Unit Tests

Most parts of ESLint have unit tests associated with them. Unit tests are written using Mocha and are required when making contributions to ESLint. You’ll find all of the unit tests in the tests directory.

ESLint 大多部分都有与其相关的单元测试。单元测试是用Mocha写的，也是对 ESLint 做出贡献所要求的。你会在 tests 目录下发现所有的单元测试。

When you first get the source code, you need to run npm install once initially to set ESLint for development. Once you’ve done that, you can run the tests via:

当你第一次获取源码，你需要运行npm install来设置 ESLint 的开发环境。设置好之后，你可以运行测试，通过：

npm test

This automatically starts Mocha and runs all tests in the tests directory. You need only add yours and it will automatically be picked up when running tests.

这自动启动 Mocha，运行tests目录下的所有测试。你只需要添加你自己的测试，它会自动测试。

Running Individual Tests

If you want to quickly run just one test, you can do so by running Mocha directly and passing in the filename. For example:

如果你想快速的运行一个测试，可以通过直接运行 Mocha，传递一个文件名来做到。例如：

./node_modules/.bin/mocha tests/lib/rules/no-wrap-func.js

Running individual tests is useful when you’re working on a specific bug and iterating on the solution. You should be sure to run npm test before submitting a pull request.

当你工作在一个特定的 bug 和重复性的解决方案时，运行单个测试是很有用的。在提交请求之前，你应该确保运行了 npm test。