https://github.com/reworkcss/css is an interesting project and `test` cases are full of interesting css rules | declarations… so I decided to take all css into one file! you need to put this file into their repo root to run it.

get_all_css_test.js

'use strict';

var fs = require('fs');
var path = require('path');
var shell = require('shelljs');
var CWD = path.resolve( process.cwd() );
var dir_test = path.join(CWD, 'test', 'cases');

var result = [];

var list = shell
    .find(dir_test)
    .filter( function (path) {return path.match( /input\.css$/ );} );

list.forEach(function (path) {
    result.push( fs.readFileSync(path).toString() );
});

console.log( result.join('\n') );