Testing mocha with flow annotations

es6-flow-transform.js

'use strict';

var fs = require('fs');
var ReactTools = require('react-tools');
var fn = module.exports = function () {
  require.extensions['.js'] = function (module, filename) {
    module._compile(
      ReactTools.transform(
        fs.readFileSync(filename, 'utf8'),
        {stripTypes: true, harmony: true}),
      filename)
  };
};

fn();

flow_globals.js

// example of a flow globals file

declare var SC: Object;

type StatesType = {[key: string]: {
  value: any;
  elem: HTMLElement;
  attach: ?{
    [key: string]: (s: StatesType, e: Event) => void};
  draw: (elem: HTMLElement, value: any) => void;
}};

package.json

{
  "name": "something-cool",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "mocha --compilers js:es6-flow-transform && flow check --lib flow/globals.js"
  },
  "author": "Ciro S. Costa <[email protected]> (http://cirocosta.github.io/)",
  "license": "MIT",
  "devDependencies": {
    "react-tools": "^0.12.2",
    "mocha": "^2.1.0"
  }
}