https://github.com/jsdf/jest-alias-module-loader

https://github.com/jsdf/jest-alias-module-loader

Last synced: about 2 months ago
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• Host: GitHub
• URL: https://github.com/jsdf/jest-alias-module-loader
• Owner: jsdf
• License: mit
• Created: 2015-10-02T13:59:09.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2015-10-02T14:04:11.000Z (over 9 years ago)
• Last Synced: 2025-03-06T06:40:49.196Z (about 2 months ago)
• Language: JavaScript
• Size: 121 KB
• Stars: 3
• Watchers: 3
• Forks: 1
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# jest-alias-module-loader

Jest doesn't really have a simple way of globally replacing certain modules, but I've come up with a couple. Firstly, the hacky and gross way to [replace modules is by using a regexp replace in the preprocessor](https://github.com/facebook/react/pull/4656/files). But let's not do that. Instead, this module extends the default `HasteModuleLoader` to allow us to alias some modules at `require` time:

```js

// test/aliasedModuleLoader.js

var JestAliasModuleLoader = require('jest-alias-module-loader');

module.exports = JestAliasModuleLoader({

   aliasedModules: {

    // use compiled react for faster loading

    'react': 'react/dist/react-with-addons',

    'react/addons': 'react/dist/react-with-addons',

  },

});

```

To use this, just add a line to your Jest config (eg. in `package.json`):

```json

{

  "jest": {

    "moduleLoader": "/test/aliasedModuleLoader.js"

  }

}

```