{
  "expression": ["join", "1+2+3", "+"],
  "inputs": [[{}, {}]],
  "expected": {
    "compiled": {
      "result": "error",
      "errors": [
        {
          "key": "",
          "error": "Expected arguments of type (array<string>, string), but found (string, string) instead."
        }
      ]
    }
  }
}