什么是用于单元测试的好的无效IP地址？ [英] what is a good invalid IP address to use for unit tests?

问题描述

我正在为客户端库编写单元测试。我想测试连接无效端口和无效的IP。什么是一个好的IP地址使用，不会在某个地方被路由？我不想对运行单元测试的机器的网络做出任何假设。 LOCALHOST似乎是一个糟糕的选择，因为这是运行服务器组件的有效机器，我想分别测试一个无效的端口。是否在IPv4规范中的某处保留了INVALID-IP？

I am writing unit tests for a client library. I want to test connecting with an invalid port and an invalid ip. What is a good ip address to use that won't potentially be routed somewhere? I don't want to make any assumptions about the network the machine running the unit tests is on. LOCALHOST seems like a bad choice since that is the valid machine running the server component and I want to test an invalid port separately. Is there an INVALID-IP reserved somewhere in the IPv4 spec?

推荐答案

根据 RFC 5737 ：

块192.0.2.0/24（TEST-NET -1），198.51.100.0/24（TEST-NET-2），
和203.0.113.0/24（TEST-NET-3）用于文档。

The blocks 192.0.2.0/24 (TEST-NET-1), 198.51.100.0/24 (TEST-NET-2), and 203.0.113.0/24 (TEST-NET-3) are provided for use in documentation.

这意味着您可以使用以下范围内的IP地址：

This means you can use pick an IP address from these ranges:

• 192.0 .2.0 - 192.0.2.255


• 198.51.100.0 - 198.51.100.255


• 203.0.113.0 - 203.0.113.255

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