run Behat 3 tests as a phpunit script (to include behat in code coverage count)

Behat3Test.php

<?php

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

class BehatTest extends TestCase
{
    /**
     * @group Behat
     */
    public function testRunBehat()
    {
        $behat = (new ApplicationFactory)->createApplication();
        $behat->setAutoExit(false);

        $input = new ArrayInput(['behat', '--format', 'progress']);
        $output = new ConsoleOutput();
        $result = $behat->run($input, $output);

        $this->assertEquals(0, $result);
    }
}