assertEquals(1, taskDefinition.getTaskListeners().size());
List<TaskListener> createListeners = taskDefinition.getTaskListener(event);
assertEquals(1, createListeners.size());
TaskListener listener = createListeners.get(0);
assertTrue(listener instanceof DelegateExpressionTaskListener);
DelegateExpressionTaskListener delegateExpressionListener = (DelegateExpressionTaskListener) listener;
assertEquals(delegateExpression, delegateExpressionListener.getExpressionText());