Add test cases for help

Fixes: https://pagure.io/koji/issue/3651

tests/test_cli/test_show_groups.py

@@ -0,0 +1,71 @@
+from __future__ import absolute_import
+
+import mock
+
+from koji_cli.commands import anon_handle_show_groups
+from . import utils
+
+
+class TestShowGroups(utils.CliTestCase):
+
+    def setUp(self):
+        self.maxDiff = None
+        self.options = mock.MagicMock()
+        self.session = mock.MagicMock()
+        self.ensure_connection_mock = mock.patch('koji_cli.commands.ensure_connection').start()
+        self.error_format = """Usage: %s show-groups [options] <tag>
+(Specify the --help global option for a list of other help options)
+
+%s: error: {message}
+""" % (self.progname, self.progname)
+        self.tag = 'test-tag'
+
+    def test_show_groups_incorrect_num_of_args(self):
+        arguments = []
+        self.assert_system_exit(
+            anon_handle_show_groups,
+            self.options, self.session, arguments,
+            stdout='',
+            stderr=self.format_error_message('Incorrect number of arguments'),
+            exit_code=2,
+            activate_session=None)
+        self.ensure_connection_mock.assert_not_called()
+
+    def test_show_groups_show_blocked_and_comps(self):
+        arguments = ['--show-blocked', '--comps', self.tag]
+        self.assert_system_exit(
+            anon_handle_show_groups,
+            self.options, self.session, arguments,
+            stdout='',
+            stderr=self.format_error_message(
+                "--show-blocked doesn't make sense for comps/spec output"),
+            exit_code=2,
+            activate_session=None)
+        self.ensure_connection_mock.assert_not_called()
+
+    def test_show_groups_show_blocked_and_spec(self):
+        arguments = ['--show-blocked', '--spec', self.tag]
+        self.assert_system_exit(
+            anon_handle_show_groups,
+            self.options, self.session, arguments,
+            stdout='',
+            stderr=self.format_error_message(
+                "--show-blocked doesn't make sense for comps/spec output"),
+            exit_code=2,
+            activate_session=None)
+        self.ensure_connection_mock.assert_not_called()
+
+    def test_show_groups_help(self):
+        self.assert_help(
+            anon_handle_show_groups,
+            """Usage: %s show-groups [options] <tag>
+(Specify the --help global option for a list of other help options)
+
+Options:
+  -h, --help      show this help message and exit
+  --comps         Print in comps format
+  -x, --expand    Expand groups in comps format
+  --spec          Print build spec
+  --show-blocked  Show blocked packages
+""" % self.progname)
+        self.ensure_connection_mock.assert_not_called()