[
  {
    "id": "trailing-comma",
    "input": "{\"a\":1,}",
    "expected": null
  },
  {
    "id": "single-quotes",
    "input": "{'a':1}",
    "expected": null
  },
  {
    "id": "unquoted-key",
    "input": "{a:1}",
    "expected": null
  },
  {
    "id": "comment",
    "input": "{\"a\":1/* note */}",
    "expected": null
  },
  {
    "id": "unterminated-string",
    "input": "{\"a\":\"unfinished}",
    "expected": null
  },
  {
    "id": "leading-zero",
    "input": "{\"a\":01}",
    "expected": null
  },
  {
    "id": "nan",
    "input": "{\"a\":NaN}",
    "expected": null
  },
  {
    "id": "undefined",
    "input": "{\"a\":undefined}",
    "expected": null
  },
  {
    "id": "extra-brace",
    "input": "{\"a\":1}}",
    "expected": null
  },
  {
    "id": "missing-colon",
    "input": "{\"a\" 1}",
    "expected": null
  },
  {
    "id": "valid-nested",
    "input": "{\"items\":[1,true,null],\"name\":\"café\"}",
    "expected": "{\"items\":[1,true,null],\"name\":\"café\"}"
  },
  {
    "id": "duplicate-key",
    "input": "{\"role\":\"reader\",\"role\":\"editor\"}",
    "expected": "{\"role\":\"editor\"}"
  },
  {
    "id": "unsafe-integer",
    "input": "{\"id\":9007199254740993}",
    "expected": "{\"id\":9007199254740992}"
  },
  {
    "id": "string-id",
    "input": "{\"id\":\"9007199254740993\"}",
    "expected": "{\"id\":\"9007199254740993\"}"
  }
]