gruntfile.js

var grunt = require("grunt");

grunt.initConfig({
  jshint: {
    all: ['src/**/*.js', '*.js', 'spec/**/*.js', '*.js'],
    options: {
      undef: true,
      node: true,
      globals: {
        require: true,
        module: true,
        setTimeout: true,
        __dirname: true,
        process: true,
        setInterval: true,
        /* MOCHA */
        it: true,
        describe: true,
        before: true,
        beforeEach: true,
        after: true,
        afterEach: true
      }
    }
  },
  mochaTest: {
    test: {
      options: {
        reporter: 'spec',
        //captureFile: 'results.txt', // Optionally capture the reporter output to a file
        quiet: false, // Optionally suppress output to standard out (defaults to false)
        clearRequireCache: false // Optionally clear the require cache before running tests (defaults to false)
      },
      src: ['spec/**/*.js']
    }
  },
  mocha_istanbul: {
    coverage: {
      src: 'spec'
    }
  },
  watch: {
    scripts: {
      files: ['src/*.js', 'spec/*.js'],
      tasks: ['test'],
      options: {
        spawn: false
      }
    }
  }
});

//Load modules
grunt.loadNpmTasks('grunt-mocha-test');
grunt.loadNpmTasks('grunt-contrib-jshint');
grunt.loadNpmTasks('grunt-mocha-istanbul');
grunt.loadNpmTasks('grunt-contrib-watch');

// Register tasks
grunt.registerTask('default', ['jshint:all', 'mochaTest', 'mocha_istanbul:coverage', 'watch']);
grunt.registerTask('test', ['jshint:all', 'mochaTest', 'mocha_istanbul:coverage']);
grunt.registerTask('coverage', ['mocha_istanbul:coverage']);