common\WebTestCase::putParametersFileBack PHP Method

    protected function putParametersFileBack($kernelDir)
    {
        $filesystem = new Filesystem();
        if ($filesystem->exists($kernelDir . '/config/parameters.yml~backup')) {
            $filesystem->copy($kernelDir . '/config/parameters.yml~backup', $kernelDir . '/config/parameters.yml', true);
            $filesystem->remove($kernelDir . '/config/parameters.yml~backup');
        }
        if ($filesystem->exists($kernelDir . '/cache/test')) {
            $filesystem->remove($kernelDir . '/cache/test');
        }
    }