diff -r 000000000000 -r 6474c204b198 testing/mozbase/mozversion/tests/test_b2g.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/testing/mozbase/mozversion/tests/test_b2g.py	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,59 @@
+#!/usr/bin/env python
+
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this file,
+# You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import os
+import tempfile
+import unittest
+import zipfile
+
+import mozfile
+from mozversion import get_version
+
+
+class SourcesTest(unittest.TestCase):
+    """test getting version information from a sources xml"""
+
+    def setUp(self):
+        self.tempdir = tempfile.mkdtemp()
+
+        self.binary = os.path.join(self.tempdir, 'binary')
+        with open(self.binary, 'w') as f:
+            f.write('foobar')
+
+        with open(os.path.join(self.tempdir, 'application.ini'), 'w') as f:
+            f.writelines("""[App]\nName = B2G\n""")
+
+    def tearDown(self):
+        mozfile.remove(self.tempdir)
+
+    def _create_zip(self, revision, date='date'):
+        zip_path = os.path.join(
+            self.tempdir, 'gaia', 'profile', 'webapps',
+            'settings.gaiamobile.org', 'application.zip')
+        os.makedirs(os.path.dirname(zip_path))
+        app_zip = zipfile.ZipFile(zip_path, 'w')
+        app_zip.writestr('resources/gaia_commit.txt', revision + '\n' + date)
+        app_zip.close()
+
+    def test_gaia_commit(self):
+        self._create_zip('a' * 40, 'date')
+        v = get_version(self.binary)
+        self.assertEqual(v.get('gaia_changeset'), 'a' * 40)
+        self.assertEqual(v.get('gaia_date'), 'date')
+
+    def test_invalid_gaia_commit(self):
+        self._create_zip('a' * 41)
+        v = get_version(self.binary)
+        self.assertIsNone(v.get('gaia_changeset'))
+
+    def test_missing_gaia_commit(self):
+        v = get_version(self.binary)
+        self.assertIsNone(v.get('gaia_changeset'))
+        self.assertIsNone(v.get('gaia_date'))
+
+
+if __name__ == '__main__':
+    unittest.main()