public void ruleUsageExample() {
RuntimeService runtimeService = activitiRule.getRuntimeService();
runtimeService.startProcessInstanceByKey("ruleUsage");
TaskService taskService = activitiRule.getTaskService();
Task task = taskService.createTaskQuery().singleResult();
assertEquals("My Task", task.getName());
taskService.complete(task.getId());
assertEquals(0, runtimeService.createProcessInstanceQuery().count());
}