1 files changed, 46 insertions, 0 deletions

diff --git a/src/mailman/utilities/tests/test_modules.py b/src/mailman/utilities/tests/test_modules.py
new file mode 100644
index 000000000..7d99cbd25
--- /dev/null
+++ b/src/mailman/utilities/tests/test_modules.py
@@ -0,0 +1,46 @@
+# Copyright (C) 2016 by the Free Software Foundation, Inc.
+#
+# This file is part of GNU Mailman.
+#
+# GNU Mailman is free software: you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option)
+# any later version.
+#
+# GNU Mailman 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 General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# GNU Mailman.  If not, see <http://www.gnu.org/licenses/>.
+
+"""Tests for mailman.utilities.modules."""
+
+import os
+import unittest
+
+from mailman.interfaces.styles import IStyle
+from mailman.utilities.modules import find_components
+from pkg_resources import resource_filename
+
+
+class TestModuleImports(unittest.TestCase):
+
+    def test_find_modules_with_dotfiles(self):
+        # Emacs creates lock files when a single file is opened by more than
+        # one user. These files look like .#<filename>.py because of which
+        # find_components tries to import them but fails. All such files should
+        # be ignored by default.
+        bad_file = resource_filename('mailman.styles', '.#bad_file.py')
+        # create the bad file by opening it.
+        fd = os.open(bad_file, os.O_CREAT)
+        # Check if the file was created.
+        self.assertNotEqual(fd, 0)
+        os.close(fd)
+        # try importing all modules from this path i.e. iterate over the
+        # iterator returned by find_components.
+        list(find_components('mailman.styles', IStyle))
+        # remove the bad file.
+        errno = os.remove(bad_file)
+        self.assertNotEqual(errno, 0)