mocha_runner.js

/**
 * mocha_runner.js — Simple Mocha Runner for ES6
 *
 * Test your ES6 code with Mocha
 * 
 * In package.json: "test": "babel-node run_mocha.js"
 *
 * Written by Misha Tavkhelidze <[email protected]>
 *
 * Copyright (c) 2016 Misha Tavkhelidze
 */

// This can be put in a separate config file and then imported.
const conf = {
    test: {
        dirs: [
            'test',
            'src'
        ],
        extensions: [
            '.js'
        ],
        // remove or leave empty to match all
        pattern: '.spec'
    }
};

'use strict';

import d_tree from 'directory-tree';
import _ from 'lodash';
import path from 'path';
import Mocha from 'mocha';

const find_files = item => {
    if(_.isObject(item)) {
        if(_.isArray(item.children))
            return item.children.reduce((a, b) => a.concat(find_files(b)), []);
        if(item.path.includes(const.test.pattern))
            return [item];
    }
    return [];
};

const file_list = (root, dirs) => {
    return dirs.map(dir => path.join(root, dir))
        .reduce((a, b) => a.concat(find_files(
            d_tree(b, conf.test.extensions)
        )), [])
        .map(file => file.path);
};

// this is the path npm is run from
const root = path.resolve('.');
const files = file_list(root, conf.test.dirs);
const mocha = new Mocha();

files.map(f => mocha.addFile(f));
mocha.run(() => {});