Gulpfile.js

var path         = require('path');
var del          = require('del');
var gulp         = require('gulp');
var babel        = require('gulp-babel');
var eslint       = require('gulp-eslint');
var webmake      = require('gulp-webmake');
var merge        = require('merge-stream');
var listBrowsers = require('testcafe-browser-tools').getInstallations;

gulp.task('clean', function (cb) {
    del('lib', cb);
});

gulp.task('copy-vendor', ['clean'], function () {
    gulp
        .src('vendor/**/*.*')
        .pipe(gulp.dest('lib/vendor'));
});

gulp.task('build', ['lint', 'copy-vendor'], function () {
    var js = gulp
        .src(['src/**/*.js', '!src/**/*.mustache.js'])
        .pipe(babel());

    var templates = gulp
        .src('src/**/*.mustache');

    var jsTemplates = gulp
        .src('src/**/*.mustache.js')
        .pipe(webmake());

    return merge(js, templates, jsTemplates)
        .pipe(gulp.dest('lib'));
});

gulp.task('lint', function () {
    return gulp
        .src([
            'src/**/*.js',
            'test/**/*.js',
            'Gulpfile.js'
        ])
        .pipe(eslint())
        .pipe(eslint.format())
        .pipe(eslint.failAfterError());
});

gulp.task('test', ['build'], function () {
    require('./test/index');
});

gulp.task('saucelabs', ['lint', 'build'], function (done) {
    var BROWSERS = [
        {
            platform:    'Windows 10',
            browserName: 'microsoftedge'
        },
        {
            platform:    'Windows 10',
            browserName: 'chrome'
        },
        {
            platform:    'Windows 10',
            browserName: 'firefox'
        },
        {
            platform:    'Windows 10',
            browserName: 'internet explorer',
            version:     '11.0'
        },
        {
            platform:    'OS X 10.12',
            browserName: 'safari',
            version:     '11.0'
        },
        {
            platform:    'Linux',
            browserName: 'android',
            version:     '5.1',
            deviceName:  'Android Emulator'
        },
        {
            platform:    'iOS',
            browserName: 'Safari',
            version:     '10.3',
            deviceName:  'iPhone 7 Plus Simulator'
        }
    ];

    var sauceLabsSettings = {
        username:  process.env.SAUCELABS_USERNAME,
        accessKey: process.env.SAUCELABS_ACCESS_KEY,
        build:     process.env.TRAVIS_JOB_ID || 'build',
        tags:      [process.env.TRAVIS_BRANCH || 'master'],
        browsers:  BROWSERS,
        name:      'qunit-harness qunit tests',
        timeout:   60
    };

    var tests = ['/test1-test.js', '/test2-test/index-test.js', '/dir1/test3-test.js']
        .map(function (item) {
            return path.join(__dirname, '/test/tests/fixtures', item)
        });

    var afterCallbackCalled = false;

    var after = function () {
        afterCallbackCalled = true;
    };

    var server = require('./test/index');

    function testsDone (err) {
        server.close();

        if (!err && !afterCallbackCalled)
            err = 'after callback was not called';

        done(err);
    }

    server
        .saucelabs(sauceLabsSettings)
        .tests(tests)
        .after(after)
        .run()
        .then(testsDone)
        .catch(testsDone);
});

gulp.task('cli', ['lint', 'build'], function (done) {
    listBrowsers().then(function (browsers) {
        var targetBrowsers = [
            { browserInfo: browsers['chrome'], browserName: 'chrome' },
            { browserInfo: browsers['firefox'], browserName: 'firefox' }
        ];

        var cliSettings = { browsers: targetBrowsers, timeout: 60 };

        var tests = ['/test1-test.js', '/test2-test/index-test.js', '/dir1/test3-test.js']
            .map(function (item) {
                return path.join(__dirname, '/test/tests/fixtures', item)
            });

        var afterCallbackCalled = false;

        var after = function () {
            afterCallbackCalled = true;
        };

        var server = require('./test/index');

        function testsDone (err) {
            server.close();

            if (!err && !afterCallbackCalled)
                err = 'after callback was not called';

            done(err);
        }

        server
            .cli(cliSettings)
            .tests(tests)
            .after(after)
            .run()
            .then(testsDone)
            .catch(testsDone);
    });
});