Fix context sensitive help for info and tempurl2.2.0

Make it so that swift <cmd> --help will print the info
subcommand help for info and tempurl just like all the
other subcommands.

Also add unit tests to verify subcommand help.

Change-Id: Id3666dcf72a9727fbfda2f74c23293ada1c53aa0

1 files changed, 22 insertions, 0 deletions

diff --git a/tests/unit/test_shell.py b/tests/unit/test_shell.py
index 0bd7fda..daf4cd8 100644
--- a/tests/unit/test_shell.py
+++ b/tests/unit/test_shell.py
@@ -356,3 +356,25 @@ class TestShell(unittest.TestCase):
         connection.return_value.get_capabilities.return_value = {'swift': None}
         swiftclient.shell.main(argv)
         connection.return_value.get_capabilities.assert_called_with(None)
+
+
+class TestSubcommandHelp(unittest.TestCase):
+
+    def test_subcommand_help(self):
+        for command in swiftclient.shell.commands:
+            help_var = 'st_%s_help' % command
+            self.assertTrue(help_var in vars(swiftclient.shell))
+            out = six.StringIO()
+            with mock.patch('sys.stdout', out):
+                argv = ['', command, '--help']
+                self.assertRaises(SystemExit, swiftclient.shell.main, argv)
+            expected = vars(swiftclient.shell)[help_var]
+            self.assertEqual(out.getvalue().strip('\n'), expected)
+
+    def test_no_help(self):
+        out = six.StringIO()
+        with mock.patch('sys.stdout', out):
+            argv = ['', 'bad_command', '--help']
+            self.assertRaises(SystemExit, swiftclient.shell.main, argv)
+        expected = 'no help for bad_command'
+        self.assertEqual(out.getvalue().strip('\n'), expected)