diff -r 000000000000 -r 6474c204b198 config/tests/unit-printprereleasesuffix.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/config/tests/unit-printprereleasesuffix.py	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,80 @@
+import unittest
+
+import sys
+import os.path
+import mozunit
+
+from printprereleasesuffix import get_prerelease_suffix
+
+class TestGetPreReleaseSuffix(unittest.TestCase):
+  """
+  Unit tests for the get_prerelease_suffix function
+  """
+
+  def test_alpha_1(self):
+    """test 1a1 version string"""
+    self.c = get_prerelease_suffix('1a1')
+    self.assertEqual(self.c, ' 1 Alpha 1')
+
+  def test_alpha_10(self):
+    """test 1.2a10 version string"""
+    self.c = get_prerelease_suffix('1.2a10')
+    self.assertEqual(self.c, ' 1.2 Alpha 10')
+
+  def test_beta_3(self):
+    """test 1.2.3b3 version string"""
+    self.c = get_prerelease_suffix('1.2.3b3')
+    self.assertEqual(self.c, ' 1.2.3 Beta 3')
+
+  def test_beta_30(self):
+    """test 1.2.3.4b30 version string"""
+    self.c = get_prerelease_suffix('1.2.3.4b30')
+    self.assertEqual(self.c, ' 1.2.3.4 Beta 30')
+
+  def test_release_1(self):
+    """test 1.2.3.4 version string"""
+    self.c = get_prerelease_suffix('1.2.3.4')
+    self.assertEqual(self.c, '')
+
+  def test_alpha_1_pre(self):
+    """test 1.2a1pre version string"""
+    self.c = get_prerelease_suffix('1.2a1pre')
+    self.assertEqual(self.c, '')
+
+  def test_beta_10_pre(self):
+    """test 3.4b10pre version string"""
+    self.c = get_prerelease_suffix('3.4b10pre')
+    self.assertEqual(self.c, '')
+
+  def test_pre_0(self):
+    """test 1.2pre0 version string"""
+    self.c = get_prerelease_suffix('1.2pre0')
+    self.assertEqual(self.c, '')
+
+  def test_pre_1_b(self):
+    """test 1.2pre1b version string"""
+    self.c = get_prerelease_suffix('1.2pre1b')
+    self.assertEqual(self.c, '')
+
+  def test_a_a(self):
+    """test 1.2aa version string"""
+    self.c = get_prerelease_suffix('1.2aa')
+    self.assertEqual(self.c, '')
+
+  def test_b_b(self):
+    """test 1.2bb version string"""
+    self.c = get_prerelease_suffix('1.2bb')
+    self.assertEqual(self.c, '')
+
+  def test_a_b(self):
+    """test 1.2ab version string"""
+    self.c = get_prerelease_suffix('1.2ab')
+    self.assertEqual(self.c, '')
+
+  def test_plus(self):
+    """test 1.2+ version string """
+    self.c = get_prerelease_suffix('1.2+')
+    self.assertEqual(self.c, '')
+
+if __name__ == '__main__':
+  mozunit.main()