Behat Code Coverage report

gistfile1.php

<?php
require_once('vendor/autoload.php');

$file = 'config/behat.yml';
$coverage_out = '/www/behat/reports/coverage';

use Symfony\Component\DependencyInjection\ContainerBuilder,
    Symfony\Component\Console\Input\ArrayInput,
    Symfony\Component\Console\Output\NullOutput;

use Behat\Behat\DependencyInjection\BehatExtension,
    Behat\Behat\DependencyInjection\Configuration\Loader;


$filter = new \PHP_CodeCoverage_Filter();
$filter->addDirectoryToWhitelist('features');

$coverage = new \PHP_CodeCoverage(null, $filter);
$coverage->start('Behat Coverage');

$container = new ContainerBuilder();

$loader  = new Loader($file);
$configs = $loader->loadConfiguration('default');

$basePath = \realpath(\dirname($file));

$extension = new BehatExtension($basePath);
$extension->load($configs, $container);
$container->addObjectResource($extension);

$container->compile();
$container->get('behat.console.command')->run(new ArrayInput(['--ansi' => true]), new NullOutput());

$coverage->stop();

$writer = new \PHP_CodeCoverage_Report_PHP;
$writer->process($coverage, $coverage_out.'.cov');

$writer = new \PHP_CodeCoverage_Report_HTML;
$writer->process($coverage, $coverage_out);