add --unknown-members argument to mat2

This allows the user to make use of parser.unknown_member_policy for
archive formats.

At the suggestion of @jvoisin, it also prints a scary warning if the
user explicitly chooses 'keep'.

1 files changed, 4 insertions, 2 deletions

diff --git a/tests/test_climat2.py b/tests/test_climat2.py
index af89c0e..6ee84d5 100644
--- a/tests/test_climat2.py
+++ b/tests/test_climat2.py
@@ -8,12 +8,14 @@ class TestHelp(unittest.TestCase):
     def test_help(self):
         proc = subprocess.Popen(['./mat2', '--help'], stdout=subprocess.PIPE)
         stdout, _ = proc.communicate()
-        self.assertIn(b'usage: mat2 [-h] [-v] [-l] [-c] [-V] [-s | -L] [files [files ...]]', stdout)
+        self.assertIn(b'usage: mat2 [-h] [-v] [-l] [-c] [-V] [-u POLICY] [-s | -L] [files [files ...]]',
+                      stdout)
 
     def test_no_arg(self):
         proc = subprocess.Popen(['./mat2'], stdout=subprocess.PIPE)
         stdout, _ = proc.communicate()
-        self.assertIn(b'usage: mat2 [-h] [-v] [-l] [-c] [-V] [-s | -L] [files [files ...]]', stdout)
+        self.assertIn(b'usage: mat2 [-h] [-v] [-l] [-c] [-V] [-u POLICY] [-s | -L] [files [files ...]]',
+                      stdout)
 
 
 class TestVersion(unittest.TestCase):