grenadeandClaude Opus 5.5
21ec54bd24
ci / gate (push) Failing after 4m31s
Instants (blocks, swaps, node starts) render in the viewer's zone and say which: tables carry the zone, charts name it once, titles give UTC. Daily buckets the API cut at UTC midnight render in UTC and are headed "(UTC)" — FlowChart formatted them as local dates, putting every bar a day early anywhere west of Greenwich. All date formatting goes through lib/format.ts (when, utc, clock, utcDay, utcMonth, zone), one locale and a 24-hour clock. `pnpm test` runs Node's built-in runner under America/New_York, where the old formatter turns 5 Oct into 4 Oct, and is part of the shared CI gate. Closes #38 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_015pkwBsR54NRmZyU4QVhvfj
33 lines
1.3 KiB
TypeScript
33 lines
1.3 KiB
TypeScript
// Run under a zone west of Greenwich (`TZ=America/New_York`, see `pnpm test`),
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// which is where a UTC day formatted as local time lands on the day before.
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import assert from 'node:assert/strict'
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import { test } from 'node:test'
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import { clock, utc, utcDay, utcMonth, when, zone } from '../src/lib/format.ts'
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test('the test runs west of UTC, or it proves nothing', () => {
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assert.ok(new Date('2026-10-05T00:00:00Z').getTimezoneOffset() > 0)
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})
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test('a UTC-midnight bucket formats as its own date', () => {
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assert.equal(utcDay('2026-10-05T00:00:00Z'), '5 Oct')
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assert.equal(utcDay('2026-10-05T00:00:00Z', true), '5 Oct 2026')
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assert.equal(utcMonth('2026-10-01T00:00:00Z'), 'Oct 2026')
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})
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test('an instant is local, 24-hour, and names its zone', () => {
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assert.equal(when('2026-10-05T17:00:00Z'), '05 Oct 2026, 13:00 GMT-4')
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assert.equal(zone(Date.parse('2026-10-05T17:00:00Z')), 'GMT-4')
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assert.equal(when(null), '—')
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})
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test('a title carries the instant in UTC', () => {
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assert.equal(utc('2026-10-05T17:00:00.123Z'), '2026-10-05 17:00:00 UTC')
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})
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test('chart labels are local clock time, dated past a day', () => {
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const ms = Date.parse('2026-10-05T17:00:00Z')
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assert.equal(clock(ms, 3_600_000), '13:00')
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assert.equal(clock(ms, 2 * 86_400_000), '5 Oct, 13:00')
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})
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