settings.test.ts

Blame: the commit that last changed each line · file · history

`a8fd3f13` 2026-10-10 Pavel Safronov	1	import { describe, expect, it } from 'vitest'
	2	import { TIME_NAMES } from '../src/render/sky.js'
`236f7d03` 2026-10-10 Pavel Safronov	3	import { WEATHER, WEATHERS, anyLake, loadSettings, timeOf, weatherOf, windOf } from '../src/settings.js'
`a8fd3f13` 2026-10-10 Pavel Safronov	4
	5	describe('settings', () => {
`8876a48d` 2026-10-10 Pavel Safronov	6	it('starts with a surprise for the time of day, no impossible ice, and steering by touch', () => {
`a8fd3f13` 2026-10-10 Pavel Safronov	7	// There is no storage here, which is also what a private window is like.
`1ee103b4` 2026-10-11 Pavel Safronov	8	expect(loadSettings()).toEqual({ time: 'surprise', weather: 'surprise', pace: 'cruise', impossibleIce: false, tilt: false })
`a8fd3f13` 2026-10-10 Pavel Safronov	9	})
	10
	11	it('picks a lake from a million', () => {
	12	for (let i = 0; i < 1000; i++) {
	13	const lake = anyLake()
	14	expect(Number.isInteger(lake)).toBe(true)
	15	expect(lake).toBeGreaterThanOrEqual(1)
	16	expect(lake).toBeLessThanOrEqual(999_999)
	17	}
	18	})
	19
	20	it('gives each lake a time of day of its own: every time somewhere, day the likeliest', () => {
	21	const count = Object.fromEntries(TIME_NAMES.map((name) => [name, 0]))
	22	for (let lake = 1; lake <= 20_000; lake++) {
	23	expect(timeOf(lake)).toBe(timeOf(lake))
	24	count[timeOf(lake)]!++
	25	}
	26	for (const name of TIME_NAMES) expect(count[name]! / 20_000).toBeGreaterThan(0.12)
	27	expect(count.day).toBe(Math.max(...Object.values(count)))
	28	expect(count.aurora).toBe(Math.min(...Object.values(count)))
	29	})
`236f7d03` 2026-10-10 Pavel Safronov	30
	31	it('gives each lake a weather of its own: mostly clear, sometimes snow, now and then a blizzard', () => {
	32	const count = Object.fromEntries(WEATHERS.map((name) => [name, 0]))
	33	for (let lake = 1; lake <= 20_000; lake++) {
	34	expect(weatherOf(lake)).toBe(weatherOf(lake))
	35	count[weatherOf(lake)]!++
	36	expect(windOf(lake)).toBeGreaterThanOrEqual(0)
	37	expect(windOf(lake)).toBeLessThan(2 * Math.PI)
	38	}
	39	expect(count.clear! / 20_000).toBeGreaterThan(0.55)
	40	expect(count.snow! / 20_000).toBeGreaterThan(0.2)
	41	expect(count.blizzard! / 20_000).toBeGreaterThan(0.06)
	42	expect(count.blizzard).toBeLessThan(count.snow!)
	43	})
	44
	45	it('has weather that gets worse in every way together', () => {
	46	const [clear, falling, blizzard] = WEATHERS.map((name) => WEATHER[name])
	47	expect(clear!.snow).toBe(0)
	48	expect(clear!.wind[1]).toBe(0)
	49	for (const [milder, worse] of [[clear!, falling!], [falling!, blizzard!]] as const) {
	50	expect(worse.snow).toBeGreaterThan(milder.snow)
	51	expect(worse.sight).toBeLessThan(milder.sight)
	52	expect(worse.overcast).toBeGreaterThan(milder.overcast)
	53	expect(worse.wind[1]).toBeGreaterThan(milder.wind[1])
	54	}
	55	})
`a8fd3f13` 2026-10-10 Pavel Safronov	56	})