Distance filter ast node

1 files changed, 17 insertions, 0 deletions

diff --git a/test/triple_store/sparql/test_sparql.py b/test/triple_store/sparql/test_sparql.py
index 1f56a7e..435ca28 100644
--- a/test/triple_store/sparql/test_sparql.py
+++ b/test/triple_store/sparql/test_sparql.py
@@ -392,6 +392,23 @@ class TestSparqlStore(unittest.TestCase):
         class Foo(): pass
         self.assertRaises(TypeError, setattr, store, 'schema', Foo())
 
+        # cannot define features w/o known distance function
+        invalid = bsc.from_string('''
+            prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>
+            prefix xsd: <http://www.w3.org/2001/XMLSchema#>
+            prefix bsfs: <http://bsfs.ai/schema/>
+            prefix bse: <http://bsfs.ai/schema/Entity#>
+
+            bsfs:Array rdfs:subClassOf bsfs:Literal .
+            bsfs:Feature rdfs:subClassOf bsfs:Array .
+
+            bsfs:Colors rdfs:subClassOf bsfs:Feature ;
+                bsfs:dimension "4"^^xsd:integer ;
+                bsfs:distance bsfs:foobar .
+
+            ''')
+        self.assertRaises(ValueError, setattr, store, 'schema', invalid)
+
         # cannot migrate to incompatible schema
         invalid = bsc.from_string('''
             prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>