script to start mock server before tests

index.js

var mockserver = require('mockserver-grunt'),
    Mocha = require('mocha'),
    fs = require('fs'),
    path = require('path'),
    Karma = require('karma').Server,
    cfg = require('karma').config,
    testType = process.argv[2]

var mockserverConfig = {
  serverPort: process.env.RESIN_SUPERVISOR_PORT || 1080,
  proxyPort: 1090,
  verbose: true,
}

function isTestBrowser() {
  return testType === 'browser'
}

function isTestUndefined() {
  return testType === undefined
}

function killMock() {
  mockserver.stop_mockserver(mockserverConfig)
}

process.on('exit', function() {
  killMock()
})

process.on('uncaughtException', function() {
  killMock()
})

// Run the tests.
mockserver.start_mockserver(mockserverConfig).then(function() {
  console.log('mock Server started!')

  if (!isTestBrowser() || isTestUndefined()) {
    // Instantiate a Mocha instance.
    var mocha = new Mocha()
    var testDir = './test'

    // Add each .js file to the mocha instance
    fs.readdirSync(testDir).filter(function(file){
      // Only keep the .js files
      return file.substr(-8) === '.spec.js'
    }).forEach(function(file){
      mocha.addFile(
        path.join(testDir, file)
      )
    })

    var runner = mocha.run()

    runner.on('end', function() {
      if (!isTestBrowser()) {
        // we're just testing node.
        killMock()
      }
    })
  }

  if (isTestBrowser() || isTestUndefined()) {
    var karmaConfig = cfg.parseConfig(path.resolve(__dirname, '../karma.conf.js'), { port: 1337 })

    var karmaServer = new Karma(karmaConfig, function(exitCode) {
      process.exit(exitCode)
    })

    karmaServer.start()

    karmaServer.on('run_complete', function() {
      karmaServer.stop()
    })
  }
}).catch(function(e) {
  console.log('Mock Server Error: ', e)
})