45 lines
1.6 KiB
TypeScript
45 lines
1.6 KiB
TypeScript
import { describe, expect, it } from "@suaveplan/testing/runner";
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import { distanceKm, distanceMetresRaw, distanceNm } from "./distance.js";
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const SINGAPORE = { latitude: 1.2644, longitude: 103.8198 };
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const ROTTERDAM = { latitude: 51.9, longitude: 4.49 };
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describe("distance helpers", () => {
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it("distanceNm zero between identical coords", { timeout: 5000 }, () => {
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expect(distanceNm(SINGAPORE, SINGAPORE)).toBe(0);
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});
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it("distanceKm zero between identical coords", { timeout: 5000 }, () => {
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expect(distanceKm(SINGAPORE, SINGAPORE)).toBe(0);
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});
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it("distanceMetresRaw produces unrounded metres", { timeout: 5000 }, () => {
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const raw = distanceMetresRaw(SINGAPORE, ROTTERDAM);
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expect(raw).toBeGreaterThan(10_000_000);
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expect(raw).toBeLessThan(12_000_000);
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});
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it("Singapore to Rotterdam great-circle is ~5800 nm", {
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timeout: 5000,
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}, () => {
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const nm = distanceNm(SINGAPORE, ROTTERDAM);
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expect(nm).toBeGreaterThan(5600);
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expect(nm).toBeLessThan(6000);
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});
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it("Singapore to Rotterdam great-circle is ~10800 km", {
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timeout: 5000,
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}, () => {
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const km = distanceKm(SINGAPORE, ROTTERDAM);
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expect(km).toBeGreaterThan(10500);
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expect(km).toBeLessThan(11200);
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});
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it("nm * 1.852 ≈ km within 1% tolerance", { timeout: 5000 }, () => {
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const nm = distanceNm(SINGAPORE, ROTTERDAM);
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const km = distanceKm(SINGAPORE, ROTTERDAM);
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const expected = nm * 1.852;
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expect(Math.abs(km - expected) / km).toBeLessThan(0.01);
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});
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});
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