如何在单元测试中避免Thread.sleep? [英] How to avoid Thread.sleep in Unit tests?

问题描述

让我们想象一下我应该测试以下方法:

Let's imagine I have the following method which should be tested:

@Autowired
private RoutingService routingservice;

public void methodToBeTested() {
    Object objectToRoute = initializeObjectToRoute();
    if (someConditions) {
         routingService.routeInOneWay(objectToRoute);
    } else {
         routingService.routeInAnotherWay(objectToRoute);
    }
}

在这种情况下，RoutingService在单独的线程中运行，因此在其构造函数中，我们具有以下内容:

In this case RoutingService is running in the separate thread, thus in it's constructor we have the following:

Thread thread = new Thread(this);
thread.setDaemon(true);
thread.start();

问题是RoutingService更改了objectToRoute的状态，而这正是我要检查的内容，但这并没有立即发生，因此测试失败.但是，如果我添加Thread.sleep()则可以，但是据我所知，这是一种不好的做法.

The problem is that RoutingService changes the state of objectToRoute and this is exactly what I want to check, but this doesn't happen straight away thus the test fails. However, if I add Thread.sleep() then it works, but this is bad practice as I know.

在这种情况下如何避免Thread.sleep()?

How can I avoid Thread.sleep() in this case?

推荐答案

如果您正在测试方法methodToBeTested的[单元测试]，则应该简单地模拟routingservice.
您不应该测试任何methodToBeTested调用的方法.

If you are testing [Unit Test] for the method methodToBeTested, you should simply mock routingservice.
You shouldn't be testing any methods that methodToBeTested calls.

但是，听起来您想测试RoutingService(您说问题是RoutingService更改了objectToRoute的状态，而这正是我要检查的内容").

However, it sounds like you want to test the RoutingService (you said "The problem is that RoutingService changes the state of objectToRoute and this is exactly what I want to check").

要测试RoutingService方法，应为这些方法编写单独的单元测试.

To test RoutingService methods, you should write separate unit tests for those methods.

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