element-web/test/unit-tests/utils/beacon/bounds-test.ts

/*
Copyright 2024 New Vector Ltd.
Copyright 2022 The Matrix.org Foundation C.I.C

SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
Please see LICENSE files in the repository root for full details.
*/

import { Beacon } from "matrix-js-sdk/src/matrix";

import { Bounds, getBeaconBounds } from "../../../../src/utils/beacon/bounds";
import { makeBeaconEvent, makeBeaconInfoEvent } from "../../../test-utils";

describe("getBeaconBounds()", () => {
    const userId = "@user:server";
    const roomId = "!room:server";
    const makeBeaconWithLocation = (latLon: { lat: number; lon: number }) => {
        const geoUri = `geo:${latLon.lat},${latLon.lon}`;
        const beacon = new Beacon(makeBeaconInfoEvent(userId, roomId, { isLive: true }));
        // @ts-ignore private prop, sets internal live property so addLocations works
        beacon.checkLiveness();
        const location = makeBeaconEvent(userId, {
            beaconInfoId: beacon.beaconInfoId,
            geoUri,
            timestamp: Date.now() + 1,
        });
        beacon.addLocations([location]);

        return beacon;
    };

    const geo = {
        // northern hemi
        // west of greenwich
        london: { lat: 51.5, lon: -0.14 },
        reykjavik: { lat: 64.08, lon: -21.82 },
        // east of greenwich
        paris: { lat: 48.85, lon: 2.29 },
        // southern hemi
        // east
        auckland: { lat: -36.85, lon: 174.76 }, // nz
        // west
        lima: { lat: -12.013843, lon: -77.008388 }, // peru
    };

    const london = makeBeaconWithLocation(geo.london);
    const reykjavik = makeBeaconWithLocation(geo.reykjavik);
    const paris = makeBeaconWithLocation(geo.paris);
    const auckland = makeBeaconWithLocation(geo.auckland);
    const lima = makeBeaconWithLocation(geo.lima);

    it("should return undefined when there are no beacons", () => {
        expect(getBeaconBounds([])).toBeUndefined();
    });

    it("should return undefined when no beacons have locations", () => {
        const beacon = new Beacon(makeBeaconInfoEvent(userId, roomId));
        expect(getBeaconBounds([beacon])).toBeUndefined();
    });

    type TestCase = [string, Beacon[], Bounds];
    it.each<TestCase>([
        [
            "one beacon",
            [london],
            { north: geo.london.lat, south: geo.london.lat, east: geo.london.lon, west: geo.london.lon },
        ],
        [
            "beacons in the northern hemisphere, west of meridian",
            [london, reykjavik],
            { north: geo.reykjavik.lat, south: geo.london.lat, east: geo.london.lon, west: geo.reykjavik.lon },
        ],
        [
            "beacons in the northern hemisphere, both sides of meridian",
            [london, reykjavik, paris],
            // reykjavik northmost and westmost, paris southmost and eastmost
            { north: geo.reykjavik.lat, south: geo.paris.lat, east: geo.paris.lon, west: geo.reykjavik.lon },
        ],
        [
            "beacons in the southern hemisphere",
            [auckland, lima],
            // lima northmost and westmost, auckland southmost and eastmost
            { north: geo.lima.lat, south: geo.auckland.lat, east: geo.auckland.lon, west: geo.lima.lon },
        ],
        [
            "beacons in both hemispheres",
            [auckland, lima, paris],
            { north: geo.paris.lat, south: geo.auckland.lat, east: geo.auckland.lon, west: geo.lima.lon },
        ],
    ])("gets correct bounds for %s", (_description, beacons, expectedBounds) => {
        expect(getBeaconBounds(beacons)).toEqual(expectedBounds);
    });
});