chext/index.js

CHrome EXtension Tester

var fs = require("fs")
var TestState = require("./TestState.js")
var events = require("events");
var watchify = require('watchify');
var connect = require('gulp-connect');
var browserify = require('browserify');
var source = require('vinyl-source-stream');
var buffer = require('vinyl-buffer');
var assign = require('lodash.assign');
var tinylr = require("tiny-lr")
var gulp = require("gulp")
var WebSocket = require("ws")

// from http://stackoverflow.com/questions/11293857/fastest-way-to-copy-file-in-node-js
function copyFile(source, target, cb) {
  var cbCalled = false;

  try{
    var rd = fs.createReadStream(source);
    rd.on("error", function(err) {
      done(err);
    });
    var wr = fs.createWriteStream(target);
    wr.on("error", function(err) {
      done(err);
    });
    wr.on("close", function(ex) {
      done();
    });
    rd.pipe(wr);

    function done(err) {
      console.log("DONE", err)
      if (!cbCalled) {
        cb(err);
        cbCalled = true;
      }
    }

    } catch(e){
        console.log("try", e)
    }


}

function Chext (){
  this._events = new events.EventEmitter()
  var self = this;
  this._server = connect.server({
    root: __dirname,
    port: 9999
  });

  this._lr = tinylr()
  this._lr.listen(35729);

  this._wss = new WebSocket.Server({port:10101});

  this._wss.on('connection',function(socket){
    socket.on('message',function(msg){
      console.log("got test results from browser", msg)
      var testResult = JSON.parse(msg);
      TestState.insert(testResult);
      if (TestState.complete){
        self._events.emit("testing_complete", TestState.All())
        TestState.clear()
      }
    })
  })

  return this;
}

Chext.prototype.on = function(a1, a2, a3){
  this._events.on(a1,a2,a3)
}

function trimPath(path){
  if (path.indexOf("./") === 0 ){
    return path.substr(1)
  } else if (path.indexOf("/") !== 0){
    return "/" + path;
  }
}

Chext.prototype.watchify = function(paths){
  var self = this;
  var customOpts = {
    entries: paths.map(function(path){
      return process.cwd() + trimPath(path);
    }),
    debug: true
  };

  console.log("entries", customOpts.entries)

  var opts = assign({}, watchify.args, customOpts);
  var b = watchify(browserify(opts));

  function bundle() {
    console.log("bundle event")
    return b.bundle()
      // log errors if they happen
      .on('error', console.log.bind(console.log, 'Browserify Error'))
      .pipe(source('test.bundle.js'))
      // optional, remove if you don't need to buffer file contents
      .pipe(buffer())
      .pipe(gulp.dest(__dirname + '/mocha/'))
      .on('end',function(){
        console.log("bundle end!")
        self.refresh()
      });
  }

  b.on('update', bundle); // on any dep update, runs the bundler
  b.on('log', console.log);
  bundle()

}


Chext.prototype.refresh = function(){
  this._lr.changed({
    body: {
      files: [__dirname + "/mocha/test.bundle.js"]
    }
  });

}

module.exports = Chext;