{
  "expression": {
    "type": "interval",
    "property": "p",
    "stops": [[0, "0"], [1, "1"]],
    "default": "default"
  },
  "propertySpec": {
    "type": "string",
    "property-type": "data-driven",
    "expression": {"interpolated": true, "parameters": ["zoom", "feature"]}
  },
  "inputs": [
    [{}, {"properties": {}}],
    [{}, {"properties": {"p": -1}}],
    [{}, {"properties": {"p": 0}}],
    [{}, {"properties": {"p": 0.5}}],
    [{}, {"properties": {"p": 1}}],
    [{}, {"properties": {"p": 2}}],
    [{}, {"properties": {"p": "0"}}]
  ],
  "expected": {
    "compiled": {
      "result": "success",
      "isFeatureConstant": false,
      "isZoomConstant": true,
      "type": "string"
    },
    "outputs": ["default", "0", "0", "0", "1", "1", "default"],
    "serialized": [
      "case",
      ["==", ["typeof", ["get", "p"]], "number"],
      ["step", ["number", ["get", "p"]], "0", 1, "1"],
      "default"
    ]
  }
}