{
  "expression": [
    "boolean",
    ["in", ["get", "needle"], ["get", "haystack"]]
  ],
  "inputs": [
    [{}, {"properties": {"needle": 1, "haystack": 123}}],
    [{}, {"properties": {"needle": "foo", "haystack": {}}}],
    [{}, {"properties": {"needle": "foo", "haystack": null}}]
  ],
  "expected": {
    "compiled": {
      "result": "success",
      "isFeatureConstant": false,
      "isZoomConstant": true,
      "type": "boolean"
    },
    "outputs": [
      {"error":"Expected second argument to be of type array or string, but found number instead."},
      {"error":"Expected second argument to be of type array or string, but found object instead."},
      false
    ],
    "serialized": [
      "boolean",
      ["in", ["get", "needle"], ["get", "haystack"]]
    ]
  }
}