denoland-deno/tests/specs/task/piped_stdin/deno.json

{
  "tasks": {
    "piped": "echo 12345 | (deno eval 'const b = new Uint8Array(1);Deno.stdin.readSync(b);console.log(b)' && deno eval 'const b = new Uint8Array(1);Deno.stdin.readSync(b);console.log(b)')"
  }
}