@learnreact—React on Rails: Testing with Jest

package.json

{
  "scripts": {
    "test": "jest"
  },
  "jest": {
    "scriptPreprocessor": "<rootDir>/preprocessor.js",
    "unmockedModulePathPatterns": ["<rootDir>/node_modules/react"]
  }
}

preprocessor.js

var ReactTools = require(‘react-tools’);
module.exports = {
  process: function(src) {
    return ReactTools.transform(src);
  }
};