **kwargs)
+        else:
+            f(obj, cls, *args, **kwargs)
+
+
+class TestBaseAllowsHash(TestCase):
+    """
+    GitHub Issue 379: https://github.com/RDFLib/rdflib/issues/379
+    """
+    def setUp(self):
+        self.g = rdflib.Graph()
+
+    def test_parse_successful_prefix_with_hash(self):
+        """
+        Test parse of '@prefix' namespace directive to allow a trailing hash '#', as is
+        permitted for an IRIREF:
+        http://www.w3.org/TR/2014/REC-turtle-20140225/#grammar-production-prefixID
+        """
+        self.g.parse(data=prefix_data, format='n3')
+        self.assertIsInstance(self.g.subjects().next(), rdflib.URIRef)
+
+    def test_parse_successful_base_with_hash(self):
+        """
+        Test parse of '@base' namespace directive to allow a trailing hash '#', as is
+        permitted for an '@prefix' since both allow an IRIREF:
+        http://www.w3.org/TR/2014/REC-turtle-20140225/#grammar-production-base
+        """
+        self.g.parse(data=base_data, format='n3')
+        self.assertIsInstance(self.g.subjects().next(), rdflib.URIRef)
+
+if __name__ == "__main__":
+    unittest.main()