[
  {
    "command": "python3 json_probe.py valid.json",
    "input": "{\"setting\":1}",
    "exit": 0,
    "stdout": "OK: object with 1 keys\n",
    "stderr": ""
  },
  {
    "command": "python3 json_probe.py broken.json",
    "input": "{",
    "exit": 2,
    "stdout": "PARSE ERROR: JSONDecodeError\n",
    "stderr": ""
  },
  {
    "command": "python3 json_probe.py array.json",
    "input": "[]",
    "exit": 3,
    "stdout": "SHAPE ERROR: expected an object\n",
    "stderr": ""
  }
]