2 files changed, 42 insertions, 0 deletions
diff --git a/run_tests.py b/run_tests.py
index 33b6cf10..39a060aa 100644
--- a/run_tests.py
+++ b/run_tests.py
@@ -50,6 +50,8 @@ from test.rules import *
 
 from test.n3Test import *
 
+from test.JSON import JSON
+
 import test.rdfa
 
 from test.events import *
diff --git a/test/JSON.py b/test/JSON.py
new file mode 100644
index 00000000..1514fadd
--- /dev/null
+++ b/test/JSON.py
@@ -0,0 +1,40 @@
+from rdflib import ConjunctiveGraph, plugin
+from rdflib.store import Store
+from StringIO import StringIO
+import unittest
+
+test_data = """ 
+@prefix foaf:       <http://xmlns.com/foaf/0.1/> .
+@prefix rdf:        <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
+
+<http://example.org/alice>  foaf:name       "Alice" .
+<http://example.org/alice>  foaf:knows      <http://example.org/bob> .
+<http://example.org/bob>  foaf:name       "Bob" .
+"""
+
+test_query = """
+PREFIX foaf: <http://xmlns.com/foaf/0.1/>
+
+SELECT ?name ?x ?friend
+WHERE { ?x foaf:name ?name .
+        OPTIONAL { ?x foaf:knows ?friend . }
+}
+"""
+
+correct = """"name" : {"type": "literal", "xml:lang" : "None", "value" : "Bob"},\n                   "x" : {"type": "uri", "value" : "http://example.org/bob"}\n                }"""
+
+
+# See Also: http://rdflib.net/pipermail/dev/2006-November/000112.html
+
+
+class JSON(unittest.TestCase):
+
+    def testOPTIONALSimple(self):
+        graph = ConjunctiveGraph(plugin.get('IOMemory',Store)())
+        graph.parse(StringIO(test_data), format="n3")
+        results = graph.query(test_query)
+        result_json = results.serialize(format='json')
+        self.failUnless(result_json.find(correct) > 0)
+
+if __name__ == "__main__":
+    unittest.main()