fix/get_message_lang (#71)

ovos_bus_client/util/__init__.py

@@ -38,9 +38,11 @@ def get_message_lang(message=None):
         return None
     # old style lang param
     lang = message.data.get("lang") or message.context.get("lang")
+    if lang:
+        return lang
 
     # new style session lang
-    if not lang and "session_id" in message.context or "session" in message.context:
+    if "session_id" in message.context or "session" in message.context:
         sess = SessionManager.get(message)
         return sess.lang
 

test/unittests/test_message.py

@@ -4,6 +4,8 @@
 from unittest import TestCase
 import json
 from ovos_bus_client import Message
+from ovos_bus_client.util import get_message_lang
+from ovos_config.locale import setup_locale
 from ovos_bus_client.message import dig_for_message
 from ovos_bus_client.session import Session, SessionManager
 
@@ -155,6 +157,23 @@ def test_class_patching(self):
         self.assertIsInstance(m2, Message)
 
 
+class TestLanguageExtraction(TestCase):
+    def test_no_lang_in_message(self):
+        """No lang in message should result in lang from active locale."""
+        setup_locale("it-it")
+        msg = Message('test msg', data={})
+        self.assertEqual(get_message_lang(msg), 'it-it')
+        setup_locale("en-us")
+        self.assertEqual(get_message_lang(msg), 'en-us')
+
+    def test_lang_exists(self):
+        """Message has a lang code in data, it should be used."""
+        msg = Message('test msg', data={'lang': 'de-de'})
+        self.assertEqual(get_message_lang(msg), 'de-de')
+        msg = Message('test msg', data={'lang': 'sv-se'})
+        self.assertEqual(get_message_lang(msg), 'sv-se')
+
+
 class TestCollectionMessage(unittest.TestCase):
     # TODO
     pass