$executor = $this->container->get(ProcessExecutor::class);

// run a single process
$executor->run('echo "hello world"');

// wait for a process
$process = $executor->start('echo "hello world"');
$process->wait();

// multiple processes
[$first, $second] = $executor->concurrently([
  'echo "hello"',
  'echo "world"',
]);


$pool = $executor->pool([
  'echo "hello"',
  'echo "world"',
]);

$pool->run();

// fake a process result
$this->process->registerProcessResult('echo *', 'hello');

// allow processes to be actually executed, this is opt-in!
$this->process->allowRunningActualProcesses('echo *', 'hello');

// prevent processes from being actually executed, needs `registerProcessResult` calls after
$this->process->preventRunningActualProcesses();

// assertions
$this->process->assertCommandRan('echo *');
$this->process->assertCommandDidNotRun('echo *');
$this->process->assertRan(fn (PendingProcess $process, ProcessResult $result) => /* .. */);