Test base REST Client

tiingo/restclient.py

@@ -20,6 +20,12 @@ class RestClient(object):
         """
         self._config = config
 
+        # The child class should override these properties or else the
+        # restclient won't work. Reevalute whether to do this as an abstract
+        # base class so it doesn't get used by itself.
+        self._headers = {}
+        self._base_url = ""
+
         if config.get('session'):
             self._session = requests.Session()
         else: