First NovaCloudController test cases

Not yet covering the same amount as nova-cloud-controller's Amulet tests.
https://launchpad.net/bugs/1828424

zaza/openstack/charm_tests/nova/tests.py

@@ -20,9 +20,10 @@ import logging
 import unittest
 
 import zaza.model
-import zaza.openstack.charm_tests.test_utils as test_utils
 import zaza.openstack.charm_tests.glance.setup as glance_setup
+import zaza.openstack.charm_tests.test_utils as test_utils
 import zaza.openstack.configure.guest
+import zaza.openstack.utilities.openstack as openstack_utils
 
 
 class BaseGuestCreateTest(unittest.TestCase):
@@ -156,6 +157,94 @@ class NovaCompute(test_utils.OpenStackBaseTest):
             self.assertFalse(int(run['Code']) == 0)
 
 
+class NovaCloudController(test_utils.OpenStackBaseTest):
+    """Run nova-cloud-controller specific tests."""
+
+    XENIAL_MITAKA = openstack_utils.get_os_release('xenial_mitaka')
+    XENIAL_NEWTON = openstack_utils.get_os_release('xenial_newton')
+    XENIAL_OCATA = openstack_utils.get_os_release('xenial_ocata')
+    BIONIC_QUEENS = openstack_utils.get_os_release('bionic_queens')
+
+    @classmethod
+    def setUpClass(cls):
+        """Run class setup for running nova-cloud-controller tests."""
+        super(NovaCloudController, cls).setUpClass()
+        cls.current_release = openstack_utils.get_os_release()
+
+    @property
+    def services(self):
+        """Return a list of services for the selected OpenStack release."""
+        services = ['nova-scheduler', 'nova-conductor']
+        if self.current_release <= self.BIONIC_QUEENS:
+            services.append('nova-api-os-compute')
+        if self.current_release <= self.XENIAL_MITAKA:
+            services.append('nova-cert')
+        if self.current_release >= self.XENIAL_OCATA:
+            services.append('apache2')
+        return services
+
+    def test_104_compute_api_functionality(self):
+        """Verify basic compute API functionality."""
+        logging.info('Instantiating nova client...')
+        keystone_session = openstack_utils.get_overcloud_keystone_session()
+        nova = openstack_utils.get_nova_session_client(keystone_session)
+
+        logging.info('Checking api functionality...')
+
+        actual_service_names = [service['binary'] for service in
+                                nova.services.list()]
+        for expected_service_name in ('nova-scheduler', 'nova-conductor',
+                                      'nova-compute'):
+            assert(expected_service_name in actual_service_names)
+
+        # Thanks to setup.create_flavors we should have a few flavors already:
+        assert(len(nova.flavors.list()) > 0)
+
+        # Just checking it's not raising and returning an iterable:
+        assert(len(nova.servers.list()) >= 0)
+
+    def test_900_restart_on_config_change(self):
+        """Checking restart happens on config change.
+
+        Change debug mode and assert that change propagates to the correct
+        file and that services are restarted as a result
+        """
+        # Expected default and alternate values
+        current_value = zaza.model.get_application_config(
+            'nova-cloud-controller')['debug']['value']
+        new_value = str(not bool(current_value)).title()
+        current_value = str(current_value).title()
+
+        set_default = {'debug': current_value}
+        set_alternate = {'debug': new_value}
+        default_entry = {'DEFAULT': {'debug': [current_value]}}
+        alternate_entry = {'DEFAULT': {'debug': [new_value]}}
+
+        # Config file affected by juju set config change
+        conf_file = '/etc/nova/nova.conf'
+
+        # Make config change, check for service restarts
+        logging.info(
+            'Setting verbose on nova-cloud-controller {}'.format(
+                set_alternate))
+        self.restart_on_changed(
+            conf_file,
+            set_default,
+            set_alternate,
+            default_entry,
+            alternate_entry,
+            self.services)
+
+    def test_901_pause_resume(self):
+        """Run pause and resume tests.
+
+        Pause service and check services are stopped then resume and check
+        they are started
+        """
+        with self.pause_resume(self.services):
+            logging.info("Testing pause resume")
+
+
 class SecurityTests(test_utils.OpenStackBaseTest):
     """nova-compute and nova-cloud-controller security tests."""