PHPUnit_Runner_Version::getVersionString PHP Method

    public static function getVersionString()
    {
        return 'PHPUnit ' . self::id() . ' by Sebastian Bergmann and contributors.';
    }

 public function execute(InputInterface $input, OutputInterface $output)
 {
     $options = $input->getOptions();
     if ($input->getArgument('test')) {
         $options['steps'] = true;
     }
     $suite = $input->getArgument('suite');
     $test = $input->getArgument('test');
     $codecept = new \Codeception\Codecept((array) $options);
     $suites = $suite ? array($suite) : \Codeception\Configuration::suites();
     $output->writeln(\Codeception\Codecept::versionString() . "\nPowered by " . \PHPUnit_Runner_Version::getVersionString());
     if ($suite and $test) {
         $codecept->runSuite($suite, $test);
     }
     if (!$test) {
         foreach ($suites as $suite) {
             $codecept->runSuite($suite);
         }
     }
     $codecept->printResult();
     if (!$input->getOption('no-exit')) {
         if ($codecept->getResult()->failureCount() or $codecept->getResult()->errorCount()) {
             exit(1);
         }
     }
 }