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https://github.com/tiennm99/vngeoguessr.git
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tiennm99
b15d199565
Region size no longer stretches the score thresholds. A guess is graded on absolute precision, so a point means the same thing on the district, province and country board, and the headline score matches what every level is credited. Drops the per-round bands payload and its client plumbing: with one ladder the result dialog reads the constant directly.
77 lines
2.2 KiB
JavaScript
77 lines
2.2 KiB
JavaScript
import { describe, it, expect } from 'vitest';
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import {
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SCORE_BANDS,
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calculateDistance,
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calculateScore,
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formatDistance,
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} from '../src/lib/game.js';
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describe('calculateScore', () => {
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// The bands are the whole scoring rule, so each boundary is pinned on both
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// sides: an off-by-one here silently rewrites what players are rewarded for.
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it.each([
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[0, 5],
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[50, 5],
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[51, 4],
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[100, 4],
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[101, 3],
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[200, 3],
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[201, 2],
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[500, 2],
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[501, 1],
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[1000, 1],
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[1001, 0],
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[50000, 0],
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])('scores %dm as %d', (distance, expected) => {
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expect(calculateScore(distance)).toBe(expected);
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});
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it('is the same ladder for every region', () => {
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expect(SCORE_BANDS.map((band) => band.maxMeters)).toEqual([50, 100, 200, 500, 1000]);
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expect(SCORE_BANDS.map((band) => band.points)).toEqual([5, 4, 3, 2, 1]);
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});
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});
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describe('calculateDistance', () => {
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it('returns zero for identical coordinates', () => {
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expect(calculateDistance(10.8231, 106.6297, 10.8231, 106.6297)).toBe(0);
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});
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it('measures one degree of latitude as roughly 111km', () => {
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const metres = calculateDistance(10, 106, 11, 106);
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// Turf uses a spherical earth, so the exact figure depends on its radius
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// constant. Assert the magnitude, not the constant.
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expect(metres).toBeGreaterThan(110_000);
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expect(metres).toBeLessThan(112_000);
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});
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it('is symmetric', () => {
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const there = calculateDistance(10.8231, 106.6297, 21.0285, 105.8542);
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const back = calculateDistance(21.0285, 105.8542, 10.8231, 106.6297);
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expect(there).toBe(back);
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});
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it('returns whole metres', () => {
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const metres = calculateDistance(10.8231, 106.6297, 10.8241, 106.6307);
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expect(Number.isInteger(metres)).toBe(true);
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});
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it('grows with separation', () => {
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const near = calculateDistance(10.82, 106.62, 10.83, 106.62);
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const far = calculateDistance(10.82, 106.62, 10.9, 106.62);
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expect(far).toBeGreaterThan(near);
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});
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});
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describe('formatDistance', () => {
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it.each([
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[0, '0m'],
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[999, '999m'],
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[1000, '1.00km'],
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[1500, '1.50km'],
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[12300, '12.30km'],
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])('formats %dm as %s', (distance, expected) => {
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expect(formatDistance(distance)).toBe(expected);
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});
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});
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