nodeuse/dev/isolation/component/output.js

A generic loader tool to extend Node's native require() function for better structured module and file loading.

'use strict';

const node_fs = require('fs'),
      yaml    = require('yamljs'),

      cfile   = require('./file');

module.exports = {

    /**
     *
     * @param output
     * @returns {*}
     */
    package : (output) => {

        /** @isolation */
        // reroute output to the test files
        const node_path = require('path'),
              cpackage  = require('./package');

        let rootPath     = cpackage.getPackageRootDir(),
            relativePath = output.replace(rootPath, ''),
            testDir      = '/tests/test_files';

        output = node_path.normalize(rootPath + testDir + relativePath);

        if (node_fs.existsSync(output)) {

            // if it is a regular JavaScript file, require it
            if (cfile.isJS(output)) {
                return require(output);
            }

            // if it is a JSON file, just simply require it
            if (cfile.isJSON(output)) {
                return require(output);
            }

            // if it is a YAML file, parse it accordingly and return it
            if (cfile.isYAML(output)) {
                return yaml.load(output);
            }

            // return as a regular string
            return node_fs.readFileSync(output, 'utf8');

        } else {
            throw new Error(`Package path cannot be found: "${output}"`);
        }
        /***/
    },

    /**
     *
     * @param output
     * @returns {*}
     */
    module : (output) => {

        /** @isolation */
        return require(output);
        /***/
    },

    getModulesDir : () => {

        /** @isolation */
        return '/tests/test_modules/';
        /***/
    },
};