diff -r 000000000000 -r 6474c204b198 testing/mozbase/mozdevice/tests/sut_chmod.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/testing/mozbase/mozdevice/tests/sut_chmod.py	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,21 @@
+#/usr/bin/env python
+import mozdevice
+import mozlog
+import unittest
+from sut import MockAgent
+
+
+class TestChmod(unittest.TestCase):
+
+    def test_chmod(self):
+
+        command = [('chmod /mnt/sdcard/test', 'Changing permissions for /storage/emulated/legacy/Test\n'
+                                              '        <empty>\n'
+                                              'chmod /storage/emulated/legacy/Test ok\n')]
+        m = MockAgent(self, commands=command)
+        d = mozdevice.DroidSUT('127.0.0.1', port=m.port, logLevel=mozlog.DEBUG)
+
+        self.assertEqual(None, d.chmodDir('/mnt/sdcard/test'))
+
+if __name__ == '__main__':
+    unittest.main()