JavaScript Test using PHPUnit

gistfile1.txt

$ cat Cat.js 
  var Cat;

  Cat = (function() {

    function Cat(name) {
      this.name = name;
    }

    Cat.prototype.mew = function() {
      return "I am " + this.name + " mew mew..";
    };

    Cat.prototype.changeName = function(name) {
      this.name = name;
    };

    return Cat;

  })();

$ cat CatTest.php 
<?php
/**
 * Test class for Cat.
 */
class CatTest extends PHPUnit_Framework_TestCase
{
    /**
     * @var v8(JS Engine)
     */
    protected $v8;

    protected function setUp(){
        $this -> v8 = new V8Js();
        $this -> v8 -> executeString(file_get_contents('Cat.js'));
    }
    public function testMew(){
        $this -> v8 -> executeString("var cat = new Cat('tama');");
        $this -> assertEquals("I am tama mew mew..",$this -> v8 -> executeString("cat.mew()"));
    }
    public function testChangeName(){
        $this -> v8 -> executeString("var cat = new Cat('tama');");
        $this -> v8 -> executeString("cat.changeName('pochi');");
        $this -> assertEquals("I am pochi mew mew..",$this -> v8 -> executeString("cat.mew()"));
    }
}
$ phpunit CatTest.php 
PHPUnit 3.6.10 by Sebastian Bergmann.

..

Time: 0 seconds, Memory: 3.25Mb

OK (2 tests, 2 assertions)