Lucas Berger
ee2281fe81
- Replace dtend ?? dtstart with event.endDate which handles DURATION-only VEVENTs - Add positive-duration guard (PT30M / P1D) to both non-recurring and recurring branches - Add single-duration.ics fixture and regression test asserting end > start for DURATION-only events
218 lines
8.9 KiB
TypeScript
218 lines
8.9 KiB
TypeScript
/**
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* Tests for expandOccurrences() — GREEN state.
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*
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* Contracts verified here:
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* 1. DST wall-clock correctness: occurrences in America/New_York must show 10:00 local time
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* on BOTH sides of the March 2026 EST→EDT boundary (not shifted ±1h by UTC fallback).
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* 2. All-day events return allDay:true and start as 'YYYY-MM-DD' with no time component.
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* 3. EXDATE exclusions reduce the returned array by exactly one occurrence.
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* 4. Timed event start/end strings are IANA-annotated ('...±HH:MM[IANA/Zone]') so
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* Temporal.ZonedDateTime.from() can parse them without throwing (cross-contract test).
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*/
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import 'temporal-polyfill/global'
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import { describe, it, expect } from 'vitest'
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import { readFileSync } from 'fs'
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import { join, dirname } from 'path'
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import { fileURLToPath } from 'url'
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import { expandOccurrences } from '../../src/broker/expand.js'
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const __dirname = dirname(fileURLToPath(import.meta.url))
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const FIXTURES = join(__dirname, '../fixtures')
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function loadFixture(name: string): string {
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return readFileSync(join(FIXTURES, name), 'utf8')
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}
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describe('expandOccurrences', () => {
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describe('DST correctness — weekly-dst.ics', () => {
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it('returns 10:00 America/New_York wall-clock time on BOTH sides of March 2026 DST boundary', () => {
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// The fixture has DTSTART;TZID=America/New_York:20260301T100000 RRULE:FREQ=WEEKLY.
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// March 8 2026 is the DST transition (clocks spring forward at 02:00).
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// Occurrences on 2026-03-01 (EST, UTC-5) and 2026-03-08 (DST transition day) and
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// 2026-03-15 (EDT, UTC-4) must ALL show hour === 10 in America/New_York.
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// A broken implementation that falls back to UTC would show hour === 10 UTC before
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// transition and hour === 11 local after transition — off by one DST hour.
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const rawVevent = loadFixture('weekly-dst.ics')
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const windowStart = new Date('2026-03-01T00:00:00Z')
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const windowEnd = new Date('2026-04-01T00:00:00Z')
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const occurrences = expandOccurrences(
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rawVevent,
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windowStart,
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windowEnd,
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1, // calendarId
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'My Calendar', // calendarName
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1, // ownerUserId
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'#4A90D9', // color
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false, // isShared
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)
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// Should return several weekly occurrences in March
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expect(occurrences.length).toBeGreaterThan(0)
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// The key contract: every occurrence must have local hour === 10 in America/New_York.
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// We verify this by checking the ISO string — before DST: '...T10:00:00-05:00[America/New_York]'
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// after DST: '...T10:00:00-04:00[America/New_York]'. Both include the IANA bracket.
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for (const occ of occurrences) {
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expect(occ.allDay).toBe(false)
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// start must be IANA-annotated: '2026-03-01T10:00:00-05:00[America/New_York]'
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expect(occ.start).toMatch(/T10:00:00/)
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// Must include IANA bracket — offset-only strings fail Temporal.ZonedDateTime.from()
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expect(occ.start).toContain('[America/New_York]')
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}
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// Explicitly check one pre-transition occurrence (EST) and one post-transition (EDT)
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const preTransition = occurrences.find(o => o.start.includes('2026-03-01'))
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const postTransition = occurrences.find(o => o.start.includes('2026-03-15'))
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expect(preTransition).toBeDefined()
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expect(postTransition).toBeDefined()
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// Pre-transition occurrence: EST — '2026-03-01T10:00:00-05:00[America/New_York]'
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expect(preTransition!.start).toContain('T10:00:00')
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expect(preTransition!.start).toContain('-05:00[America/New_York]')
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// Post-transition occurrence: EDT — '2026-03-15T10:00:00-04:00[America/New_York]'
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expect(postTransition!.start).toContain('T10:00:00')
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expect(postTransition!.start).toContain('-04:00[America/New_York]')
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})
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})
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describe('All-day events — allday-birthday.ics', () => {
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it('returns allDay:true with start as YYYY-MM-DD and no time component', () => {
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// The fixture has DTSTART;VALUE=DATE:20260615 with RRULE:FREQ=YEARLY.
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// The all-day occurrence should have allDay:true and start === '2026-06-15' (DATE format).
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// A broken implementation returning '2026-06-15T00:00:00Z' would fail on date-shift.
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const rawVevent = loadFixture('allday-birthday.ics')
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const windowStart = new Date('2026-06-01T00:00:00Z')
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const windowEnd = new Date('2026-07-01T00:00:00Z')
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const occurrences = expandOccurrences(
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rawVevent,
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windowStart,
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windowEnd,
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1,
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'My Calendar',
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1,
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'#4A90D9',
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false,
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)
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expect(occurrences.length).toBe(1)
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const occ = occurrences[0]
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expect(occ.allDay).toBe(true)
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// start must be plain date string 'YYYY-MM-DD' — no 'T' time component
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expect(occ.start).toBe('2026-06-15')
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expect(occ.start).not.toContain('T')
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})
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})
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describe('EXDATE exclusions — exdate-series.ics', () => {
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it('omits the EXDATE-excluded occurrence (array length is one fewer than un-excluded)', () => {
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// The fixture has RRULE:FREQ=WEEKLY;COUNT=5 with EXDATE for the June 15 occurrence.
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// Without EXDATE: 5 occurrences (Jun 1, Jun 8, Jun 15, Jun 22, Jun 29).
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// With EXDATE on Jun 15: 4 occurrences returned.
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// ICAL.RecurExpansion handles EXDATE internally — no manual filtering needed.
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const rawVevent = loadFixture('exdate-series.ics')
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const windowStart = new Date('2026-06-01T00:00:00Z')
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const windowEnd = new Date('2026-07-01T00:00:00Z')
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const occurrences = expandOccurrences(
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rawVevent,
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windowStart,
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windowEnd,
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1,
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'My Calendar',
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1,
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'#4A90D9',
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false,
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)
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// 5 total occurrences minus 1 EXDATE = 4
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expect(occurrences.length).toBe(4)
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// The June 15 occurrence must be absent
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const june15 = occurrences.find(o => o.start.includes('2026-06-15'))
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expect(june15).toBeUndefined()
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})
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})
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describe('Non-recurring DURATION-only event — single-duration.ics', () => {
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it('BUG-1 regression: non-recurring event with DURATION but no DTEND has end strictly after start', () => {
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// Real Fastmail events use DURATION (not DTEND). Before the fix, the NON-RECURRING branch
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// used getFirstPropertyValue('dtend') ?? dtstart, which returned dtstart when DTEND was absent,
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// producing zero-duration occurrences (invisible in week/day views).
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const rawVevent = loadFixture('single-duration.ics')
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const windowStart = new Date('2026-06-01T00:00:00Z')
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const windowEnd = new Date('2026-07-01T00:00:00Z')
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const occurrences = expandOccurrences(
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rawVevent,
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windowStart,
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windowEnd,
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1,
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'My Calendar',
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1,
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'#4A90D9',
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false,
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)
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expect(occurrences.length).toBe(1)
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const occ = occurrences[0]
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expect(occ.allDay).toBe(false)
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// Parse both via Temporal.ZonedDateTime and assert end > start
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const startZdt = Temporal.ZonedDateTime.from(occ.start)
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const endZdt = Temporal.ZonedDateTime.from(occ.end)
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expect(Temporal.ZonedDateTime.compare(endZdt, startZdt)).toBeGreaterThan(0)
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// Verify the actual duration is correct: DURATION:PT1H → end is 1 hour after start
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expect(endZdt.hour - startZdt.hour).toBe(1)
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expect(endZdt.minute).toBe(startZdt.minute)
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})
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})
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describe('Cross-contract: expand output → Temporal.ZonedDateTime.from (regression guard)', () => {
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it('timed event start/end strings from weekly-dst.ics parse via Temporal.ZonedDateTime.from without throwing', () => {
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// This is the integration test that was missing. It takes the actual serializeTime output
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// (from expandOccurrences) and feeds each start/end through Temporal.ZonedDateTime.from()
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// to prove the expand→hydrate contract holds end-to-end.
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//
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// Previously, serializeTime emitted offset-only strings like '2026-03-01T10:00:00-05:00'
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// which caused Temporal.ZonedDateTime.from() to throw RangeError: Cannot parse.
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// Now it emits IANA-annotated strings like '2026-03-01T10:00:00-05:00[America/New_York]'.
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const rawVevent = loadFixture('weekly-dst.ics')
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const windowStart = new Date('2026-03-01T00:00:00Z')
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const windowEnd = new Date('2026-04-01T00:00:00Z')
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const occurrences = expandOccurrences(
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rawVevent,
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windowStart,
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windowEnd,
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1,
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'My Calendar',
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1,
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'#4A90D9',
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false,
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)
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expect(occurrences.length).toBeGreaterThan(0)
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for (const occ of occurrences) {
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// These must not throw — this is the cross-service contract
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expect(() => Temporal.ZonedDateTime.from(occ.start)).not.toThrow()
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expect(() => Temporal.ZonedDateTime.from(occ.end)).not.toThrow()
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// Parsed ZonedDateTime must round-trip the wall-clock hour
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const startZdt = Temporal.ZonedDateTime.from(occ.start)
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expect(startZdt.hour).toBe(10)
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expect(startZdt.timeZoneId).toBe('America/New_York')
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}
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})
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})
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})
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