Spawn-mocha-parallel NPM

spawn-mocha-parallel

This let you run your test in parallel by spawning several child processes. It was designed to be used with gulp, but since it relies only on npm, it may be used within various configuration.

Credits

This was originaly a fork of gulp-spawn-mocha but has deviated a lot since then.

Usage

Using built in mochaStream:

var mochaStream = require('spawn-mocha-parallel').mochaStream;

var mocha = mochaStream({concurrency: 10});

gulp.task('test-mocha', function() {
  gulp.src('**/*-specs.js', {read: false}) 
    .pipe(mocha)
    .on('error', console.error)
});

Using SpawnMocha

var SpawnMocha = require('spawn-mocha-parallel').SpawnMocha,
    _ = require('lodash');
    through = require('through');

// customize output as you need
function mochaStream(opts) {
  opts = opts || {};
  var spawnMocha = new SpawnMocha(opts);
  var stream = through(function write(file) {
    spawnMocha.add(file.path);
  }, function() {});
  var errors = [];
  spawnMocha.on('error', function(err) {
    console.error(err.toString());
    errors.push(err);
  }).on('end', function() {
    if(errors.length > 0) {
      console.error('ERROR SUMMARY: ');
      _(errors).each(function(err) {
        console.error(err);
        console.error(err.stack);
      });
      stream.emit('error', "Some tests failed.");
    }
    stream.emit('end');
  });
  return stream;
}

var mocha = mochaStream({concurrency: 3});

gulp.task('test-custom-mocha', function() {
  gulp.src('**/*-specs.js', {read: false}) 
    .pipe(mocha)
    .on('error', console.error)
});