gulpfile.js

'use strict';

var gulp = require('gulp'),
  mocha = require('gulp-mocha'),
  eslint = require('gulp-eslint'),
  istanbul = require('gulp-istanbul'),
  codacy = require('gulp-codacy'),
  debug = require('gulp-debug'),
  coveralls = require('gulp-coveralls');

gulp.task('test', ['eslint'], function() {
  return gulp
    .src('./test/**/*.js', {
      read: false,
    })
    .pipe(
      mocha({
        reporter: 'spec',
      })
    );
});

gulp.task('coverage', ['eslint'], function(done) {
  // no return, don't return the stream when callbacking
  gulp
    .src('./lib/**/*.js')
    .pipe(istanbul()) // covering files
    .pipe(istanbul.hookRequire())
    .on('finish', function() {
      gulp
        .src('./test/**/*.js')
        .pipe(
          mocha({
            reporter: 'spec',
          })
        )
        .pipe(istanbul.writeReports()) // Creating the reports after tests runned
        .on('end', done);
    });
});

gulp.task('report-coverage', function() {
  return gulp
    .src('./coverage/**/lcov.info')
    .pipe(debug())
    .pipe(coveralls());
});

gulp.task('report-codacy', function() {
  return gulp
    .src('./coverage/**/lcov.info')
    .pipe(debug())
    .pipe(codacy());
});

gulp.task('eslint', function() {
  return gulp
    .src(['./lib/**/*.js', './test/**/*.js', './example/**/*.js', './gulpfile.js'])
    .pipe(eslint())
    .pipe(eslint.format())
    .pipe(eslint.failOnError());
});

gulp.task('default', ['test']);