{
  "expression": {"type": "identity", "property": "p"},
  "inputs": [
    [{}, {"properties": {}}],
    [{}, {"properties": {"p": "0"}}],
    [{}, {"properties": {"p": "1"}}],
    [{}, {"properties": {"p": 0}}]
  ],
  "propertySpec": {
    "type": "string",
    "property-type": "data-driven",
    "expression": {"interpolated": false, "parameters": ["zoom", "feature"]}
  },
  "expected": {
    "compiled": {
      "result": "success",
      "isFeatureConstant": false,
      "isZoomConstant": true,
      "type": "string"
    },
    "outputs": [
      {"error": "Expected value to be of type string, but found null instead."},
      "0",
      "1",
      {
        "error": "Expected value to be of type string, but found number instead."
      }
    ],
    "serialized": ["string", ["get", "p"]]
  }
}