Added test for connection factory

Author: Denny Weinberg

graphene_sqlalchemy/tests/test_connectionfactory.py

@@ -0,0 +1,29 @@
+from graphene_sqlalchemy.fields import SQLAlchemyConnectionField, registerConnectionFieldFactory
+import graphene
+
+def test_register():
+    class LXConnectionField(SQLAlchemyConnectionField):
+        @classmethod
+        def _applyQueryArgs(cls, model, q, args):
+            return q
+
+        @classmethod
+        def connection_resolver(cls, resolver, connection, model, root, args, context, info):
+
+            def LXResolver(root, args, context, info):
+                iterable = resolver(root, args, context, info)
+                if iterable is None:
+                    iterable = cls.get_query(model, context, info, args)
+
+                # We accept always a query here. All LX-queries can be filtered and sorted
+                iterable = cls._applyQueryArgs(model, iterable, args)
+                return iterable
+
+            return SQLAlchemyConnectionField.connection_resolver(LXResolver, connection, model, root, args, context, info)
+
+    def createLXConnectionField(table):
+        return LXConnectionField(table, filter=table.filter(), order_by=graphene.List(of_type=table.order_by))
+
+    registerConnectionFieldFactory(createLXConnectionField)
+
+