test.json

{
  "expression": ["distance", {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "MultiPoint",
        "coordinates": [[103.88174057006836, 1.3316290644037233], [103.88568878173828, 1.330084528768254], [103.88139724731446, 1.3288832226055889], [103.88448715209961, 1.3271670699311869], [103.88156890869139, 1.3263089931473214], [103.88895034790039, 1.3285399921660488], [103.91641616821289, 1.360631830379095], [103.91899108886719, 1.3602886044036287], [103.91710281372069, 1.3596021523062254], [103.91435623168946, 1.3620047337924648], [103.91332626342774, 1.3599453783793346], [103.95761489868164, 1.351021484651125], [103.95967483520508, 1.3518795527836272], [103.95538330078125, 1.3556550489612674], [103.95418167114258, 1.355483435626243], [103.95452499389649, 1.353767301607359]]
      }
    }],
  "inputs": [[{
        "zoom": 13,
        "canonicalID": {
          "z": 13,
          "x": 6460,
          "y": 4065
        }
      }, {
        "geometry": {
          "type": "LineString",
          "coordinates": [[103.88373613357544, 1.3323584281174479], [103.88704061508179, 1.3331092434795238], [103.88867139816284, 1.3334739251442105], [103.88972282409668, 1.3337957030387755], [103.89111757278441, 1.334331999436213], [103.89274835586547, 1.3351900734288747], [103.89476537704467, 1.3366702503621644]]
        }
      }], [{
        "zoom": 13,
        "canonicalID": {
          "z": 13,
          "x": 6460,
          "y": 4065
        }
      }, {
        "geometry": {
          "type": "LineString",
          "coordinates": [[103.90201807022095, 1.3571781167763333], [103.90379905700684, 1.3606103787570532], [103.90506505966187, 1.363012959238619], [103.9055585861206, 1.3638924747085997], [103.90648126602173, 1.365887472021871], [103.90686750411988, 1.3668527927080132]]
        }
      }], [{
        "zoom": 13,
        "canonicalID": {
          "z": 13,
          "x": 6460,
          "y": 4065
        }
      }, {
        "geometry": {
          "type": "LineString",
          "coordinates": [[103.95070552825928, 1.3499059956258364], [103.95280838012696, 1.3506782573132619], [103.95396709442139, 1.3515792289717337], [103.95486831665039, 1.3527376206128572], [103.95525455474852, 1.3542392385837099], [103.95538330078125, 1.35514020891972]]
        }
      }]],
  "expected": {
    "outputs": [236.275, 968.383, 56.9283],
    "serialized": ["distance", {
        "properties": {},
        "geometry": {
          "type": "MultiPoint",
          "coordinates": [[103.88174057006836, 1.3316290644037233], [103.88568878173828, 1.330084528768254], [103.88139724731446, 1.3288832226055889], [103.88448715209961, 1.3271670699311869], [103.88156890869139, 1.3263089931473214], [103.88895034790039, 1.3285399921660488], [103.91641616821289, 1.360631830379095], [103.91899108886719, 1.3602886044036287], [103.91710281372069, 1.3596021523062254], [103.91435623168946, 1.3620047337924648], [103.91332626342774, 1.3599453783793346], [103.95761489868164, 1.351021484651125], [103.95967483520508, 1.3518795527836272], [103.95538330078125, 1.3556550489612674], [103.95418167114258, 1.355483435626243], [103.95452499389649, 1.353767301607359]]
        },
        "type": "Feature"
      }],
    "compiled": {
      "type": "number",
      "isFeatureConstant": false,
      "isZoomConstant": true,
      "result": "success"
    }
  }
}