gulpfile.js

'use strict';

const gulp = require('gulp');
const mocha = require('gulp-mocha');
const istanbul = require('gulp-istanbul');

gulp.task('coverage', function() {
  return gulp.src(['index.js', 'lib/*.js'])
    .pipe(istanbul())
    .pipe(istanbul.hookRequire());
});

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

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