Using with Karma + Webpack about babel-plugin-tcomb

[gcanti]

Hi @volkanunsal

I tried both with and without the plugin configured as a loader in my webpack configuration file

Not sure I'm follow: your karma configuration throws an error without babel-plugin-tcomb?

Anyway this is a configuration I'm using in a project of mine and works fine if can be useful:

devDependecies

{
  "babel": "5.8.34",
  "babel-core": "5.8.34",
  "babel-loader": "5.3.2",
  "babel-plugin-tcomb": "0.1.3",
  "isparta-loader": "1.0.0",
  "karma": "0.13.9",
  "karma-chrome-launcher": "0.2.0",
  "karma-coverage": "0.5.3",
  "karma-firefox-launcher": "0.1.4",
  "karma-tap": "1.0.3",
  "karma-webpack": "1.7.0",
  "tape": "4.2.2",
  "webpack": "1.12.9"
}

karma.conf.js

var webpack = require('webpack')
var path = require('path')

module.exports = function getConfig(config) {
  config.set({
    browserNoActivityTimeout: 30000,
    browsers: [process.env.CONTINUOUS_INTEGRATION ? 'Firefox' : 'Chrome'],
    singleRun: true,
    frameworks: ['tap'],
    files: [
      'test/index.js'
    ],
    preprocessors: {
      'test/index.js': ['webpack']
    },
    webpack: {
      node: {
        fs: 'empty'
      },
      module: {
        preLoaders: [
          // babel
          {
            test: /\.js$/,
            exclude: [
              path.resolve('src/'),
              path.resolve('node_modules/')
            ],
            loader: 'babel',
            query: { plugins: ['tcomb'] }
          },
          // code coverage
          {
            test: /\.js$/,
            include: path.resolve('src/'),
            loader: 'isparta'
          }
        ]
      },
      plugins: [
        new webpack.DefinePlugin({
          'process.env.NODE_ENV': JSON.stringify('test')
        })
      ]
    },
    webpackMiddleware: {
      noInfo: true
    },
    reporters: ['dots', 'coverage'],
    coverageReporter: {
      type: 'text'
    }
  })
}

[volkanunsal]

I narrowed down the error to the fact that some type was being used for a function declared inside another function. When I moved the function declaration to the top level, it magically started working. I'm not sure if this is a Babel issue, but it sounds like it might be.