karma.conf.js

const webpackConfig = require('./webpack.config.babel')({env: 'test'});
const testGlob = 'src/**/*.test.js';
const srcGlob = 'src/**/!(*.test|*.stub).js';

module.exports = config => {
  config.set({
    basePath: '',
    frameworks: ['mocha', 'chai'],
    files: [ testGlob, srcGlob ],
    exclude: ['src/bootstrap.js'],
    preprocessors: {
      [testGlob]: ['webpack'],
      [srcGlob]: ['webpack']
    },
    webpack: webpackConfig,
    webpackMiddleware: {noInfo: true},
    reporters: ['progress', 'coverage'],
    coverageReporter: {
      check: {
        global: {
          statements: 11,
          branches: 0,
          functions: 0,
          lines: 11
        }
      },
      reporters: [
        {type: 'lcov', dir: 'coverage/', subdir: '.'},
        {type: 'json', dir: 'coverage/', subdir: '.'},
        {type: 'text-summary'}
      ]
    },
    port: 9876,
    colors: true,
    logLevel: config.LOG_INFO,
    autoWatch: false,
    browsers: ['Chrome'],
    singleRun: true,
    concurrency: Infinity
  });
};