{
    "expression": ["index-of", ["get", "needle"], ["get", "hay"], ["get", "i"]],
    "inputs": [
      [{}, {"properties": {"needle": null, "hay": "helloworld", "i": 0}}],
      [{}, {"properties": {"needle": "foo", "hay": "helloworld", "i": 0}}],
      [{}, {"properties": {"needle": "low", "hay": "helloworldlow", "i": 4}}],
      [{}, {"properties": {"needle": true, "hay": "falsetruetrue", "i": 6}}],
      [{}, {"properties": {"needle": false, "hay": "falsetrue", "i": 0}}],
      [{}, {"properties": {"needle": 123, "hay": "hello123world", "i": 6}}],
      [{}, {"properties": {"needle": "low", "hay": null, "i": 0}}],
      [{}, {"properties": {"needle": 7, "hay": [9, 8, 7, 8, 7, 7], "i": 3}}],
      [{}, {"properties": {"needle": 9, "hay": [9, 8, 7, 8, 7, 7], "i": 1}}],
      [{}, {"properties": {"needle": 8, "hay": [9, 8, 7, 8, 7, 7], "i": 1}}],
      [{}, {"properties": {"needle": 8, "hay": [9, 8, 7, 8, 7, 7], "i": -1}}],
      [{}, {"properties": {"needle": "foo", "hay": ["foo", "foo"], "i": -100}}],
      [{}, {"properties": {"needle": "foo", "hay": "__foo__foo", "i": -100}}],
      [{}, {"properties": {"needle": 8, "hay": [9, 8, 7, 8, 7, 7], "i": 10000}}],
      [{}, {"properties": {"needle": 8, "hay": [9, 8, 7, 8, 7, 7], "i": "wrong"}}]
    ],
    "expected": {
      "compiled": {
        "result": "success",
        "isFeatureConstant": false,
        "isZoomConstant": true,
        "type": "number"
      },
      "serialized": ["index-of", ["get", "needle"], ["get", "hay"], ["get", "i"]],
      "outputs": [
        -1,
        -1,
        10,
        9,
        0,
        -1,
        {
          "error": "Expected second argument to be of type array or string, but found null instead."
        },
        4,
        -1,
        1,
        1,
        0,
        2,
        -1,
        {
          "error": "Expected third argument to be of type number, but found string instead."
        }
      ]
    }
  }