Check job before removing it

Change-Id: Ibbd4da25fac6016a0d76c8f810ac567f6fd075f1
Closes-Bug: #1782731

watcher/decision_engine/audit/continuous.py

@@ -62,10 +62,11 @@ class ContinuousAuditHandler(base.AuditHandler):
         if objects.audit.AuditStateTransitionManager().is_inactive(audit):
             # if audit isn't in active states, audit's job must be removed to
             # prevent using of inactive audit in future.
-            if self.scheduler.get_jobs():
-                [job for job in self.scheduler.get_jobs()
-                 if job.name == 'execute_audit' and
-                 job.args[0].uuid == audit.uuid][0].remove()
+            jobs = [job for job in self.scheduler.get_jobs()
+                    if job.name == 'execute_audit' and
+                    job.args[0].uuid == audit.uuid]
+            if jobs:
+                jobs[0].remove()
             return True
 
         return False

watcher/tests/decision_engine/audit/test_audit_handlers.py

@@ -446,3 +446,23 @@ class TestContinuousAuditHandler(base.DbTestCase):
         self.assertEqual(
             expected_calls,
             self.m_audit_notifications.send_action_notification.call_args_list)
+
+    @mock.patch.object(scheduling.BackgroundSchedulerService, 'get_jobs')
+    def test_is_audit_inactive(self, mock_jobs):
+        audit_handler = continuous.ContinuousAuditHandler()
+        mock_jobs.return_value = mock.MagicMock()
+        audit_handler._scheduler = mock.MagicMock()
+
+        ap_jobs = [job.Job(mock.MagicMock(), name='execute_audit',
+                           func=audit_handler.execute_audit,
+                           args=(self.audits[0], mock.MagicMock()),
+                           kwargs={}),
+                   ]
+
+        audit_handler.update_audit_state(self.audits[1],
+                                         objects.audit.State.CANCELLED)
+        mock_jobs.return_value = ap_jobs
+        is_inactive = audit_handler._is_audit_inactive(self.audits[1])
+        self.assertTrue(is_inactive)
+        is_inactive = audit_handler._is_audit_inactive(self.audits[0])
+        self.assertFalse(is_inactive)