test-promises.js

"use strict";

const co    = require('co');

co(function* () {

    let test = function(value) {
        return new Promise((resolve, reject) => {
            if (value) {
                resolve(value);
            } else {
                reject(value);
            }
        });
    };

    let result = yield test().then(res => {
        return 'yep';
    }).catch(err => {
        return 'NOWAY';
    });
    console.log(result);

}).catch(function(err) {
    if (err) {
        var error = ((typeof err.stack != 'undefined') ? err.stack: (JSON.stringify(err) + ' [no stack trace]'));
        console.log(error);
    }
    process.exit();
});