Tianyi Cui
3bef6b38c7
The `materialized` INTEGER column was redundant: create()/update() already keep a lazy session in memory and write no row, so a `sessions` row is written only by the first append. Its EXISTENCE is the materialization signal — has()/list() now report exactly the sessions that have a row, matching the JSONL backend's "file exists ⇔ materialized". The column only existed to force has()/list() to FALSE for an all-tail crash (a partial first turn, zero committed events). That actually DIVERGED from the JSONL backend, whose file (and thus has()=true) survives a first append that never reached turn/end. Removing the column drops that special case: an all-tail session keeps its row and stays present, the same as JSONL. The orphaned tail rows are still removed by the deferred truncation-repair on the next append, and load() stays non-mutating. Also: add a TODO to route through a cordis db service if one is adopted, and correct the README's Node-version framing to the repo's engines (>=24).
714 lines
34 KiB
TypeScript
714 lines
34 KiB
TypeScript
import { afterEach, describe, expect, it } from 'vitest'
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import { Context } from 'cordis'
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import { mkdtemp, rm } from 'node:fs/promises'
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import { tmpdir } from 'node:os'
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import { join } from 'node:path'
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import SessionStore, { SessionId } from '@deepseek-ai/dsh-session'
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import type { Session, SessionEvent, SessionMeta } from '@deepseek-ai/dsh-session'
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import SessionPersistenceSqlite, { SCHEMA_VERSION } from '@deepseek-ai/dsh-session-persistence-sqlite'
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import { cutAtLastTurnEnd, openDatabase } from '../src/schema.ts'
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import { runPersistenceContract, meta, oneTurnLog } from '../../session-persistence/tests/contract.ts'
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const dirs: string[] = []
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afterEach(async () => { for (const d of dirs.splice(0)) await rm(d, { recursive: true, force: true }) })
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async function freshDbPath(): Promise<string> {
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const dir = await mkdtemp(join(tmpdir(), 'dsh-sqlite-'))
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dirs.push(dir)
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return join(dir, 'sessions.db')
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}
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/** A context with the session store + SQLite backend, plus a teardown. */
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async function backend(path = ':memory:'): Promise<{ ctx: Context; dispose: () => Promise<void> }> {
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const ctx = new Context()
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await ctx.plugin(SessionStore)
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const fiber = await ctx.plugin(SessionPersistenceSqlite, { path })
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return { ctx, dispose: () => fiber.dispose() }
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}
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// The payoff: the SAME backend-agnostic contract the JSONL backend runs, now
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// proving the SQLite backend satisfies identical semantics.
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runPersistenceContract('sqlite', async () => {
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const ctx = new Context()
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await ctx.plugin(SessionStore)
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const fiber = await ctx.plugin(SessionPersistenceSqlite, { path: ':memory:' })
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return {
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persistence: ctx.sessionPersistence,
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dispose: async () => { await fiber.dispose() },
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}
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})
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describe('cutAtLastTurnEnd', () => {
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it('returns the prefix through the last complete turn/end and flags a cut tail', () => {
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const log = oneTurnLog()
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const withTail: SessionEvent[] = [
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...log,
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{ type: 'turn/start', seq: 6, time: 7, data: { turn: 2, trigger: { kind: 'message', source: { kind: 'user' } } } },
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{ type: 'user/message', seq: 7, time: 8, data: { content: [{ type: 'text', text: 'q2' }], source: { kind: 'user' } } },
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]
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const { committed, cutTail } = cutAtLastTurnEnd(withTail)
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expect(committed).toEqual(log)
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expect(cutTail).toBe(true)
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})
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it('treats a log with no turn/end as fully uncommitted', () => {
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const partial: SessionEvent[] = [
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{ type: 'turn/start', seq: 0, time: 1, data: { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } } },
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{ type: 'user/message', seq: 1, time: 2, data: { content: [{ type: 'text', text: 'hi' }], source: { kind: 'user' } } },
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]
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expect(cutAtLastTurnEnd(partial)).toEqual({ committed: [], cutTail: true })
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})
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it('reports no cut when the log ends exactly on a turn/end', () => {
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const { committed, cutTail } = cutAtLastTurnEnd(oneTurnLog())
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expect(committed).toEqual(oneTurnLog())
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expect(cutTail).toBe(false)
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})
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it('an empty log is committed-empty with no tail', () => {
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expect(cutAtLastTurnEnd([])).toEqual({ committed: [], cutTail: false })
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})
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it('throws on a seq gap inside the committed region', () => {
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const gapped: SessionEvent[] = [
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{ type: 'turn/start', seq: 0, time: 1, data: { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } } },
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{ type: 'step/start', seq: 2, time: 2, data: { turn: 1, step: 1 } }, // seq 1 missing
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{ type: 'turn/end', seq: 3, time: 3, data: { turn: 1, reason: { kind: 'completed' } } },
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]
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expect(() => cutAtLastTurnEnd(gapped)).toThrow(/seq gap in committed region/)
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})
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})
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describe('SessionPersistenceSqlite: durability and crash semantics', () => {
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it('a crash tail (rows after the last turn/end) is excluded on load and repaired on the next append', async () => {
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const path = await freshDbPath()
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const m = meta('crash')
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// Run 1: persist a complete turn, then a half-written second turn (no turn/end).
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const ctx1 = new Context()
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await ctx1.plugin(SessionStore)
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const fiber1 = await ctx1.plugin(SessionPersistenceSqlite, { path })
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await ctx1.sessionPersistence.create(m)
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await ctx1.sessionPersistence.append(m.id, oneTurnLog())
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await ctx1.sessionPersistence.append(m.id, [
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{ type: 'turn/start', seq: 6, time: 7, data: { turn: 2, trigger: { kind: 'message', source: { kind: 'user' } } } },
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{ type: 'user/message', seq: 7, time: 8, data: { content: [{ type: 'text', text: 'q2' }], source: { kind: 'user' } } },
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])
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await fiber1.dispose()
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// Run 2: load returns only the committed first turn (tail excluded).
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const ctx2 = new Context()
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await ctx2.plugin(SessionStore)
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const fiber2 = await ctx2.plugin(SessionPersistenceSqlite, { path })
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const loaded = await ctx2.sessionPersistence.load(m.id)
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expect(loaded.events).toEqual(oneTurnLog())
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// The next append continues at seq 6 and performs the deferred truncation-
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// repair inside its transaction (DELETE seq >= 6 before inserting), so the
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// orphaned tail rows are gone and there is no UNIQUE collision.
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await ctx2.sessionPersistence.append(m.id, [
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{ type: 'turn/start', seq: 6, time: 9, data: { turn: 2, trigger: { kind: 'message', source: { kind: 'user' } } } },
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{ type: 'turn/end', seq: 7, time: 10, data: { turn: 2, reason: { kind: 'completed' } } },
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])
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const reloaded = await ctx2.sessionPersistence.load(m.id)
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expect(reloaded.events.map(e => e.seq)).toEqual([0, 1, 2, 3, 4, 5, 6, 7])
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await fiber2.dispose()
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})
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it('load() is non-mutating: the crash tail rows survive until the next append repairs them', async () => {
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const path = await freshDbPath()
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const m = meta('load-nonmutating')
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const b1 = await backend(path)
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await b1.ctx.sessionPersistence.create(m)
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await b1.ctx.sessionPersistence.append(m.id, oneTurnLog()) // seqs 0..5
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await b1.dispose()
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// Hand-write an uncommitted tail (seq 6, no turn/end).
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const db = openDatabase(path)
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db.prepare('INSERT INTO events (session_id, seq, type, time, data) VALUES (?, 6, ?, 7, ?)')
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.run(m.id, 'turn/start', JSON.stringify({ turn: 2, trigger: { kind: 'message', source: { kind: 'user' } } }))
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db.close()
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const b2 = await backend(path)
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const loaded = await b2.ctx.sessionPersistence.load(m.id)
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expect(loaded.events).toEqual(oneTurnLog())
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// load() must NOT have deleted the tail row (contract: load returns the
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// prefix; the next append repairs). Verify the row is still on disk.
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const probe = openDatabase(path)
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const tailRows = probe.prepare('SELECT seq FROM events WHERE session_id = ? AND seq >= 6').all(m.id)
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probe.close()
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expect(tailRows).toHaveLength(1)
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await b2.dispose()
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})
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it('all-tail load: a session materialized by a partial first turn stays present (JSONL parity), load returns zero committed events', async () => {
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const path = await freshDbPath()
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const m = meta('all-tail')
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const b1 = await backend(path)
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await b1.ctx.sessionPersistence.create(m)
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// A first turn that NEVER completed: turn/start + user/message, no turn/end.
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await b1.ctx.sessionPersistence.append(m.id, [
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{ type: 'turn/start', seq: 0, time: 1, data: { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } } },
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{ type: 'user/message', seq: 1, time: 2, data: { content: [{ type: 'text', text: 'hi' }], source: { kind: 'user' } } },
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])
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expect(await b1.ctx.sessionPersistence.has(m.id)).toBe(true) // materialized
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await b1.dispose()
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// A fresh backend loads it: the committed prefix is empty (no turn/end), so
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// load returns zero events — but the session WAS materialized (its metadata
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// row exists), so has()/list() still report it present, matching the JSONL
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// backend whose file likewise survives a first append that never reached
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// turn/end. The orphaned tail rows are removed by the next append's repair.
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const b2 = await backend(path)
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const loaded = await b2.ctx.sessionPersistence.load(m.id)
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expect(loaded.events).toEqual([])
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expect(await b2.ctx.sessionPersistence.has(m.id)).toBe(true)
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expect((await b2.ctx.sessionPersistence.list()).map(x => x.id)).toContain(m.id)
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await b2.dispose()
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})
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it('rejects opening a database whose schema version is newer than this build', async () => {
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const path = await freshDbPath()
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openDatabase(path).close() // stamp user_version = SCHEMA_VERSION
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// Bump user_version past what this build supports.
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const db = openDatabase(path)
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db.exec(`PRAGMA user_version = ${SCHEMA_VERSION + 1}`)
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db.close()
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expect(() => openDatabase(path)).toThrow(/newer than this build/)
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})
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it('append snapshots the batch: mutating an event after the call does not corrupt the persisted copy', async () => {
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const ctx = new Context()
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await ctx.plugin(SessionStore)
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const fiber = await ctx.plugin(SessionPersistenceSqlite, { path: ':memory:' })
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const m = meta('snapshot')
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await ctx.sessionPersistence.create(m)
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const batch: SessionEvent[] = [
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{ type: 'turn/start', seq: 0, time: 1, data: { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } } },
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{ type: 'user/message', seq: 1, time: 2, data: { content: [{ type: 'text', text: 'original' }], source: { kind: 'user' } } },
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{ type: 'turn/end', seq: 2, time: 3, data: { turn: 1, reason: { kind: 'completed' } } },
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]
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const p = ctx.sessionPersistence.append(m.id, batch)
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// Mutate the live array AND an event's data AFTER the call but before it
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// drains behind the per-session chain. The snapshot taken at call time must
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// shield the persisted copy.
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;(batch[1]!.data as { content: { type: 'text'; text: string }[] }).content[0]!.text = 'HACKED'
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batch.push({ type: 'user/message', seq: 3, time: 4, data: { content: [{ type: 'text', text: 'injected' }], source: { kind: 'user' } } })
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await p
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const loaded = await ctx.sessionPersistence.load(m.id)
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expect(loaded.events).toHaveLength(3) // the pushed event was not persisted
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const um = loaded.events[1]
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expect(um?.type === 'user/message' && (um.data.content[0] as { text: string }).text).toBe('original')
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await fiber.dispose()
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})
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it('a corrupt-JSON row in the uncommitted tail is discarded on load, not unloadable', async () => {
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const path = await freshDbPath()
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const m = meta('corrupt-tail')
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const b1 = await backend(path)
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await b1.ctx.sessionPersistence.create(m)
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await b1.ctx.sessionPersistence.append(m.id, oneTurnLog()) // committed: seqs 0..5
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await b1.dispose()
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// Hand-insert an uncommitted tail row (seq 6, no closing turn/end) whose
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// `data` is invalid JSON. The contract: only a parse error in the COMMITTED
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// region is unloadable; a corrupt tail must be discarded (load cuts at the
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// last turn/end using seq+type columns, never parsing tail `data`).
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const db = openDatabase(path)
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db.prepare('INSERT INTO events (session_id, seq, type, time, data) VALUES (?, 6, ?, 7, ?)')
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.run(m.id, 'turn/start', '{not valid json')
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db.close()
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const b2 = await backend(path)
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const loaded = await b2.ctx.sessionPersistence.load(m.id)
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expect(loaded.events).toEqual(oneTurnLog()) // tail discarded, committed intact
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// The corrupt tail row was physically deleted, so a fresh append continues.
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await b2.ctx.sessionPersistence.append(m.id, [
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{ type: 'turn/start', seq: 6, time: 8, data: { turn: 2, trigger: { kind: 'message', source: { kind: 'user' } } } },
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{ type: 'turn/end', seq: 7, time: 9, data: { turn: 2, reason: { kind: 'completed' } } },
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])
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const reloaded = await b2.ctx.sessionPersistence.load(m.id)
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expect(reloaded.events.map(e => e.seq)).toEqual([0, 1, 2, 3, 4, 5, 6, 7])
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await b2.dispose()
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})
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it('append rolls back the whole batch on a mid-batch seq collision (transaction)', async () => {
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const ctx = new Context()
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await ctx.plugin(SessionStore)
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const fiber = await ctx.plugin(SessionPersistenceSqlite, { path: ':memory:' })
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const m = meta('rollback')
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await ctx.sessionPersistence.create(m)
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await ctx.sessionPersistence.append(m.id, oneTurnLog()) // seqs 0..5
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// A batch that re-states an already-stored seq must be rejected and leave
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// the stored log unchanged (the UNIQUE (session_id, seq) constraint fires
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// inside the transaction → ROLLBACK).
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await expect(ctx.sessionPersistence.append(m.id, oneTurnLog())).rejects.toThrow()
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const loaded = await ctx.sessionPersistence.load(m.id)
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expect(loaded.events).toEqual(oneTurnLog()) // unchanged
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await fiber.dispose()
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})
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it('persists across separate backend instances over the same file', async () => {
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const path = await freshDbPath()
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const m = meta('persist', '/proj')
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const ctx1 = new Context()
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await ctx1.plugin(SessionStore)
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const fiber1 = await ctx1.plugin(SessionPersistenceSqlite, { path })
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await ctx1.sessionPersistence.create(m)
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await ctx1.sessionPersistence.append(m.id, oneTurnLog())
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await ctx1.sessionPersistence.update(m.id, { title: 'T', firstPrompt: 'hi' })
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await fiber1.dispose()
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const ctx2 = new Context()
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await ctx2.plugin(SessionStore)
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const fiber2 = await ctx2.plugin(SessionPersistenceSqlite, { path })
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expect((await ctx2.sessionPersistence.list()).map(x => x.id)).toContain(m.id)
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const loaded = await ctx2.sessionPersistence.load(m.id)
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expect(loaded.meta).toMatchObject({ id: m.id, cwd: '/proj', title: 'T', firstPrompt: 'hi' })
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expect(loaded.events).toEqual(oneTurnLog())
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await fiber2.dispose()
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})
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it('rejects an unknown format version on load', async () => {
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const path = await freshDbPath()
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// Materialize a row with version 2 directly via the real schema.
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const db = openDatabase(path)
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db.prepare('INSERT INTO sessions (id, version, created_at, updated_at) VALUES (?, ?, ?, ?)')
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.run('v2', 2, 1, 1)
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db.close()
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const ctx = new Context()
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await ctx.plugin(SessionStore)
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const fiber = await ctx.plugin(SessionPersistenceSqlite, { path })
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await expect(ctx.sessionPersistence.load(SessionId('v2'))).rejects.toThrow(/version 2/)
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await fiber.dispose()
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})
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it('create rejects a duplicate id (in memory and on a persisted row)', async () => {
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const path = await freshDbPath()
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const m = meta('dup')
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const ctx = new Context()
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await ctx.plugin(SessionStore)
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const fiber = await ctx.plugin(SessionPersistenceSqlite, { path })
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await ctx.sessionPersistence.create(m)
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// Same in-memory state.
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await expect(ctx.sessionPersistence.create(m)).rejects.toThrow(/already exists/)
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await ctx.sessionPersistence.append(m.id, oneTurnLog())
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await fiber.dispose()
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// A fresh instance over the same file sees the persisted row.
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const ctx2 = new Context()
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await ctx2.plugin(SessionStore)
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const fiber2 = await ctx2.plugin(SessionPersistenceSqlite, { path })
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await expect(ctx2.sessionPersistence.create(m)).rejects.toThrow(/already has a persisted row/)
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await fiber2.dispose()
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})
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it('exposes the schema version constant', () => {
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expect(SCHEMA_VERSION).toBe(1)
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})
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})
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describe('SessionPersistenceSqlite: write path (session/event → flush)', () => {
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function send(session: Session, events: SessionEvent[]): void {
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for (const e of events) session.append(e.type, e.data)
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}
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it('persists a turn appended through the live session on flush', async () => {
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const ctx = new Context()
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await ctx.plugin(SessionStore)
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const fiber = await ctx.plugin(SessionPersistenceSqlite, { path: ':memory:' })
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const session = ctx.sessions.create('w1')
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send(session, oneTurnLog())
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await ctx.parallel('session/flush', session)
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const loaded = await ctx.sessionPersistence.load(SessionId('w1'))
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expect(loaded.events.map(e => e.type)).toEqual(oneTurnLog().map(e => e.type))
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await fiber.dispose()
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})
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it('a resumed session does not re-append its seed', async () => {
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const path = await freshDbPath()
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// Run 1: persist a full turn through the live session.
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const ctx1 = new Context()
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await ctx1.plugin(SessionStore)
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const fiber1 = await ctx1.plugin(SessionPersistenceSqlite, { path })
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const s1 = ctx1.sessions.create('resume')
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for (const e of oneTurnLog()) s1.append(e.type, e.data)
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await ctx1.parallel('session/flush', s1)
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await fiber1.dispose()
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// Run 2: reconstruct the live session from the loaded log (seed), then add a
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// second turn. The seed must NOT be re-appended (no UNIQUE collision), and
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// the second turn continues the seq.
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const ctx2 = new Context()
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await ctx2.plugin(SessionStore)
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const fiber2 = await ctx2.plugin(SessionPersistenceSqlite, { path })
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const { events } = await ctx2.sessionPersistence.load(SessionId('resume'))
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const s2 = ctx2.sessions.create('resume', { seed: events })
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s2.append('turn/start', { turn: 2, trigger: { kind: 'message', source: { kind: 'user' } } })
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s2.append('turn/end', { turn: 2, reason: { kind: 'completed' } })
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await ctx2.parallel('session/flush', s2)
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const reloaded = await ctx2.sessionPersistence.load(SessionId('resume'))
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expect(reloaded.events.map(e => e.seq)).toEqual([0, 1, 2, 3, 4, 5, 6, 7])
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await fiber2.dispose()
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})
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it('HMR: applying the plugin seeds existing live sessions', async () => {
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const ctx = new Context()
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await ctx.plugin(SessionStore)
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const session = ctx.sessions.create('hmr')
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for (const e of oneTurnLog()) session.append(e.type, e.data)
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// Plugin applied AFTER the session already has events.
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const fiber = await ctx.plugin(SessionPersistenceSqlite, { path: ':memory:' })
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await ctx.parallel('session/flush', session)
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expect(await ctx.sessionPersistence.has(SessionId('hmr'))).toBe(true)
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await fiber.dispose()
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})
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it('dispose drains a pending buffer before closing the database', async () => {
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const path = await freshDbPath()
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const ctx = new Context()
|
|
await ctx.plugin(SessionStore)
|
|
const fiber = await ctx.plugin(SessionPersistenceSqlite, { path })
|
|
const session = ctx.sessions.create('drain')
|
|
for (const e of oneTurnLog()) session.append(e.type, e.data)
|
|
// No explicit flush — dispose must drain the buffer.
|
|
await fiber.dispose()
|
|
|
|
const ctx2 = new Context()
|
|
await ctx2.plugin(SessionStore)
|
|
const fiber2 = await ctx2.plugin(SessionPersistenceSqlite, { path })
|
|
expect(await ctx2.sessionPersistence.has(SessionId('drain'))).toBe(true)
|
|
await fiber2.dispose()
|
|
})
|
|
|
|
it('rejects a different live session colliding on a persisted id', async () => {
|
|
const path = await freshDbPath()
|
|
const ctx1 = new Context()
|
|
await ctx1.plugin(SessionStore)
|
|
const fiber1 = await ctx1.plugin(SessionPersistenceSqlite, { path })
|
|
const s1 = ctx1.sessions.create('collide')
|
|
for (const e of oneTurnLog()) s1.append(e.type, e.data)
|
|
await ctx1.parallel('session/flush', s1)
|
|
await fiber1.dispose()
|
|
|
|
// A fresh, unrelated session reusing the id (no seed) must be rejected.
|
|
const ctx2 = new Context()
|
|
await ctx2.plugin(SessionStore)
|
|
const fiber2 = await ctx2.plugin(SessionPersistenceSqlite, { path })
|
|
const s2 = ctx2.sessions.create('collide')
|
|
s2.append('turn/start', { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } })
|
|
await expect(ctx2.parallel('session/flush', s2)).rejects.toThrow(/id collision/)
|
|
await fiber2.dispose()
|
|
})
|
|
|
|
it('update before the first append keeps the summary in memory and the session lazy', async () => {
|
|
const ctx = new Context()
|
|
await ctx.plugin(SessionStore)
|
|
const fiber = await ctx.plugin(SessionPersistenceSqlite, { path: ':memory:' })
|
|
const m = meta('lazy-update')
|
|
await ctx.sessionPersistence.create(m)
|
|
await ctx.sessionPersistence.update(m.id, { title: 'pending' })
|
|
// Still lazy: no materialized row yet.
|
|
expect(await ctx.sessionPersistence.has(m.id)).toBe(false)
|
|
// The first append materializes and carries the pending title.
|
|
await ctx.sessionPersistence.append(m.id, oneTurnLog())
|
|
const loaded = await ctx.sessionPersistence.load(m.id)
|
|
expect(loaded.meta.title).toBe('pending')
|
|
await fiber.dispose()
|
|
})
|
|
})
|
|
|
|
describe('SessionPersistenceSqlite: edge cases', () => {
|
|
it('append of an empty batch is a no-op', async () => {
|
|
const { ctx, dispose } = await backend()
|
|
const m = meta('empty-batch')
|
|
await ctx.sessionPersistence.create(m)
|
|
await ctx.sessionPersistence.append(m.id, [])
|
|
expect(await ctx.sessionPersistence.has(m.id)).toBe(false) // still lazy
|
|
await dispose()
|
|
})
|
|
|
|
it('load rejects a missing session', async () => {
|
|
const { ctx, dispose } = await backend()
|
|
await expect(ctx.sessionPersistence.load(SessionId('nope'))).rejects.toThrow(/not found/)
|
|
await dispose()
|
|
})
|
|
|
|
it('delete of a non-existent session is a no-op', async () => {
|
|
const { ctx, dispose } = await backend()
|
|
await ctx.sessionPersistence.delete(SessionId('ghost'))
|
|
expect(await ctx.sessionPersistence.has(SessionId('ghost'))).toBe(false)
|
|
await dispose()
|
|
})
|
|
|
|
it('append adopts a session that exists only in the DB (fresh instance)', async () => {
|
|
const path = await freshDbPath()
|
|
const m = meta('adopt-append')
|
|
const b1 = await backend(path)
|
|
await b1.ctx.sessionPersistence.create(m)
|
|
await b1.ctx.sessionPersistence.append(m.id, oneTurnLog())
|
|
await b1.dispose()
|
|
|
|
// A fresh instance appends a second turn WITHOUT a prior create/load: append
|
|
// must adopt the on-disk row (cursor = stored length) and continue the seq.
|
|
const b2 = await backend(path)
|
|
await b2.ctx.sessionPersistence.append(m.id, [
|
|
{ type: 'turn/start', seq: 6, time: 7, data: { turn: 2, trigger: { kind: 'message', source: { kind: 'user' } } } },
|
|
{ type: 'turn/end', seq: 7, time: 8, data: { turn: 2, reason: { kind: 'completed' } } },
|
|
])
|
|
const loaded = await b2.ctx.sessionPersistence.load(m.id)
|
|
expect(loaded.events.map(e => e.seq)).toEqual([0, 1, 2, 3, 4, 5, 6, 7])
|
|
await b2.dispose()
|
|
})
|
|
|
|
it('update adopts a session that exists only in the DB (fresh instance)', async () => {
|
|
const path = await freshDbPath()
|
|
const m = meta('adopt-update')
|
|
const b1 = await backend(path)
|
|
await b1.ctx.sessionPersistence.create(m)
|
|
await b1.ctx.sessionPersistence.append(m.id, oneTurnLog())
|
|
await b1.dispose()
|
|
|
|
const b2 = await backend(path)
|
|
await b2.ctx.sessionPersistence.update(m.id, { title: 'after restart' })
|
|
const loaded = await b2.ctx.sessionPersistence.load(m.id)
|
|
expect(loaded.meta.title).toBe('after restart')
|
|
await b2.dispose()
|
|
})
|
|
|
|
it('append rolls back and rethrows when an event INSERT fails inside the transaction', async () => {
|
|
const path = await freshDbPath()
|
|
const m = meta('rollback-insert')
|
|
const b1 = await backend(path)
|
|
await b1.ctx.sessionPersistence.create(m)
|
|
await b1.ctx.sessionPersistence.append(m.id, oneTurnLog())
|
|
|
|
// A SECOND backend over the same file loads the session first, so it adopts
|
|
// cursor 6 (the committed length) into its OWN in-memory state.
|
|
const b2 = await backend(path)
|
|
await b2.ctx.sessionPersistence.load(m.id) // cursor 6 in b2
|
|
const turn2: SessionEvent[] = [
|
|
{ type: 'turn/start', seq: 6, time: 7, data: { turn: 2, trigger: { kind: 'message', source: { kind: 'user' } } } },
|
|
{ type: 'turn/end', seq: 7, time: 8, data: { turn: 2, reason: { kind: 'completed' } } },
|
|
]
|
|
// b1 commits seq 6..7 first.
|
|
await b1.ctx.sessionPersistence.append(m.id, turn2)
|
|
// b2 still thinks its cursor is 6, so this batch passes the contiguity check
|
|
// but its INSERT of seq 6 hits the UNIQUE (session_id, seq) constraint
|
|
// mid-transaction → ROLLBACK + rethrow.
|
|
await expect(b2.ctx.sessionPersistence.append(m.id, turn2)).rejects.toThrow(/UNIQUE/)
|
|
// b1's turn is intact; b2's rolled-back attempt left nothing extra.
|
|
const loaded = await b1.ctx.sessionPersistence.load(m.id)
|
|
expect(loaded.events.map(e => e.seq)).toEqual([0, 1, 2, 3, 4, 5, 6, 7])
|
|
await b1.dispose()
|
|
await b2.dispose()
|
|
})
|
|
|
|
it('round-trips a header with parentSession (fork lineage)', async () => {
|
|
const { ctx, dispose } = await backend()
|
|
const m: SessionMeta = { ...meta('child'), parentSession: SessionId('parent') }
|
|
await ctx.sessionPersistence.create(m)
|
|
await ctx.sessionPersistence.append(m.id, oneTurnLog())
|
|
const loaded = await ctx.sessionPersistence.load(m.id)
|
|
expect(loaded.meta.parentSession).toBe(SessionId('parent'))
|
|
await dispose()
|
|
})
|
|
|
|
it('a fresh live session reusing a previously-loaded id is rejected (ownerless guard)', async () => {
|
|
const path = await freshDbPath()
|
|
const m = meta('ownerless')
|
|
const b1 = await backend(path)
|
|
await b1.ctx.sessionPersistence.create(m)
|
|
await b1.ctx.sessionPersistence.append(m.id, oneTurnLog())
|
|
await b1.dispose()
|
|
|
|
const b2 = await backend(path)
|
|
// load() leaves ownerless state with cursor 6.
|
|
await b2.ctx.sessionPersistence.load(m.id)
|
|
// A fresh, unrelated live session reusing the id has a shorter/non-matching
|
|
// seed → its onCreated must reject rather than graft onto the loaded prefix.
|
|
const s = b2.ctx.sessions.create('ownerless')
|
|
s.append('turn/start', { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } })
|
|
await expect(b2.ctx.parallel('session/flush', s)).rejects.toThrow(/id collision/)
|
|
await b2.dispose()
|
|
})
|
|
|
|
it('a live session whose seed matches the loaded prefix claims ownerless state and persists the suffix', async () => {
|
|
const path = await freshDbPath()
|
|
const m = meta('claim')
|
|
const b1 = await backend(path)
|
|
await b1.ctx.sessionPersistence.create(m)
|
|
await b1.ctx.sessionPersistence.append(m.id, oneTurnLog())
|
|
await b1.dispose()
|
|
|
|
const b2 = await backend(path)
|
|
const { events } = await b2.ctx.sessionPersistence.load(m.id) // ownerless, cursor 6
|
|
// A live session seeded with the loaded log PLUS a new turn claims the state
|
|
// and persists only the suffix.
|
|
const s = b2.ctx.sessions.create('claim', { seed: [
|
|
...events,
|
|
{ type: 'turn/start', seq: 6, time: 7, data: { turn: 2, trigger: { kind: 'message', source: { kind: 'user' } } } },
|
|
{ type: 'turn/end', seq: 7, time: 8, data: { turn: 2, reason: { kind: 'completed' } } },
|
|
] })
|
|
await b2.ctx.parallel('session/flush', s)
|
|
const loaded = await b2.ctx.sessionPersistence.load(m.id)
|
|
expect(loaded.events.map(e => e.seq)).toEqual([0, 1, 2, 3, 4, 5, 6, 7])
|
|
await b2.dispose()
|
|
})
|
|
|
|
it('an abandoned lazy session (never materialized) releases its id for reuse', async () => {
|
|
const { ctx, dispose } = await backend()
|
|
const inits = (ctx.sessionPersistence as unknown as { inits: Map<Session, Promise<void>> }).inits
|
|
let first!: Session
|
|
const firstFiber = await ctx.plugin(Object.assign((inner: Context) => {
|
|
first = inner.sessions.create('reuse')
|
|
}, { inject: ['sessions'] }))
|
|
await inits.get(first) // let the lazy create register the state
|
|
await firstFiber.dispose() // disposed before any append → never materialized
|
|
|
|
let reuse!: Session
|
|
await ctx.plugin(Object.assign((inner: Context) => {
|
|
reuse = inner.sessions.create('reuse')
|
|
}, { inject: ['sessions'] }))
|
|
await expect(inits.get(reuse)).resolves.toBeUndefined()
|
|
reuse.append('turn/start', { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } })
|
|
reuse.append('turn/end', { turn: 1, reason: { kind: 'completed' } })
|
|
await ctx.parallel('session/flush', reuse)
|
|
expect(await ctx.sessionPersistence.has(SessionId('reuse'))).toBe(true)
|
|
await dispose()
|
|
})
|
|
|
|
it('does NOT reclaim an id whose abandoned owner still has buffered (unflushed) events', async () => {
|
|
const { ctx, dispose } = await backend()
|
|
const inits = (ctx.sessionPersistence as unknown as { inits: Map<Session, Promise<void>> }).inits
|
|
let first!: Session
|
|
const firstFiber = await ctx.plugin(Object.assign((inner: Context) => {
|
|
first = inner.sessions.create('buffered')
|
|
}, { inject: ['sessions'] }))
|
|
await inits.get(first)
|
|
// Append a turn but do NOT flush — events sit in the write-behind buffer.
|
|
first.append('turn/start', { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } })
|
|
first.append('turn/end', { turn: 1, reason: { kind: 'completed' } })
|
|
await firstFiber.dispose() // disposed before flush; not materialized, buffer pending
|
|
|
|
let reuse!: Session
|
|
await ctx.plugin(Object.assign((inner: Context) => {
|
|
reuse = inner.sessions.create('buffered')
|
|
}, { inject: ['sessions'] }))
|
|
await expect(inits.get(reuse)).rejects.toThrow(/already bound to a different live session/)
|
|
await dispose()
|
|
})
|
|
|
|
it('initFor is idempotent: re-emitting session/created does not re-initialize', async () => {
|
|
const { ctx, dispose } = await backend()
|
|
const session = ctx.sessions.create('idem')
|
|
ctx.emit('session/created', session) // second create event for the same object
|
|
session.append('turn/start', { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } })
|
|
session.append('turn/end', { turn: 1, reason: { kind: 'completed' } })
|
|
await ctx.parallel('session/flush', session)
|
|
expect(await ctx.sessionPersistence.has(SessionId('idem'))).toBe(true)
|
|
await dispose()
|
|
})
|
|
|
|
it('a live session claims cursor-0 ownerless state created via the public API and persists its seed', async () => {
|
|
const { ctx, dispose } = await backend()
|
|
// create() registers ownerless state with cursor 0 (no events yet).
|
|
await ctx.sessionPersistence.create(meta('cursor0'))
|
|
// A live session reusing that id, seeded with a turn, claims the ownerless
|
|
// state (cursor 0 trivially matches any seed) and persists the whole seed.
|
|
const s = ctx.sessions.create('cursor0', { seed: [
|
|
{ type: 'turn/start', seq: 0, time: 1, data: { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } } },
|
|
{ type: 'turn/end', seq: 1, time: 2, data: { turn: 1, reason: { kind: 'completed' } } },
|
|
] })
|
|
await ctx.parallel('session/flush', s)
|
|
const loaded = await ctx.sessionPersistence.load(SessionId('cursor0'))
|
|
expect(loaded.events.map(e => e.seq)).toEqual([0, 1])
|
|
await dispose()
|
|
})
|
|
|
|
it('HMR: reloading the backend adopts a still-live, already-materialized session', async () => {
|
|
const path = await freshDbPath()
|
|
const ctx = new Context()
|
|
await ctx.plugin(SessionStore)
|
|
// The session lives in its OWN fiber so it survives the backend reload.
|
|
let session!: Session
|
|
await ctx.plugin(Object.assign((inner: Context) => {
|
|
session = inner.sessions.create('hmr-adopt')
|
|
}, { inject: ['sessions'] }))
|
|
|
|
// Backend instance 1 materializes the session on disk.
|
|
const backend1 = await ctx.plugin(SessionPersistenceSqlite, { path })
|
|
session.append('turn/start', { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } })
|
|
session.append('user/message', { content: [{ type: 'text', text: 'hi' }], source: { kind: 'user' } })
|
|
session.append('turn/end', { turn: 1, reason: { kind: 'completed' } })
|
|
await ctx.parallel('session/flush', session)
|
|
|
|
// Hot-reload: dispose instance 1, plug in instance 2 over the SAME file
|
|
// while the session stays live. Instance 2 has an empty states map but the
|
|
// row is materialized on disk and is a prefix of the live events — it must
|
|
// ADOPT (not reject), and a second turn then persists.
|
|
await backend1.dispose()
|
|
await ctx.plugin(SessionPersistenceSqlite, { path })
|
|
session.append('turn/start', { turn: 2, trigger: { kind: 'message', source: { kind: 'user' } } })
|
|
session.append('turn/end', { turn: 2, reason: { kind: 'completed' } })
|
|
await expect(ctx.parallel('session/flush', session)).resolves.not.toThrow()
|
|
|
|
const loaded = await ctx.sessionPersistence.load(SessionId('hmr-adopt'))
|
|
expect(loaded.events.filter(e => e.type === 'turn/start')).toHaveLength(2)
|
|
await ctx.fiber.dispose()
|
|
})
|
|
|
|
it('HMR: adoption persists the live SUFFIX that was ahead of the on-disk prefix', async () => {
|
|
const path = await freshDbPath()
|
|
const ctx = new Context()
|
|
await ctx.plugin(SessionStore)
|
|
let session!: Session
|
|
await ctx.plugin(Object.assign((inner: Context) => {
|
|
session = inner.sessions.create('hmr-suffix')
|
|
}, { inject: ['sessions'] }))
|
|
|
|
const backend1 = await ctx.plugin(SessionPersistenceSqlite, { path })
|
|
session.append('turn/start', { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } })
|
|
session.append('turn/end', { turn: 1, reason: { kind: 'completed' } })
|
|
await ctx.parallel('session/flush', session)
|
|
|
|
// Append turn 2 to the LIVE session, then dispose instance 1 WITHOUT
|
|
// flushing turn 2: it is now ONLY in the live session's events.
|
|
await backend1.dispose()
|
|
session.append('turn/start', { turn: 2, trigger: { kind: 'message', source: { kind: 'user' } } })
|
|
session.append('turn/end', { turn: 2, reason: { kind: 'completed' } })
|
|
|
|
// Instance 2 adopts the on-disk prefix (turn 1) and MUST persist the live
|
|
// suffix (turn 2) carried in the session's events.
|
|
await ctx.plugin(SessionPersistenceSqlite, { path })
|
|
await ctx.parallel('session/flush', session)
|
|
const loaded = await ctx.sessionPersistence.load(SessionId('hmr-suffix'))
|
|
expect(loaded.events.map(e => e.seq)).toEqual([0, 1, 2, 3])
|
|
expect(loaded.events.filter(e => e.type === 'turn/start')).toHaveLength(2)
|
|
await ctx.fiber.dispose()
|
|
})
|
|
|
|
it('HMR: a DIFFERENT session colliding with a materialized on-disk id is rejected', async () => {
|
|
const path = await freshDbPath()
|
|
// Instance 1 materializes a session and disposes.
|
|
const b1 = await backend(path)
|
|
const s1 = b1.ctx.sessions.create('hmr-collide')
|
|
for (const e of oneTurnLog()) s1.append(e.type, e.data)
|
|
await b1.ctx.parallel('session/flush', s1)
|
|
await b1.dispose()
|
|
|
|
// A fresh context with an UNRELATED live session reusing the id meets a
|
|
// materialized row that is NOT a prefix of its events → reject.
|
|
const ctx = new Context()
|
|
await ctx.plugin(SessionStore)
|
|
let session!: Session
|
|
await ctx.plugin(Object.assign((inner: Context) => {
|
|
session = inner.sessions.create('hmr-collide')
|
|
}, { inject: ['sessions'] }))
|
|
session.append('turn/start', { turn: 9, trigger: { kind: 'message', source: { kind: 'user' } } })
|
|
await ctx.plugin(SessionPersistenceSqlite, { path })
|
|
await expect(ctx.parallel('session/flush', session)).rejects.toThrow(/id collision/)
|
|
await ctx.fiber.dispose()
|
|
})
|
|
})
|