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History/server/map.test.ts
2026-10-11 19:22:33 +00:00

119 lines
4.1 KiB
TypeScript

import { describe, expect, it } from 'vitest';
import { buildRegionMap } from './map';
import { nationColor, regionOwner, type RegionMap } from '../shared/protocol';
import type { GameState } from '../shared/types';
const state: GameState = {
id: 'g',
presetId: 'p',
presetTitle: 'P',
playerNationId: 'uk',
turn: 1,
date: '1939-09-01',
nations: {
uk: {
id: 'uk',
name: 'UK',
type: 'major',
stats: { military: 80, economy: 70, stability: 60, population: 50 },
territory: ['GBR', 'IRL'],
relations: {},
},
de: {
id: 'de',
name: 'DE',
type: 'major',
stats: { military: 90, economy: 70, stability: 70, population: 90 },
territory: ['DEU'],
relations: {},
},
},
events: [],
pending: [],
version: 1,
};
// The RegionMap built from the fixture: the authoritative ISO_A3 → owner source.
const regions: RegionMap = buildRegionMap(state);
describe('buildRegionMap', () => {
it('maps each ISO_A3 region to its owner + that nation\'s stable color', () => {
const m = buildRegionMap(state);
expect(m.GBR).toEqual({ color: nationColor('uk'), owner: 'UK', ownerId: 'uk' });
expect(m.IRL).toEqual({ color: nationColor('uk'), owner: 'UK', ownerId: 'uk' });
expect(m.DEU).toEqual({ color: nationColor('de'), owner: 'DE', ownerId: 'de' });
// a region nobody owns is simply absent
expect(m.FRA).toBeUndefined();
});
});
describe('regionOwner', () => {
it('resolves an owned region\'s ISO_A3 to its owner record', () => {
expect(regionOwner(regions, 'GBR')).toEqual({
color: nationColor('uk'),
owner: 'UK',
ownerId: 'uk',
});
expect(regionOwner(regions, 'DEU')).toEqual({
color: nationColor('de'),
owner: 'DE',
ownerId: 'de',
});
});
it('returns undefined for an unowned region (no RegionMap entry)', () => {
expect(regionOwner(regions, 'FRA')).toBeUndefined();
expect(regionOwner(regions, 'USA')).toBeUndefined();
});
it('returns undefined for an empty or missing code', () => {
expect(regionOwner(regions, '')).toBeUndefined();
expect(regionOwner(regions, null)).toBeUndefined();
expect(regionOwner(regions, undefined)).toBeUndefined();
});
});
/**
* #6 regression guard. The click/hover handlers resolve the owning nation from a
* map feature. MapLibre repacks a GeoJSON source's top-level `id` (the ISO_A3
* string) into a *numeric index* when it stores the source, so a feature the map
* hands back at interaction time has a number for `id` and the ISO_A3 only lives
* in `properties.regionId`. This test pins the exact data shape and proves the
* fix: resolution via `properties.regionId` works, while the pre-fix path that
* read `feature.id` does not.
*/
describe('#6 — owner must be resolved from properties.regionId, not the repacked feature.id', () => {
// The shape MapLibre returns for a source feature after setData(): `id` is a
// number (here 0, as observed in the live map), and the ISO_A3 is preserved
// only in properties (the client stamps it as `regionId`).
const repackedFeature = {
id: 0,
properties: { name: 'DE', regionId: 'DEU' },
};
it('resolves the owner from properties.regionId (the fix)', () => {
const code = typeof repackedFeature.properties.regionId === 'string' ? repackedFeature.properties.regionId : '';
expect(regionOwner(regions, code)).toEqual({
color: nationColor('de'),
owner: 'DE',
ownerId: 'de',
});
});
it('the old path (feature.id as a string key) does NOT resolve — the bug', () => {
// String(0) === '0' is not a valid ISO_A3 key, so the pre-fix lookup failed
// and the click popup reported "No owner" even for owned regions.
expect(regions[String(repackedFeature.id)]).toBeUndefined();
expect(regionOwner(regions, String(repackedFeature.id))).toBeUndefined();
});
});
describe('nationColor', () => {
it('is deterministic per id and distinct across different ids', () => {
expect(nationColor('uk')).toBe(nationColor('uk'));
expect(nationColor('uk')).not.toBe(nationColor('de'));
// always a valid HSL string
expect(nationColor('uk')).toMatch(/^hsl\(\d+ 58% 46%\)$/);
});
});