MapComplete/test/Logic/GeoOperations.spec.ts

import { GeoOperations } from "../../src/Logic/GeoOperations"
import { Feature, LineString, Polygon } from "geojson"
import { describe, expect, it } from "vitest"

describe("GeoOperations", () => {
    describe("clipWith", () => {
        it("clipWith should clip linestrings", () => {
            const bbox: Feature<Polygon> = {
                type: "Feature",
                properties: {},
                geometry: {
                    coordinates: [
                        [
                            [3.218560377159008, 51.21600586532159],
                            [3.218560377159008, 51.21499687768525],
                            [3.2207456783268356, 51.21499687768525],
                            [3.2207456783268356, 51.21600586532159],
                            [3.218560377159008, 51.21600586532159]
                        ]
                    ],
                    type: "Polygon"
                }
            }
            const line: Feature<LineString> = {
                type: "Feature",
                properties: {},
                geometry: {
                    coordinates: [
                        [3.218405371672816, 51.21499091846559],
                        [3.2208408127450525, 51.21560173433727]
                    ],
                    type: "LineString"
                }
            }
            const result = GeoOperations.clipWith(line, bbox)
            expect(result.length).to.equal(1)
            expect(result[0].geometry.type).to.eq("LineString")
            const clippedLine = (<Feature<LineString>>result[0]).geometry.coordinates
            const expCoordinates = [
                [3.2185604, 51.215029800031594],
                [3.2207457, 51.21557787977764]
            ]

            expect(clippedLine).to.deep.equal(expCoordinates)
        })
        it("clipWith should contain the full feature if it is fully contained", () => {
                const bbox: Feature<Polygon> = {
                    type: "Feature",
                    properties: {},
                    geometry: {
                        coordinates: [
                            [
                                [
                                    2.1541744759711037,
                                    51.73994420687188
                                ],
                                [
                                    2.1541744759711037,
                                    50.31129074222787
                                ],
                                [
                                    4.53247037641421,
                                    50.31129074222787
                                ],
                                [
                                    4.53247037641421,
                                    51.73994420687188
                                ],
                                [
                                    2.1541744759711037,
                                    51.73994420687188
                                ]
                            ]
                        ],
                        type: "Polygon"
                    }
                }
                const content: Feature<Polygon> = {
                    "type": "Feature",
                    "properties": {},
                    "geometry": {
                        "coordinates": [
                            [
                                [
                                    2.8900597545854225,
                                    50.9035099487991
                                ],
                                [
                                    3.4872999807053873,
                                    50.74856284865993
                                ],
                                [
                                    3.9512276563531543,
                                    50.947206170675486
                                ],
                                [
                                    3.897902636163167,
                                    51.25526892606362
                                ],
                                [
                                    3.188679867646016,
                                    51.24525576870511
                                ], [
                                2.8900597545854225,
                                50.9035099487991
                            ]
                            ]
                        ],
                        "type": "Polygon"
                    }
                }
                const clipped = GeoOperations.clipWith(content, bbox)
                expect(clipped.length).to.equal(1)

                const clippedReverse = GeoOperations.clipWith(bbox, content)
                expect(clippedReverse.length).to.equal(1)
            }
        )
    })
})