fuzzyworld

when-am-i / files / src / utils / urlState.test.ts

urlState.test.ts

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34c4dd59 2026-06-18 Pavel Safronov1import { describe, it, expect } from 'vitest';
631012ab 2026-06-21 Pavel Safronov2import { parseInitialState, toSearch } from './urlState';
34c4dd59 2026-06-18 Pavel Safronov3
4describe('parseInitialState', () => {
5 it('parses a full location + date', () => {
6 expect(parseInitialState('?lat=42.36&lng=-71.06&year=1700&month=4&day=1')).toEqual({
7 picked: { lat: 42.36, lng: -71.06 },
8 date: { year: 1700, month: 4, day: 1 },
9 });
10 });
11
12 it('maps era=BCE to astronomical numbering', () => {
13 expect(parseInitialState('?year=44&month=3&day=15&era=BCE').date).toEqual({ year: -43, month: 3, day: 15 });
14 });
15
16 it('parses an optional zoom', () => {
17 expect(parseInitialState('?lat=1&lng=2&zoom=11').zoom).toBe(11);
18 expect(parseInitialState('?lat=1&lng=2').zoom).toBeUndefined();
19 });
20
21 it('ignores a partial location', () => {
22 expect(parseInitialState('?lat=42.36').picked).toBeUndefined();
23 });
24
25 it('ignores malformed numbers', () => {
26 expect(parseInitialState('?lat=abc&lng=2')).toEqual({});
27 });
28
29 it('returns empty for no params', () => {
30 expect(parseInitialState('')).toEqual({});
31 });
32});
631012ab 2026-06-21 Pavel Safronov33
34describe('toSearch', () => {
35 it('serializes pin, zoom, and date into the same params parseInitialState reads', () => {
36 const search = toSearch({ lat: 42.36, lng: -71.06 }, { year: 1700, month: 4, day: 1, era: 'CE' }, 6);
37 const parsed = parseInitialState(search);
38 expect(parsed.picked).toEqual({ lat: 42.36, lng: -71.06 });
39 expect(parsed.zoom).toBe(6);
40 expect(parsed.date).toEqual({ year: 1700, month: 4, day: 1 });
41 });
42
43 it('round-trips a BCE date', () => {
44 const search = toSearch(null, { year: 44, month: 3, day: 15, era: 'BCE' }, 2);
45 expect(search).toContain('era=BCE');
46 expect(parseInitialState(search).date).toEqual({ year: -43, month: 3, day: 15 });
47 });
48
49 it('omits the pin when nothing is picked but still records the date', () => {
50 const search = toSearch(null, { year: 2000, month: 1, day: 1, era: 'CE' }, 3);
51 expect(search).not.toContain('lat=');
52 expect(parseInitialState(search).date).toEqual({ year: 2000, month: 1, day: 1 });
53 });
54});