diff -r 000000000000 -r 6474c204b198 testing/mozbase/mozfile/tests/test_url.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/testing/mozbase/mozfile/tests/test_url.py	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,21 @@
+#!/usr/bin/env python
+
+"""
+tests for is_url
+"""
+
+import unittest
+from mozfile import is_url
+
+
+class TestIsUrl(unittest.TestCase):
+    """test the is_url function"""
+
+    def test_is_url(self):
+        self.assertTrue(is_url('http://mozilla.org'))
+        self.assertFalse(is_url('/usr/bin/mozilla.org'))
+        self.assertTrue(is_url('file:///usr/bin/mozilla.org'))
+        self.assertFalse(is_url('c:\foo\bar'))
+
+if __name__ == '__main__':
+    unittest.main()