Compute API Instance Usage Audit Log Test.

Adds test for instance usage audit log policy actions [1].

[1] https://github.com/openstack/nova/blob/master/nova/policies/instance_usage_audit_log.py

Change-Id: If6ba7d2db26e02d8dc417bb238ae11e446cf24f0
diff --git a/patrole_tempest_plugin/tests/api/compute/test_instance_usages_audit_log_rbac.py b/patrole_tempest_plugin/tests/api/compute/test_instance_usages_audit_log_rbac.py
new file mode 100644
index 0000000..b37f74f
--- /dev/null
+++ b/patrole_tempest_plugin/tests/api/compute/test_instance_usages_audit_log_rbac.py
@@ -0,0 +1,50 @@
+# Copyright 2017 AT&T Corporation.
+# All Rights Reserved.
+#
+#    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 decorators
+from tempest import test
+
+from patrole_tempest_plugin import rbac_rule_validation
+from patrole_tempest_plugin.rbac_utils import rbac_utils
+from patrole_tempest_plugin.tests.api.compute import rbac_base
+
+
+class InstanceUsagesAuditLogAdminRbacTest(
+        rbac_base.BaseV2ComputeAdminRbacTest):
+
+    @classmethod
+    def skip_checks(cls):
+        super(InstanceUsagesAuditLogAdminRbacTest, cls).skip_checks()
+        if not test.is_extension_enabled('os-instance-usage-audit-log',
+                                         'compute'):
+            msg = "os-instance-usage-audit-log extension not enabled."
+            raise cls.skipException(msg)
+
+    @classmethod
+    def setup_clients(cls):
+        super(InstanceUsagesAuditLogAdminRbacTest, cls).setup_clients()
+        cls.client = cls.instance_usages_audit_log_client
+
+    def tearDown(self):
+        rbac_utils.switch_role(self, switchToRbacRole=False)
+        super(InstanceUsagesAuditLogAdminRbacTest, self).tearDown()
+
+    @decorators.idempotent_id('c80246c0-5c13-4ab0-97ba-91551cd53dc1')
+    @rbac_rule_validation.action(
+        service="nova", rule="os_compute_api:os-instance-usage-audit-log")
+    def test_list_instance_usage_audit_logs(self):
+        rbac_utils.switch_role(self, switchToRbacRole=True)
+        self.client.list_instance_usage_audit_logs()
+        ["instance_usage_audit_logs"]