379 lines
14 KiB
TypeScript
379 lines
14 KiB
TypeScript
import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
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import { readFile, rm } from 'fs/promises'
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import { existsSync } from 'fs'
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import { tmpdir } from 'os'
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import { join } from 'path'
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import type { ProjectSummary } from '../src/types.js'
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import {
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addNewDays,
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DAILY_CACHE_VERSION,
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type DailyCache,
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type DailyEntry,
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getDaysInRange,
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ensureCacheHydrated,
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loadDailyCache,
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saveDailyCache,
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withDailyCacheLock,
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} from '../src/daily-cache.js'
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function emptyDay(date: string, cost = 0, calls = 0): DailyEntry {
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return {
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date,
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cost,
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savingsUSD: 0,
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calls,
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sessions: 0,
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inputTokens: 0,
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outputTokens: 0,
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cacheReadTokens: 0,
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cacheWriteTokens: 0,
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editTurns: 0,
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oneShotTurns: 0,
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models: {},
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categories: {},
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providers: {},
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}
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}
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const TMP_CACHE_ROOT = join(tmpdir(), `codeburn-cache-test-${Date.now()}-${Math.random().toString(36).slice(2, 8)}`)
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beforeEach(() => {
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process.env['CODEBURN_CACHE_DIR'] = TMP_CACHE_ROOT
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})
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afterEach(async () => {
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vi.useRealTimers()
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if (existsSync(TMP_CACHE_ROOT)) {
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await rm(TMP_CACHE_ROOT, { recursive: true, force: true })
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}
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})
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describe('loadDailyCache', () => {
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it('returns an empty cache when the file does not exist', async () => {
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const cache = await loadDailyCache()
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expect(cache.version).toBe(DAILY_CACHE_VERSION)
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expect(cache.lastComputedDate).toBeNull()
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expect(cache.days).toEqual([])
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})
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it('returns an empty cache when the file contains invalid JSON', async () => {
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const { writeFile, mkdir } = await import('fs/promises')
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await mkdir(TMP_CACHE_ROOT, { recursive: true })
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await writeFile(join(TMP_CACHE_ROOT, 'daily-cache.json'), 'not valid json{{', 'utf-8')
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const cache = await loadDailyCache()
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expect(cache.days).toEqual([])
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})
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it('returns an empty cache and backs up when version is too old to migrate', async () => {
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const saved = {
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version: 1,
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lastComputedDate: '2026-04-10',
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days: [{ date: '2026-04-10', cost: 10, calls: 5 }],
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}
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const { writeFile, mkdir } = await import('fs/promises')
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await mkdir(TMP_CACHE_ROOT, { recursive: true })
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await writeFile(join(TMP_CACHE_ROOT, 'daily-cache.json'), JSON.stringify(saved), 'utf-8')
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const cache = await loadDailyCache()
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expect(cache.days).toEqual([])
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expect(cache.lastComputedDate).toBeNull()
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expect(existsSync(join(TMP_CACHE_ROOT, 'daily-cache.json.v1.bak'))).toBe(true)
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})
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it('discards a v2 cache and starts fresh (provider rollups would be stale)', async () => {
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// MIN_SUPPORTED_VERSION was raised to DAILY_CACHE_VERSION because the
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// migration path cannot recompute the providers / categories / models
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// rollups from session data (the cache does not retain raw sessions),
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// so a migrated old cache would carry forward stale provider totals
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// for the full retention window. Older caches now get discarded and
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// recomputed from scratch on next run.
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const saved = {
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version: 2,
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lastComputedDate: '2026-04-10',
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days: [{
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date: '2026-04-10', cost: 10, calls: 5, sessions: 2,
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inputTokens: 1000, outputTokens: 500, cacheReadTokens: 200, cacheWriteTokens: 100,
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models: { 'claude-opus-4-6': { calls: 5, cost: 10, inputTokens: 1000, outputTokens: 500, cacheReadTokens: 200, cacheWriteTokens: 100 } },
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}],
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}
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const { writeFile, mkdir } = await import('fs/promises')
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await mkdir(TMP_CACHE_ROOT, { recursive: true })
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await writeFile(join(TMP_CACHE_ROOT, 'daily-cache.json'), JSON.stringify(saved), 'utf-8')
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const cache = await loadDailyCache()
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expect(cache.version).toBe(DAILY_CACHE_VERSION)
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expect(cache.days).toEqual([])
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expect(cache.lastComputedDate).toBeNull()
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// Old cache is renamed to .v2.bak rather than deleted.
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expect(existsSync(join(TMP_CACHE_ROOT, 'daily-cache.json.v2.bak'))).toBe(true)
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})
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it('discards a v5 cache because cached Claude costs predate 1-hour cache pricing', async () => {
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const saved = {
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version: 5,
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lastComputedDate: '2026-05-01',
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days: [{
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date: '2026-05-01',
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cost: 0.37575,
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calls: 1,
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sessions: 1,
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inputTokens: 0,
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outputTokens: 0,
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cacheReadTokens: 0,
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cacheWriteTokens: 60_120,
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editTurns: 0,
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oneShotTurns: 0,
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models: { 'Opus 4.7': { calls: 1, cost: 0.37575, inputTokens: 0, outputTokens: 0, cacheReadTokens: 0, cacheWriteTokens: 60_120 } },
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categories: {},
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providers: { claude: { calls: 1, cost: 0.37575 } },
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}],
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}
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const { writeFile, mkdir } = await import('fs/promises')
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await mkdir(TMP_CACHE_ROOT, { recursive: true })
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await writeFile(join(TMP_CACHE_ROOT, 'daily-cache.json'), JSON.stringify(saved), 'utf-8')
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const cache = await loadDailyCache()
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expect(cache.version).toBe(DAILY_CACHE_VERSION)
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expect(cache.days).toEqual([])
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expect(cache.lastComputedDate).toBeNull()
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expect(existsSync(join(TMP_CACHE_ROOT, 'daily-cache.json.v5.bak'))).toBe(true)
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})
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it('round-trips a valid cache through save and load', async () => {
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const saved: DailyCache = {
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version: DAILY_CACHE_VERSION,
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savingsConfigHash: 'cfg-hash-1',
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lastComputedDate: '2026-04-10',
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days: [emptyDay('2026-04-09', 12.5, 40), emptyDay('2026-04-10', 7.25, 28)],
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}
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await saveDailyCache(saved)
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const loaded = await loadDailyCache()
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expect(loaded).toEqual(saved)
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})
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})
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describe('saveDailyCache', () => {
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it('writes atomically so no temp file is left after a successful save', async () => {
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const saved: DailyCache = {
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version: DAILY_CACHE_VERSION,
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savingsConfigHash: 'cfg-hash-1',
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lastComputedDate: '2026-04-10',
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days: [emptyDay('2026-04-10', 5)],
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}
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await saveDailyCache(saved)
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const { readdir } = await import('fs/promises')
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const files = await readdir(TMP_CACHE_ROOT)
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const tempLeftovers = files.filter(f => f.endsWith('.tmp'))
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expect(tempLeftovers).toEqual([])
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const finalFile = await readFile(join(TMP_CACHE_ROOT, 'daily-cache.json'), 'utf-8')
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expect(JSON.parse(finalFile)).toEqual(saved)
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})
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})
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describe('addNewDays', () => {
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it('returns a new cache with the added days sorted ascending by date', () => {
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const base: DailyCache = {
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version: DAILY_CACHE_VERSION,
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savingsConfigHash: '',
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lastComputedDate: '2026-04-08',
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days: [emptyDay('2026-04-07', 3), emptyDay('2026-04-08', 5)],
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}
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const updated = addNewDays(base, [emptyDay('2026-04-10', 9), emptyDay('2026-04-09', 7)], '2026-04-10')
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expect(updated.days.map(d => d.date)).toEqual(['2026-04-07', '2026-04-08', '2026-04-09', '2026-04-10'])
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expect(updated.lastComputedDate).toBe('2026-04-10')
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})
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it('replaces existing days with incoming data (last write wins)', () => {
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const base: DailyCache = {
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version: DAILY_CACHE_VERSION,
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savingsConfigHash: '',
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lastComputedDate: '2026-04-08',
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days: [emptyDay('2026-04-08', 5)],
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}
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const updated = addNewDays(base, [emptyDay('2026-04-08', 99)], '2026-04-08')
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const aprilEight = updated.days.find(d => d.date === '2026-04-08')!
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expect(aprilEight.cost).toBe(99)
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})
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it('does not regress lastComputedDate if incoming newestDate is older', () => {
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const base: DailyCache = {
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version: DAILY_CACHE_VERSION,
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savingsConfigHash: '',
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lastComputedDate: '2026-04-10',
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days: [emptyDay('2026-04-10', 5)],
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}
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const updated = addNewDays(base, [emptyDay('2026-04-05', 3)], '2026-04-05')
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expect(updated.lastComputedDate).toBe('2026-04-10')
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})
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it('skips prune when newestDate is malformed (does not silently drop all days)', () => {
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// Regression guard: a corrupt newestDate string used to produce a NaN
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// cutoff, which made `d.date >= "Invalid Date"` always false and
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// wiped every cached day on the next merge. The guard now leaves
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// the entries untouched so the next valid run can prune normally.
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const base: DailyCache = {
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version: DAILY_CACHE_VERSION,
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savingsConfigHash: '',
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lastComputedDate: '2026-04-10',
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days: [emptyDay('2026-04-08', 1), emptyDay('2026-04-09', 2), emptyDay('2026-04-10', 3)],
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}
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const updated = addNewDays(base, [], 'not-a-date')
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expect(updated.days.map(d => d.date)).toEqual(['2026-04-08', '2026-04-09', '2026-04-10'])
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})
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it('still prunes when newestDate is valid', () => {
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const old = '2020-01-01'
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const recent = '2026-04-10'
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const base: DailyCache = {
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version: DAILY_CACHE_VERSION,
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savingsConfigHash: '',
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lastComputedDate: recent,
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days: [emptyDay(old, 1), emptyDay(recent, 2)],
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}
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const updated = addNewDays(base, [], recent)
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// 730-day retention from 2026-04-10 → cutoff ~2024-04-11; 2020-01-01 must be gone.
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expect(updated.days.find(d => d.date === old)).toBeUndefined()
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expect(updated.days.find(d => d.date === recent)).toBeDefined()
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})
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})
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describe('getDaysInRange', () => {
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const cache: DailyCache = {
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version: DAILY_CACHE_VERSION,
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savingsConfigHash: '',
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lastComputedDate: '2026-04-10',
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days: [
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emptyDay('2026-04-05', 1),
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emptyDay('2026-04-06', 2),
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emptyDay('2026-04-07', 3),
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emptyDay('2026-04-08', 4),
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emptyDay('2026-04-09', 5),
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emptyDay('2026-04-10', 6),
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],
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}
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it('returns inclusive start and end range', () => {
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const days = getDaysInRange(cache, '2026-04-07', '2026-04-09')
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expect(days.map(d => d.date)).toEqual(['2026-04-07', '2026-04-08', '2026-04-09'])
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})
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it('returns empty when range is entirely outside cache', () => {
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expect(getDaysInRange(cache, '2026-03-01', '2026-03-10')).toEqual([])
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expect(getDaysInRange(cache, '2026-05-01', '2026-05-10')).toEqual([])
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})
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it('clips to available cache days when range extends beyond', () => {
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const days = getDaysInRange(cache, '2026-04-09', '2026-04-20')
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expect(days.map(d => d.date)).toEqual(['2026-04-09', '2026-04-10'])
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})
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})
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describe('ensureCacheHydrated', () => {
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it('does not recompute yesterday after it has already been cached', async () => {
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vi.useFakeTimers()
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vi.setSystemTime(new Date('2026-06-12T12:00:00.000Z'))
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const saved: DailyCache = {
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version: DAILY_CACHE_VERSION,
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savingsConfigHash: '',
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lastComputedDate: '2026-06-11',
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days: [emptyDay('2026-06-11', 5, 10)],
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}
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await saveDailyCache(saved)
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let parseCalls = 0
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const hydrated = await ensureCacheHydrated(
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async () => {
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parseCalls += 1
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return []
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},
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() => [],
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)
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expect(parseCalls).toBe(0)
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expect(hydrated).toEqual(saved)
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})
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it('drops a cached today/future entry so it is recomputed live, keeping yesterday cached', async () => {
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vi.useFakeTimers()
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vi.setSystemTime(new Date('2026-06-12T12:00:00.000Z'))
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// A "today" entry can only exist via a backward clock change or a stale
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// cache; it must be purged so today is served live, not from a frozen entry.
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const saved: DailyCache = {
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version: DAILY_CACHE_VERSION,
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savingsConfigHash: '',
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lastComputedDate: '2026-06-12',
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days: [emptyDay('2026-06-11', 5, 10), emptyDay('2026-06-12', 9, 20)],
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}
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await saveDailyCache(saved)
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let parseCalls = 0
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const hydrated = await ensureCacheHydrated(
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async () => {
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parseCalls += 1
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return []
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},
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() => [],
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)
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expect(parseCalls).toBe(0)
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expect(hydrated.days.map(d => d.date)).toEqual(['2026-06-11'])
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expect(hydrated.lastComputedDate).toBe('2026-06-11')
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})
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})
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describe('withDailyCacheLock', () => {
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it('serializes concurrent operations', async () => {
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const sequence: string[] = []
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const op = async (tag: string): Promise<void> => {
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await withDailyCacheLock(async () => {
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sequence.push(`start-${tag}`)
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await new Promise(r => setTimeout(r, 20))
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sequence.push(`end-${tag}`)
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})
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}
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await Promise.all([op('a'), op('b'), op('c')])
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for (let i = 0; i < sequence.length; i += 2) {
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expect(sequence[i]?.startsWith('start-')).toBe(true)
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expect(sequence[i + 1]?.startsWith('end-')).toBe(true)
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expect(sequence[i]!.slice(6)).toBe(sequence[i + 1]!.slice(4))
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}
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})
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})
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describe('ensureCacheHydrated: savings config invalidation', () => {
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it('discards cached days when the savingsConfigHash changes between calls', async () => {
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// Seed a cache with a day OLDER than yesterday so the hydration window
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// (which keeps `d.date < yesterdayStr`) actually retains it.
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const twoDaysAgo = new Date(Date.now() - 2 * 24 * 60 * 60 * 1000)
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const twoDaysAgoStr = `${twoDaysAgo.getFullYear()}-${String(twoDaysAgo.getMonth() + 1).padStart(2, '0')}-${String(twoDaysAgo.getDate()).padStart(2, '0')}`
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const seeded: DailyCache = {
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version: DAILY_CACHE_VERSION,
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savingsConfigHash: 'cfg-A',
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lastComputedDate: twoDaysAgoStr,
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days: [emptyDay(twoDaysAgoStr, 1.5, 3)],
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}
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await saveDailyCache(seeded)
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const parseSessions = async (): Promise<ProjectSummary[]> => []
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const aggregateDays = (): DailyEntry[] => []
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// Hash mismatch → ensureCacheHydrated must drop the stale day and start fresh.
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const rehydrated = await ensureCacheHydrated(parseSessions, aggregateDays, 'cfg-B')
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expect(rehydrated.savingsConfigHash).toBe('cfg-B')
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expect(rehydrated.days).toEqual([])
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// Same hash → cached days survive.
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const seeded2: DailyCache = {
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version: DAILY_CACHE_VERSION,
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savingsConfigHash: 'cfg-C',
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lastComputedDate: twoDaysAgoStr,
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days: [emptyDay(twoDaysAgoStr, 1.5, 3)],
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}
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await saveDailyCache(seeded2)
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const preserved = await ensureCacheHydrated(parseSessions, aggregateDays, 'cfg-C')
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expect(preserved.days).toHaveLength(1)
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expect(preserved.days[0]!.date).toBe(twoDaysAgoStr)
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})
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})
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