Added test for the diff command.

tests/test_diff.py

@@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+# Copyright (C) 2010 Bastian Kleineidam
+#
+# This program 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.
+#
+# 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+import unittest
+import os
+import patoolib
+from tests import datadir, needs_program
+
+class ArchiveDiffTest (unittest.TestCase):
+
+    @needs_program('diff')
+    @needs_program('tar')
+    @needs_program('unzip')
+    def test_diff (self):
+        archive1 = os.path.join(datadir, "t.tar")
+        archive2 = os.path.join(datadir, "t.zip")
+        res = patoolib.handle_archive(archive1, "diff", archive2)
+        # both archives have the same data
+        self.assertEqual(res, 0)