Add zaza tests for cert renewals for ovn-central

Author: arif-ali

zaza/openstack/charm_tests/ovn/tests.py

@@ -15,6 +15,8 @@
 """Encapsulate OVN testing."""
 
 import logging
+import unittest
+from time import sleep
 
 import juju
 
@@ -1101,3 +1103,46 @@ def test_cluster_downscale(self):
         leader_sb, leader_nb = self._get_server_ids(leader_unit)
         self._remove_unit(leader_unit)
         self._assert_servers_cleanly_removed(leader_sb, leader_nb)
+
+
+class OVNCentralSSLExpireTests(test_utils.BaseCharmTest):
+    """Tests for SSL Expiration and renewal actions."""
+
+    def test_check_ssl_expire(self):
+        """Test unit is able to renew a certificate, even if it is expired.
+
+        When the cert expires, then the unit should go into blocked state, and
+        a reissue should then be able to update the certificate.
+        """
+        vault_actions = zaza.model.get_actions("vault")
+
+        if 'reissue-certificates' not in vault_actions:
+            raise unittest.SkipTest('Action not defined')
+
+        with self.config_change(
+                {},
+                {'default-ttl': '1m'},
+                application_name='vault',
+                reset_to_charm_default=True):
+            zaza.model.run_action_on_leader(
+                'vault',
+                'reissue-certificates',
+                action_params={})
+
+            for unit in zaza.model.get_units(self.application_name):
+                zaza.model.block_until_unit_wl_message_match(
+                    unit.entity_id,
+                    '.*certificate verify failed: certificate has expired.*')
+
+        # Sleeping 10 seconds for the config to be reverted, so that the below
+        # action can be issued.
+        sleep(10)
+
+        # Now that the certs have expired, and the default-ttl is set back to
+        # default and reissue-certs
+        zaza.model.run_action_on_leader(
+            'vault',
+            'reissue-certificates',
+            action_params={})
+
+        zaza.model.block_until_all_units_idle()