@seasketch/geoprocessing/dist/src/toolbox/area.test.js

Geoprocessing and reporting framework for SeaSketch 2.0

import { describe, test, expect } from "vitest";
import { firstMatchingMetric } from "../metrics/index.js";
import { area } from "./area.js";
import fix from "../testing/fixtures/squareSketches.js";
describe("area", () => {
    test("function is present", () => {
        expect(typeof area).toBe("function");
    });
    test("area - sketch polygon", async () => {
        const metrics = await area(fix.insideTwoByPolySketch);
        expect(metrics.length).toBe(1);
        expect(metrics[0].value).toBeCloseTo(12_363_718_145.180_046);
    });
    test("area - sketch polygon set metric id", async () => {
        const metrics = await area(fix.insideTwoByPolySketch, {
            metricId: "specialArea",
        });
        expect(metrics.length).toBe(1);
        expect(metrics[0].metricId).toBe("specialArea");
    });
    test("area - collection, should have metric for area, but not areaPerc", async () => {
        const metrics = await area(fix.overlapCollection);
        const collMetrics = metrics.filter((m) => m.sketchId === "CCCC");
        expect(collMetrics.length).toBe(1);
        expect(collMetrics[0].metricId).toBe("area");
    });
    test("area - collection, should have child metrics, area and percArea", async () => {
        const metrics = await area(fix.overlapCollection, {
            includePercMetric: true,
        });
        const childMetrics = metrics.filter((m) => m.sketchId !== "CCCC" && m.metricId === "area");
        expect(childMetrics.length).toBe(fix.sketchCollection.features.length);
        const childPercMetrics = metrics.filter((m) => m.sketchId !== "CCCC" && m.metricId === "areaPerc");
        expect(childPercMetrics.length).toBe(fix.sketchCollection.features.length);
        expect(childPercMetrics[1].value).toEqual(childPercMetrics[2].value);
    });
    test("area - collection area should be less than sum of children due to second sketch cancelling third", async () => {
        const metrics = await area(fix.overlapCollection, {
            includePercMetric: true,
        });
        const childMetrics = metrics.filter((m) => m.sketchId !== "CCCC" && m.metricId === "area");
        const collMetric = firstMatchingMetric(metrics, (m) => m.sketchId === "CCCC");
        const childAreaSum = childMetrics.reduce((sumSoFar, m) => m.value + sumSoFar, 0);
        expect(collMetric.value).toBeLessThan(childAreaSum);
        expect(collMetric.value).toEqual(childMetrics[0].value + childMetrics[1].value);
    });
});
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