如何将Vue Test Utils与Jest一起添加到现有的Vue-CLI 3项目中？

Question

我想测试一个已经存在的Vue-CLI 3项目。我在创建项目时没有初始化测试预设。我搜索过，但没有找到任何合适的结果。我也阅读了文档，但它说在创建项目时添加了测试。

Answer 1

从项目根目录，输入以下命令以添加@vue/test-utils and jest：

vue add @vue/unit-jest

命令输出应该类似于：

$ vue add @vue/unit-jest

📦  Installing @vue/cli-plugin-unit-jest...

+ @vue/[email protected]
added 282 packages from 167 contributors, removed 2 packages and audited 42205 packages in 9.693s
found 63 low severity vulnerabilities
  run `npm audit fix` to fix them, or `npm audit` for details
✔  Successfully installed plugin: @vue/cli-plugin-unit-jest


🚀  Invoking generator for @vue/cli-plugin-unit-jest...
📦  Installing additional dependencies...

added 12 packages from 11 contributors, updated 1 package, moved 4 packages and audited 42427 packages in 7.895s
found 64 low severity vulnerabilities
  run `npm audit fix` to fix them, or `npm audit` for details
✔  Successfully invoked generator for plugin: @vue/cli-plugin-unit-jest
   The following files have been updated / added:

     jest.config.js
     tests/unit/.eslintrc.js
     tests/unit/example.spec.js
     package-lock.json
     package.json

   You should review these changes with git diff and commit them.