MapComplete/test/Logic/FeatureSource/ClusteringFeatureSource.spec.ts

import { FeatureCollection, Point } from "geojson"
import { describe, it } from "vitest"
import StaticFeatureSource from "../../../src/Logic/FeatureSource/Sources/StaticFeatureSource"
import {
    ClusterGrouping,
    ClusteringFeatureSource
} from "../../../src/Logic/FeatureSource/TiledFeatureSource/ClusteringFeatureSource"
import { UIEventSource } from "../../../src/Logic/UIEventSource"
import { expect } from "chai"

const points: FeatureCollection<Point> = {
    "type": "FeatureCollection",
    "features": [
        {
            "type": "Feature",
            "properties": {name: "a"},
            "geometry": {
                "coordinates": [
                    9.759318139161195,
                    55.56552169756637
                ],
                "type": "Point"
            }
        },
        {
            "type": "Feature",
            "properties": {name: "b"},
            "geometry": {
                "coordinates": [
                    9.759768615515327,
                    55.56569930560951
                ],
                "type": "Point"
            }
        },
        {
            "type": "Feature",
            "properties": {name: "c"},
            "geometry": {
                "coordinates": [
                    9.75879327221594,
                    55.56569229478089
                ],
                "type": "Point"
            }
        },
        {
            "type": "Feature",
            "properties": {name: "d"},
            "geometry": {
                "coordinates": [
                    9.759380131319915,
                    55.56507066300628
                ],
                "type": "Point"
            }
        }
    ]
}

describe("ClusteringFeatureSource", () => {
    it("smallTest", () => {
        const source = new StaticFeatureSource(points.features)
        const zoom = new UIEventSource(19)
        // On zoomlevel 19, all points are in a different tile
        const clusteringSource = new ClusteringFeatureSource(source, zoom, "test", {
            cutoff: 2,
            dontClusterAboveZoom: 100
        })
        const allClusters = ClusterGrouping.singleton.features
        expect(allClusters.data.length).to.eq(0)
        expect(clusteringSource.features.data.length).to.eq(4)

        zoom.set(13)

        expect(allClusters.data.length).to.eq(1)
        expect(allClusters.data[0].properties["total_metric"]).to.eq("4")
        expect(clusteringSource.features.data.length).to.eq(0)




    })
})