{
  "version": 8,
  "metadata": {
    "test": {
      "height": 64,
      "width": 64
    }
  },
  "center": [ 0, 0 ],
  "zoom": 0,
  "sources": {
    "point": {
      "type": "geojson",
      "data": {
        "type": "FeatureCollection",
        "features": [
          {
            "type": "Feature",
            "properties": { "x": "uppercase" },
            "geometry": {
              "type": "Point",
              "coordinates": [ 0, -10 ]
            }
          },
          {
            "type": "Feature",
            "properties": { "x": "lowercase" },
            "geometry": {
              "type": "Point",
              "coordinates": [ 0, 10 ]
            }
          }
        ]
      }
    }
  },
  "glyphs": "local://glyphs/{fontstack}/{range}.pbf",
  "layers": [
    {
      "id": "text",
      "type": "symbol",
      "source": "point",
      "layout": {
        "text-field": "hello",
        "text-transform": {
          "type": "identity",
          "property": "x"
        },
        "text-font": [
          "Open Sans Semibold",
          "Arial Unicode MS Bold"
        ]
      }
    }
  ]
}