Test krbv failing when krbV is not installed.

tests/test_krbv.py

@@ -0,0 +1,18 @@
+import unittest
+
+# This is python-mock, not the rpm mock tool we know and love
+import mock
+
+import koji
+
+
+class KrbVTestCase(unittest.TestCase):
+
+    @mock.patch('koji.krbV', new=None)
+    @mock.patch('koji.ClientSession._setup_connection')
+    def test_krbv_disabled(self, krbV):
+        """ Test that when krbV is absent, we behave rationally. """
+        self.assertEquals(koji.krbV, None)
+        session = koji.ClientSession('whatever')
+        with self.assertRaises(ImportError):
+            session.krb_login()