fix(backend): fallback if sinceId is older than the oldest in cache when using FTT (#14061)

* fix(backend): fallback if `sinceId` is older than the oldest in cache when using FTT

* Update CHANGELOG.md

* chore: fix description of test

packages/backend/test/e2e/timelines.ts

@@ -7,6 +7,8 @@
 // pnpm jest -- e2e/timelines.ts
 
 import * as assert from 'assert';
+import { Redis } from 'ioredis';
+import { loadConfig } from '@/config.js';
 import { api, post, randomString, sendEnvUpdateRequest, signup, sleep, uploadUrl } from '../utils.js';
 
 function genHost() {
@@ -17,7 +19,13 @@ function waitForPushToTl() {
 	return sleep(500);
 }
 
+let redisForTimelines: Redis;
+
 describe('Timelines', () => {
+	beforeAll(() => {
+		redisForTimelines = new Redis(loadConfig().redisForTimelines);
+	});
+
 	describe('Home TL', () => {
 		test.concurrent('自分の visibility: followers なノートが含まれる', async () => {
 			const [alice] = await Promise.all([signup()]);
@@ -1272,6 +1280,33 @@ describe('Timelines', () => {
 
 			assert.strictEqual(res.body.some((note: any) => note.id === bobNote.id), false);
 		});
+
+		/** @see https://github.com/misskey-dev/misskey/issues/14000 */
+		test.concurrent('FTT: sinceId にキャッシュより古いノートを指定しても、sinceId による絞り込みが正しく動作する', async () => {
+			const alice = await signup();
+			const noteSince = await post(alice, { text: 'Note where id will be `sinceId`.' });
+			const note1 = await post(alice, { text: '1' });
+			const note2 = await post(alice, { text: '2' });
+			await redisForTimelines.del('list:userTimeline:' + alice.id);
+			const note3 = await post(alice, { text: '3' });
+
+			const res = await api('users/notes', { userId: alice.id, sinceId: noteSince.id });
+			assert.deepStrictEqual(res.body, [note1, note2, note3]);
+		});
+
+		test.concurrent('FTT: sinceId にキャッシュより古いノートを指定しても、sinceId と untilId による絞り込みが正しく動作する', async () => {
+			const alice = await signup();
+			const noteSince = await post(alice, { text: 'Note where id will be `sinceId`.' });
+			const note1 = await post(alice, { text: '1' });
+			const note2 = await post(alice, { text: '2' });
+			await redisForTimelines.del('list:userTimeline:' + alice.id);
+			const note3 = await post(alice, { text: '3' });
+			const noteUntil = await post(alice, { text: 'Note where id will be `untilId`.' });
+			await post(alice, { text: '4' });
+
+			const res = await api('users/notes', { userId: alice.id, sinceId: noteSince.id, untilId: noteUntil.id });
+			assert.deepStrictEqual(res.body, [note3, note2, note1]);
+		});
 	});
 
 	// TODO: リノートミュート済みユーザーのテスト