add manager warnings on client not ready

Author: mredolatti

splitio/client/manager.py

@@ -31,6 +31,12 @@ def split_names(self):
             self._logger.error("Client has already been destroyed - no calls possible.")
             return []
 
+        if not self._factory.ready:
+            self._logger.warning(
+                "split_names: The SDK is not ready, results may be incorrect. "
+                "Make sure to wait for SDK readiness before using this method"
+            )
+
         return self._storage.get_split_names()
 
     def splits(self):
@@ -44,6 +50,12 @@ def splits(self):
             self._logger.error("Client has already been destroyed - no calls possible.")
             return []
 
+        if not self._factory.ready:
+            self._logger.warning(
+                "splits: The SDK is not ready, results may be incorrect. "
+                "Make sure to wait for SDK readiness before using this method"
+            )
+
         return [split.to_split_view() for split in self._storage.get_all_splits()]
 
     def split(self, feature_name):
@@ -66,6 +78,12 @@ def split(self, feature_name):
             self._storage
         )
 
+        if not self._factory.ready:
+            self._logger.warning(
+                "split: The SDK is not ready, results may be incorrect. "
+                "Make sure to wait for SDK readiness before using this method"
+            )
+
         if feature_name is None:
             return None