gulpfile.js

'use strict';

var gulp = require('gulp');
var mocha = require('gulp-mocha');
var istanbul = require('gulp-istanbul');
var eslint = require('gulp-eslint');

var files = {
  src: ['./lib/**/*.js'],
  test: ['./test/**/*.spec.js']
};

gulp.task('lint', function () {
  return gulp.src(files.src.concat(files.test))
    .pipe(eslint())
    .pipe(eslint.format())
    .pipe(eslint.failOnError());
});

gulp.task('test', function () {
  return gulp.src(files.test, {read: false})
    .pipe(mocha({reporter: 'dot'}));
});

gulp.task('spec', function () {
  return gulp.src(files.test, {read: false})
    .pipe(mocha({reporter: 'spec'}));
});

gulp.task('coverage', function (done) {
  gulp.src(files.src)
    .pipe(istanbul())
    .pipe(istanbul.hookRequire())
    .on('finish', function () {
      gulp.src(files.test)
        .pipe(mocha({reporter: 'dot'}))
        .pipe(istanbul.writeReports({
            dir: './coverage',
            reporters: ['lcov', 'json', 'html'],
            reportOpts: { dir: './coverage' }
          }))
        .on('end', done);
    });
});