Added python to test setup.

graphene/relay/tests/test_query.py

@@ -4,6 +4,8 @@ from graphql.type import GraphQLID, GraphQLNonNull
 import graphene
 from graphene import relay, with_context
 
+from promise import Promise
+
 schema = graphene.Schema()
 
 

setup.py

@@ -66,6 +66,7 @@ setup(
         'sqlalchemy',
         'sqlalchemy_utils',
         'mock',
+        'promse',
         # Required for Django postgres fields testing
         'psycopg2',
     ],

tox.ini

@@ -14,6 +14,7 @@ deps=
     blinker
     singledispatch
     mock
+    promise
 setenv =
      PYTHONPATH = .:{envdir}
 commands=