misc: use unicode strings in lazy_join (#43287)

src/authentic2/utils/lazy.py

@@ -14,6 +14,8 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+from __future__ import unicode_literals
+
 from django.utils.encoding import force_text
 from django.utils import six
 from django.utils.text import format_lazy

tests/test_utils_lazy.py

@@ -0,0 +1,39 @@
+# authentic2 - versatile identity manager
+# Copyright (C) 2010-2019 Entr'ouvert
+#
+# This program is free software: you can redistribute it and/or modify it
+# under the terms of the GNU Affero General Public License as published
+# by the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from __future__ import unicode_literals
+
+import pytest
+
+from django.utils import six
+
+from authentic2.utils.lazy import lazy_join
+
+
+def test_lazy_join():
+    assert lazy_join(', ', ['\xe9']) == '\xe9'
+    assert lazy_join(', ', ['\xe9'] * 2) == '\xe9, \xe9'
+    if six.PY2:
+        assert lazy_join(b', ', ['\xe9']) == '\xe9'
+        assert lazy_join(b', ', ['\xe9'] * 2) == '\xe9, \xe9'
+        with pytest.raises(UnicodeDecodeError):
+            assert lazy_join(b', ', [b'\xe9']) == ''
+        with pytest.raises(UnicodeDecodeError):
+            assert lazy_join(b', ', [b'\xe9'] * 2) == ''
+        with pytest.raises(UnicodeDecodeError):
+            assert lazy_join(', ', [b'\xe9']) == ''
+        with pytest.raises(UnicodeDecodeError):
+            assert lazy_join(', ', [b'\xe9'] * 2) == ''