Allow `test` command to use conf files

It should be possible to run the `test` command with a custom config.
This allows examination of the XML outputted where config settings can
change the outputted XML. Otherwise any non-default config values will
only be used when running the `update` comand.

Add a simple test to confirm that the custom url that is unlikely to
ever be a valid default value is returned when the command is set to
`test` and a custom config is specified.

Change-Id: I193e83314a35943406bff5b182f20693edd640ba

jenkins_jobs/cmd.py

@@ -118,12 +118,12 @@ def setup_config_settings(options):
     config = ConfigParser.ConfigParser()
     ## Load default config always
     config.readfp(cStringIO.StringIO(DEFAULT_CONF))
-    if options.command == 'test':
-        logger.debug("Not reading config for test output generation")
-    elif os.path.isfile(conf):
+    if os.path.isfile(conf):
         logger.debug("Reading config from {0}".format(conf))
         conffp = open(conf, 'r')
         config.readfp(conffp)
+    elif options.command == 'test':
+        logger.debug("Not requiring config for test output generation")
     else:
         raise JenkinsJobsException(
             "A valid configuration file is required when not run as a test"

tests/cmd/fixtures/cmd-001.conf

@@ -0,0 +1,2 @@
+[jenkins]
+url=http://test-jenkins.with.non.default.url:8080/

tests/cmd/test_cmd.py

@@ -83,3 +83,18 @@ class CmdTests(testtools.TestCase):
                                           'r',
                                           'utf-8').read()
         self.assertEqual(console_out.getvalue(), xml_content)
+
+    def test_config_with_test(self):
+        """
+        Run test mode and pass a config file
+        """
+        args = self.parser.parse_args(['--conf',
+                                       os.path.join(self.fixtures_path,
+                                                    'cmd-001.conf'),
+                                       'test',
+                                       os.path.join(self.fixtures_path,
+                                                    'cmd-001.yaml'),
+                                       'foo-job'])
+        config = cmd.setup_config_settings(args)
+        self.assertEqual(config.get('jenkins', 'url'),
+                         "http://test-jenkins.with.non.default.url:8080/")