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[Graham Binns <graham@xxxxxxxxxxxxx>]

Graham Binns has proposed merging lp:~gmb/charms/oneiric/buildbot-master/tests-fixes into lp:~yellow/charms/oneiric/buildbot-master/trunk.

Requested reviews:
  yello (yello)

For more details, see:
https://code.launchpad.net/~gmb/charms/oneiric/buildbot-master/tests-fixes/+merge/92089

Changes from gmb and frankban 2012-02-08:
=========================================

 - Added some tweaks to helpers.py to make testing a bit easier.
-- 
https://code.launchpad.net/~gmb/charms/oneiric/buildbot-master/tests-fixes/+merge/92089
Your team Launchpad Yellow Squad is subscribed to branch lp:~yellow/charms/oneiric/buildbot-master/trunk.

=== modified file 'hooks/helpers.py'
--- hooks/helpers.py	2012-02-07 14:37:13 +0000
+++ hooks/helpers.py	2012-02-08 17:42:17 +0000
@@ -19,9 +19,11 @@
     'unit_info',
     ]
 
+import base64
 import json
 import os
 import re
+import StringIO
 import subprocess
 import sys
 from textwrap import dedent
@@ -90,13 +92,28 @@
 
 def unit_info(service_name, item_name, data=None):
     if data is None:
-        data = yaml.safe_load(run('juju', 'status'))
-    services = data['services'][service_name]
-    units = services['units']
+        output = subprocess.check_output(['juju', 'status'], shell=False)
+        data = yaml.safe_load(output)
+    service = data['services'].get(service_name)
+    if service is None:
+        # XXX 2012-02-08 gmb:
+        #     This allows us to cope with the race condition that we
+        #     have between deploying a service and having it come up in
+        #     `juju status`. We could proably do with cleaning it up so
+        #     that it fails a bit more noisily after a while.
+        return ''
+    units = service['units']
     item = units.items()[0][1][item_name]
     return item
 
 
+def encode_file(filename):
+    """base64 encode the contents of a file and return it."""
+    with open(filename) as f:
+         contents = f.read()
+    return base64.encodestring(contents).strip()
+
+
 def grep(content, filename):
     with open(filename) as f:
         for line in f: