{
  "expression": [
    "format",
    "a",
    {
      "font-scale": ["get", "font-scale"]
    }
  ],
  "inputs": [
    [{}, {"properties": {"font-scale": 1.5}}],
    [{}, {"properties": {"font-scale": 0.5}}]
  ],
  "expected": {
    "compiled": {
      "result": "success",
      "isFeatureConstant": false,
      "isZoomConstant": true,
      "type": "formatted"
    },
    "outputs": [
      {
        "sections": [
          {
            "text": "a",
            "image": null,
            "scale": 1.5,
            "fontStack": null,
            "textColor": null
          }
        ]
      },
      {
        "sections": [
          {
            "text": "a",
            "image": null,
            "scale": 0.5,
            "fontStack": null,
            "textColor": null
          }
        ]
      }
    ],
    "serialized": [
      "format",
      "a",
      {
        "font-scale": ["number", ["get", "font-scale"]]
      }
    ]
  }
}