Disallow FluentBundle.has_message from seeing message attributes

Author: spookylukey

fluent.runtime/fluent/bundle/__init__.py

@@ -45,11 +45,9 @@ def add_messages(self, source):
                     self._messages_and_terms[item.id.name] = item
 
     def has_message(self, message_id):
-        try:
-            self._get_message(message_id)
-            return True
-        except LookupError:
+        if message_id.startswith('-'):
             return False
+        return message_id in self._messages_and_terms
 
     def format(self, message_id, args=None):
         message = self._get_message(message_id)

fluent.runtime/tests/test_bundle.py

@@ -44,7 +44,7 @@ def test_has_message_with_attribute(self):
         """))
 
         self.assertTrue(self.ctx.has_message('foo'))
-        self.assertTrue(self.ctx.has_message('foo.attr'))
+        self.assertFalse(self.ctx.has_message('foo.attr'))
         self.assertFalse(self.ctx.has_message('foo.other-attribute'))
 
     def test_plural_form_english_ints(self):