{
  "expression": ["get", "p"],
  "propertySpec": {
    "type": "string"
  },
  "inputs": [
    [{}, {"properties": {}}],
    [{}, {"properties": {"p": 0}}],
    [{}, {"properties": {"p": "a"}}]
  ],
  "expected": {
    "compiled": {
      "result": "success",
      "isFeatureConstant": false,
      "isZoomConstant": true,
      "type": "string"
    },
    "outputs": ["", "0", "a"],
    "serialized": [
      "to-string",
      ["get", "p"]
    ]
  }
}