Running Behat in the Test Case of PHPUnit on Non-Symfony Application.

BehatTest.php

<?php
/**
 *
 *  @forked https://gist.github.com/1298503
 */

require_once 'behat/autoload.php';

use Symfony\Component\Console\Input\ArrayInput;
use Symfony\Component\Console\Output\ConsoleOutput;
use Behat\Behat\Console\BehatApplication;

class BehatTest
    extends \PHPUnit_Framework_TestCase
{
    /**
     * @group behat
     */
    public function testBehat()
    {
        try {
            $input = new ArrayInput(array(
                '--format' => 'progress'
            ));
            $output = new ConsoleOutput();
            $app = new BehatApplication('unknown');
            $app->setAutoExit(false);
            $result = $app->run($input, $output);
            $this->assertEquals(0, $result);
        } catch (\Exception $e) {
            $this->fail($e->getMessage());
        }
    }
}