protected function composerInstall($projectPath, OutputInterface $output)
{
$output->writeln('<info>Installing Magento 2 with Composer</info>');
$command = 'composer create-project --repository-url=https://repo.magento.com/ magento/project-community-edition public';
new ProcessCommand($command, $projectPath, $output);
$this->copyAuthFile($projectPath);
$this->setComposerBinDir($projectPath);
$this->addPhpSpecPackage($projectPath, $output);
$this->addBehatPackage($projectPath, $output);
}