Add openstack client stack basic funtion tests

Based from the existing heat function tests.
Can be expanded in the future with more then
read-only tests.  For now just get the tests
working with openstack client.

Change-Id: I1b84085b89c429b4b25f75d76d5c4b7b56d25326
Blueprint: heat-support-python-openstackclient

heatclient/tests/functional/base.py

@@ -40,3 +40,6 @@ class ClientTestBase(base.ClientTestBase):
 
     def heat(self, *args, **kwargs):
         return self.clients.heat(*args, **kwargs)
+
+    def openstack(self, *args, **kwargs):
+        return self.clients.openstack(*args, **kwargs)

heatclient/tests/functional/osc/v1/test_readonly.py

@@ -0,0 +1,40 @@
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from tempest_lib import exceptions
+
+from heatclient.tests.functional import base
+
+
+class SimpleReadOnlyOpenStackClientTest(base.ClientTestBase):
+    """Basic, read-only tests for Openstack CLI client heat plugin.
+
+    Basic smoke test for the openstack CLI commands which do not require
+    creating or modifying stacks.
+    """
+
+    def test_openstack_fake_action(self):
+        self.assertRaises(exceptions.CommandFailed,
+                          self.openstack,
+                          'this-does-not-exist')
+
+    def test_openstack_stack_list(self):
+        self.openstack('stack list')
+
+    def test_openstack_stack_list_debug(self):
+        self.openstack('stack list', flags='--debug')
+
+    def test_openstack_help_cmd(self):
+        self.openstack('help stack')
+
+    def test_openstack_version(self):
+        self.openstack('', flags='--version')