Fix --debug handling in the shell

This sets the debug level globally on root logger so that every debug
calls are logged.

Change-Id: Ia8d61f213b2bc6c4bcb1038e7ff6ac0104581b4b
Closes-Bug: #1259210

keystoneclient/shell.py

@@ -26,6 +26,7 @@ from __future__ import print_function
 
 import argparse
 import getpass
+import logging
 import os
 import six
 import sys
@@ -379,6 +380,9 @@ class OpenStackIdentityShell(object):
             self.do_bash_completion(args)
             return 0
 
+        if args.debug:
+            logging.basicConfig(level=logging.DEBUG)
+
         # TODO(heckj): supporting backwards compatibility with environment
         # variables. To be removed after DEVSTACK is updated, ideally in
         # the Grizzly release cycle.

keystoneclient/tests/test_shell.py

@@ -14,6 +14,7 @@
 
 import argparse
 import json
+import logging
 import os
 import sys
 import uuid
@@ -117,6 +118,15 @@ class ShellTest(utils.TestCase):
                 exceptions.CommandError, 'Expecting'):
             self.shell('user-list')
 
+    def test_debug(self):
+        logging_mock = mock.MagicMock()
+        with mock.patch('logging.basicConfig', logging_mock):
+            self.assertRaises(exceptions.CommandError,
+                              self.shell, '--debug user-list')
+            self.assertTrue(logging_mock.called)
+            self.assertEqual([(), {'level': logging.DEBUG}],
+                             list(logging_mock.call_args))
+
     def test_auth_password_authurl_no_username(self):
         with testtools.ExpectedException(
                 exceptions.CommandError,