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feat(trajectory): virtualize long session histories

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This commit is contained in:
_Kerman
2026-08-04 13:57:19 +08:00
parent 26742effdd
commit ae1008b4fb
26 changed files with 966 additions and 198 deletions
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27
packages/client/runtime/tests/session-history-source.spec.ts
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@@ -16,7 +16,7 @@ function histResponse(events: SessionEvent[], hasMore = false) {
}
describe('SessionHistorySource', () => {
it('loads every older page without changing a Chat session', async () => {
it('loads the tail first and prepends older pages on demand', async () => {
const pages = [
plainTurn(0, 0, '最早问', '最早答'),
plainTurn(6, 1, '中间问', '中间答'),
@@ -30,7 +30,16 @@ describe('SessionHistorySource', () => {
}
const source = new SessionHistorySource(SID, api)
await source.loadAll()
await source.loadTail()
expect(api.callsOf('session.history')).toHaveLength(1)
expect(source.getSnapshot().hasMore).toBe(true)
expect(source.getSnapshot().inspection.eventNodes.map(node => node.seq))
.toEqual([13, 15])
expect(await source.loadOlder()).toBe(true)
expect(await source.loadOlder()).toBe(true)
expect(await source.loadOlder()).toBe(false)
expect(api.callsOf('session.history')).toHaveLength(3)
expect(source.getSnapshot().hasMore).toBe(false)
@@ -42,7 +51,7 @@ describe('SessionHistorySource', () => {
const api = new FakeApiClient()
api.onHistory = () => histResponse(plainTurn(0, 0, '问', '答'))
const source = new SessionHistorySource(SID, api)
await source.loadAll()
await source.loadTail()
const before = source.getSnapshot()
source.handleMuxFrame({
@@ -60,7 +69,7 @@ describe('SessionHistorySource', () => {
const api = new FakeApiClient()
api.onHistory = () => histResponse(plainTurn(0, 0, '问', '答'))
const source = new SessionHistorySource(SID, api)
await source.loadAll()
await source.loadTail()
const frames: FrameRequestCallback[] = []
vi.stubGlobal('requestAnimationFrame', (callback: FrameRequestCallback) => {
frames.push(callback)
@@ -132,13 +141,14 @@ describe('SessionHistorySource', () => {
}))
const source = new SessionHistorySource(SID, api)
await source.loadAll()
await source.loadTail()
expect(await source.loadOlder()).toBe(false)
expect(api.callsOf('session.history')).toHaveLength(2)
expect(source.getSnapshot().hasMore).toBe(true)
})
it('observes consumer cancellation between older pages', async () => {
it('finishes an already started older page after consumer cancellation', async () => {
const middle = deferred<Awaited<ReturnType<FakeApiClient['onHistory']>>>()
const olderStarted = deferred<undefined>()
const api = new FakeApiClient()
@@ -151,7 +161,8 @@ describe('SessionHistorySource', () => {
}
const source = new SessionHistorySource(SID, api)
const controller = new AbortController()
const complete = source.loadAll(controller.signal)
await source.loadTail(controller.signal)
const complete = source.loadOlder(controller.signal)
await olderStarted.promise
controller.abort()
middle.resolve(ok({
@@ -159,7 +170,7 @@ describe('SessionHistorySource', () => {
hasMore: true,
}))
await complete
expect(await complete).toBe(true)
expect(api.callsOf('session.history')).toHaveLength(2)
expect(source.getSnapshot().hasMore).toBe(true)