Added context example

Author: syrusakbary

examples/context_example.py

@@ -0,0 +1,39 @@
+import graphene
+
+
+class User(graphene.ObjectType):
+    id = graphene.ID()
+    name = graphene.String()
+
+
+class Query(graphene.ObjectType):
+    me = graphene.Field(User)
+
+    def resolve_me(self, args, context, info):
+        return context['user']
+
+schema = graphene.Schema(query=Query)
+query = '''
+    query something{
+      me {
+        id
+        name
+      }
+    }
+'''
+
+
+def test_query():
+    result = schema.execute(query, context_value={'user': User(id='1', name='Syrus')})
+    assert not result.errors
+    assert result.data == {
+        'me': {
+            'id': '1',
+            'name': 'Syrus',
+        }
+    }
+
+
+if __name__ == '__main__':
+    result = schema.execute(query, context_value={'user': User(id='X', name='Console')})
+    print(result.data['me'])