Increase coverage of CLI unit tests

tests/test_cli/test_spin_commands.py

@@ -1,9 +1,10 @@
 from __future__ import absolute_import
-import mock
-import six
 
 import unittest
 
+import six
+import mock
+
 import koji
 from koji_cli.commands import handle_spin_livecd, handle_spin_livemedia, handle_spin_appliance, \
     _build_image
@@ -359,6 +360,20 @@ class TestSpinLiveMedia(utils.CliTestCase):
         self.assertDictEqual(empty_opts, args[1].__dict__)
         self.assertEqual(args[-1], 'livemedia')
 
+    def test_handle_spin_livemedia_longer_volid(self):
+        """Test handle_spin_livemedia function"""
+        volid = 'extra-long-volid-in-spin-livemedia-cli-command'
+        expected = self.format_error_message(
+            'Volume ID has a maximum length of 32 characters')
+        args = ['name', 'version', 'target', 'arch', 'file.ks', '--volid', volid]
+        self.assert_system_exit(
+            handle_spin_livemedia,
+            self.options,
+            self.session,
+            args,
+            stderr=expected,
+            activate_session=None)
+
     @mock.patch('koji_cli.commands._build_image')
     def test_handle_spin_livemedia_argument_error(self, build_image_mock):
         """Test handle_spin_livemedia function argument error"""