gulpfile.js

var gulp = require('gulp');
var istanbul = require('gulp-istanbul');
var jasmine = require('gulp-jasmine');
var coveralls = require('gulp-coveralls');

gulp.task('test', function (cb) {    
  gulp.src([
      'src/app.js',
      'src/routes/*.js'      
    ])
    .pipe(istanbul({includeUntested: true})) // Covering files
    .pipe(istanbul.hookRequire()) // Force `require` to return covered files
    .on('finish', function() {
      gulp.src(['spec/AppSpec.js'])
        .pipe(jasmine())
        .pipe(istanbul.writeReports()) // Creating the reports after tests ran        
        // .pipe(istanbul.enforceThresholds({ thresholds: { global: 70 } })) // Enforce a coverage of at least 90%                
        .on('end', cb);        
      })
});

gulp.task('coveralls', ['test'], function(cb) {
  gulp.src('./coverage/lcov.info')
    .pipe(coveralls());
});