run.js

#!/usr/bin/env node
process.env.NODE_ENV = 'test';

var fs = require('fs');
var Mocha = require('mocha');
var optimist = require('optimist');
var walk_dir = require('./support/walk_dir');

var argv = optimist
    .usage("Usage: $0 -t [types] --reporter [reporter] --timeout [timeout]")
    .default({types: 'unit,functional', reporter: 'spec', timeout: 6000})
    .describe('types', 'The types of tests to run, separated by commas. E.g., unit,functional,acceptance')
    .describe('reporter', 'The mocha test reporter to use.')
    .describe('timeout', 'The mocha timeout to use per test (ms).')
    .boolean('help')
    .alias('types', 'T')
    .alias('timeout', 't')
    .alias('reporter', 'R')
    .alias('help', 'h')
    .argv;

var mocha = new Mocha({timeout: argv.timeout, reporter: argv.reporter, ui: 'bdd'});

var valid_test_types = ['unit', 'functional', 'acceptance', 'integration'];
var requested_types = argv.types.split(',');
var types_to_use = [];

valid_test_types.forEach(function (valid_test_type) {
    if (requested_types.indexOf(valid_test_type) !== -1) {
        types_to_use.push(valid_test_type);
    }
});

if (argv.help || types_to_use.length === 0) {
    console.log('\n' + optimist.help());
    process.exit();
}

var is_valid_file = function (file) {
    for (var i = 0; i < types_to_use.length; i++) {
        var test_type = types_to_use[i];
        var ext = test_type + ".js";

        if (file.indexOf(ext) !== -1) {
            return true;
        }
    }

    return false;
};

function run(cb) {
    walk_dir.walk('test', is_valid_file, function (err, files) {
        if (err) { return cb(err); }

        files.forEach(function (file) {
            mocha.addFile(file);
        });

        cb();
    });
}

run(function (err) {
    mocha.run(function (failures) {
        process.exit(failures);
    });
});