Junit @Rule 如何工作? [英] How does Junit @Rule work?

问题描述

我想为大量代码编写测试用例，我想知道JUnit@Rule注解特性的细节，以便我可以用它来编写测试用例.请提供一些好的答案或链接，通过一个简单的例子详细说明其功能.

I want to write test cases for a bulk of code, I would like to know details of JUnit @Rule annotation feature, so that I can use it for writing test cases. Please provide some good answers or links, which give detailed description of its functionality through a simple example.

推荐答案

规则用于添加适用于测试类中所有测试的附加功能，但以更通用的方式.

Rules are used to add additional functionality which applies to all tests within a test class, but in a more generic way.

例如，ExternalResource 在测试方法之前和之后执行代码，无需使用@Before 和@After.使用 ExternalResource 而不是 @Before 和 @After 为更好的代码重用提供了机会；两个不同的测试类可以使用相同的规则.

For instance, ExternalResource executes code before and after a test method, without having to use @Before and @After. Using an ExternalResource rather than @Before and @After gives opportunities for better code reuse; the same rule can be used from two different test classes.

设计基于:JUnit 中的拦截器

有关更多信息，请参阅JUnit wiki:规则.

For more information see JUnit wiki : Rules.

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