Testacular Handlers aka Preprocessors

1.coffee

a = -> 4
b = (a,b) -> a+b

handlers.js

// Handler aka Preprocessor concept for Testacular

var fs = require('fs');
var util = require('util');

var cs = require('coffee-script');
var es = require('event-stream');


// Configuration
var filename = '1.coffee';
//var filename = 'index.html';

var options = {
  flags: 'r',
  encoding: 'utf8'
};

var coffeeOptions = {
  bare: true
};


// Sample CoffeeScript Handler
var coffee = function(file, opts) {

  // Return a stream
  return es.map(function(content, done) {
    // compile to js
    try {
      content = cs.compile(content, opts);
      done(null, content);
    } catch (error) {
      done(error);
    }
  });
};

// Sample Html2js Handler
var html2js = function(file, opts) {
  var template = 'angular.module(\'%s\', []).run(function($templateCache) {\n' +
    '  $templateCache.put(\'%s\',\n    \'%s\');\n' +
    '});\n';

  var escapeContent = function(content) {
    return content.replace(/'/g, '\\\'').replace(/\n/g, '\\n\' +\n    \'');
  };

  return es.map(function(content, done) {
    var htmlPath = file + '.js';
    done(null, util.format(template, htmlPath, htmlPath, escapeContent(content.toString())));
  });
};



// Handlers array that is just a list of streams
var handlers = [
  fs.createReadStream(filename, options),
  coffee(filename, coffeeOptions),
  //html2js(filename),
  process.stdout
];

// Here is where all the real action happens
es.pipeline.apply(this, handlers);

output

$ node stuff.js
var a, b;

a = function() {
  return 4;
};

b = function(a, b) {
  return a + b;
};