[
  {
    "name": "body-error",
    "replace": [
      "() => { 1 }",
      "() => { \"bad\" }"
    ]
  },
  {
    "name": "revert"
  },
  {
    "name": "signature",
    "replace": [
      "helper() -> u32 { 1 }",
      "helper() -> bool { 1 }"
    ]
  },
  {
    "name": "new-fn",
    "append": "\nfn added() { let _: u32 = \"bad\"; }\n"
  },
  {
    "name": "unresolved",
    "replace": [
      "() => { 1 }",
      "() => { missing() }"
    ]
  }
]