Run your mocha unit tests suite via casper.js

unit.js

// get a Casper object.
// See http://casperjs.org/
var casper = require('casper').create();

// this will be evaluated inside the context of the window.
// See http://casperjs.org/api.html#casper.evaluate for notes on
// the difference between casper's running environment and the 
// DOM environment of the loaded page.
function testReporter(){
  // casper is webkit, so we have good DOM methods. You're
  // probably unfamiliar with them because of shitty DOMs
  // in shitty browsers.  `test` is the class applied 
  // to passing tests in mocha. If you're using a different
  // runner, you'll need to figure out how to extract this
  // this kind of data from the report.
  var testNodes = document.querySelectorAll('.test');
  
  // testNodes is a NodeList so has no useful array methods,
  // but we can apply them, I'm returning an object that will
  // be used later:
  // {
  //    didPass: true
  //    text: 'The assertion of this test'
  // }
  return Array.prototype.map.call(testNodes, function(aTest){
    // in mocha, a passed test has a class `pass`. Normally a 
    // match will return an array of matches, which is `!!`ed
    // into an appropriate boolean.
    // the assertion of the test is stored in an `h2`
    return {
      didPass: !!aTest.getAttribute('class').match(/pass/),
      text: aTest.querySelector('h2').innerHTML
    }
  })
};

// open the casper's browser and load a url. This url should be
// where ever your unit tests are being displayed.
casper.start('http://localhost:9292/unit.html');

// casper.then is a promise. It ensures specific execution order.
// give 'javascript promise' a google for some reading.
casper.then(function(){
  
  // this.evaluate runs the specified function inside the context
  // of the page that casper is accessing. Think of it like popping
  // open the console in Firebug or Webkit Inspector.
  // the return value of `evaluate` here is array of tests.
  this.evaluate(testReporter).forEach(function(assertion){
    // loop through the test, calling casper's `assert` method
    // which will print to the console.
    this.test.assert(assertion.didPass, assertion.text);
  },this);
});

// run all the `then`s and call `test.renderResults` when they're done.
casper.run(function(){
  this.test.renderResults(true);
})

Thanks for the gist which is very nice for checking the test results