Function spawn

packages/engine/src/services/chunkEncoder.test.ts:79–83

(command: string, args: readonly string[])

} {
  const calls: SpawnCall[] = [];
  const spawn = (command: string, args: readonly string[]): FakeProc => {
    const proc = createFakeProc();
    calls.push({ command, args, proc });
    return proc;
  };
  return { spawn, calls };
}