/**
* Ensures a valid configuration was supplied. If not
* causes ParaTest to print the error message and exit immediately
* with an exit code of 1
*/
protected function verifyConfiguration()
{
if (isset($this->options->filtered['configuration']) && !file_exists($this->options->filtered['configuration']->getPath())) {
$this->printer->println(sprintf('Could not read "%s".', $this->options->filtered['configuration']));
exit(1);
}
}