315     public function testChainedCommandsOutput($expected, $operator, $input)  argument
317         $process = $this->getProcess(sprintf('echo %s %s echo %s', $input, $operator, $input));
1199         $input = function () {
1204 …$process = $this->getProcessForCode('stream_copy_to_stream(STDIN, STDOUT);', null, null, $input());
1211         $input = new InputStream();
1214         $process->setInput($input);
1216         $process->start(function ($type, $data) use ($input) {
1218                 $input->write('pang');
1219             } elseif (!$input->isClosed()) {
1220                 $input->write('pong');
1221                 $input->close();
1245         $input = new InputStream();
1246         $input->onEmpty($stream);
1247         $input->write($stream());
1250         $process->setInput($input);
1251         $process->start(function ($type, $data) use ($input) {
1252             $input->close();
1261         $input = new InputStream();
1262         $input->onEmpty(function ($input) {
1264             $input->close();
1268         $process->setInput($input);
1270         $input->write('ping');
1278         $input = new InputStream();
1279         $input->onEmpty(function () use (&$i) { ++$i; });
1282         $process->setInput($input);
1283         $process->start(function ($type, $data) use ($input) {
1285                 $input->close();
1296         $input = new InputStream();
1299         $process->setInput($input);
1312         $input->write(345);
1332         $input = new InputStream();
1335         $process->setInput($input);
1348         $input->write(123);
1541      * @param string|null $input
1546 …private function getProcess($commandline, $cwd = null, array $env = null, $input = null, $timeout …  argument
1548         $process = new Process($commandline, $cwd, $env, $input, $timeout);
1576 …private function getProcessForCode($code, $cwd = null, array $env = null, $input = null, $timeout …  argument
1578         return $this->getProcess([self::$phpBin, '-r', $code], $cwd, $env, $input, $timeout);