feat(memory): implement keyword search adapter — no vector dependency
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
298
packages/memory/src/adapters/keyword.test.ts
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298
packages/memory/src/adapters/keyword.test.ts
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import { describe, it, expect, beforeEach } from 'vitest';
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import type { StorageAdapter } from '@mosaic/storage';
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import { KeywordAdapter } from './keyword.js';
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/* ------------------------------------------------------------------ */
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/* In-memory mock StorageAdapter */
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/* ------------------------------------------------------------------ */
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function createMockStorage(): StorageAdapter {
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const collections = new Map<string, Map<string, Record<string, unknown>>>();
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let idCounter = 0;
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function getCollection(name: string): Map<string, Record<string, unknown>> {
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if (!collections.has(name)) collections.set(name, new Map());
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return collections.get(name)!;
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}
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const adapter: StorageAdapter = {
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name: 'mock',
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async create<T extends Record<string, unknown>>(
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collection: string,
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data: T,
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): Promise<T & { id: string }> {
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const id = String(++idCounter);
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const record = { ...data, id };
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getCollection(collection).set(id, record);
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return record as T & { id: string };
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},
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async read<T extends Record<string, unknown>>(
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collection: string,
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id: string,
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): Promise<T | null> {
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const record = getCollection(collection).get(id);
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return (record as T) ?? null;
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},
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async update(collection: string, id: string, data: Record<string, unknown>): Promise<boolean> {
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const col = getCollection(collection);
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const existing = col.get(id);
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if (!existing) return false;
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col.set(id, { ...existing, ...data });
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return true;
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},
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async delete(collection: string, id: string): Promise<boolean> {
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return getCollection(collection).delete(id);
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},
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async find<T extends Record<string, unknown>>(
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collection: string,
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filter?: Record<string, unknown>,
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): Promise<T[]> {
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const col = getCollection(collection);
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const results: T[] = [];
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for (const record of col.values()) {
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if (filter && !matchesFilter(record, filter)) continue;
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results.push(record as T);
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}
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return results;
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},
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async findOne<T extends Record<string, unknown>>(
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collection: string,
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filter: Record<string, unknown>,
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): Promise<T | null> {
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const col = getCollection(collection);
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for (const record of col.values()) {
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if (matchesFilter(record, filter)) return record as T;
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}
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return null;
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},
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async count(collection: string, filter?: Record<string, unknown>): Promise<number> {
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const rows = await adapter.find(collection, filter);
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return rows.length;
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},
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async transaction<T>(fn: (tx: StorageAdapter) => Promise<T>): Promise<T> {
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return fn(adapter);
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},
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async migrate(): Promise<void> {},
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async close(): Promise<void> {},
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};
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return adapter;
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}
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function matchesFilter(record: Record<string, unknown>, filter: Record<string, unknown>): boolean {
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for (const [key, value] of Object.entries(filter)) {
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if (record[key] !== value) return false;
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}
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return true;
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}
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/* ------------------------------------------------------------------ */
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/* Tests */
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/* ------------------------------------------------------------------ */
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describe('KeywordAdapter', () => {
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let adapter: KeywordAdapter;
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beforeEach(() => {
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adapter = new KeywordAdapter({ type: 'keyword', storage: createMockStorage() });
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});
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/* ---- Preferences ---- */
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describe('preferences', () => {
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it('should set and get a preference', async () => {
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await adapter.setPreference('u1', 'theme', 'dark');
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const value = await adapter.getPreference('u1', 'theme');
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expect(value).toBe('dark');
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});
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it('should return null for missing preference', async () => {
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const value = await adapter.getPreference('u1', 'nonexistent');
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expect(value).toBeNull();
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});
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it('should upsert an existing preference', async () => {
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await adapter.setPreference('u1', 'theme', 'dark');
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await adapter.setPreference('u1', 'theme', 'light');
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const value = await adapter.getPreference('u1', 'theme');
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expect(value).toBe('light');
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});
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it('should delete a preference', async () => {
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await adapter.setPreference('u1', 'theme', 'dark');
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const deleted = await adapter.deletePreference('u1', 'theme');
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expect(deleted).toBe(true);
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const value = await adapter.getPreference('u1', 'theme');
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expect(value).toBeNull();
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});
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it('should return false when deleting nonexistent preference', async () => {
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const deleted = await adapter.deletePreference('u1', 'nope');
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expect(deleted).toBe(false);
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});
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it('should list preferences by userId', async () => {
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await adapter.setPreference('u1', 'theme', 'dark', 'appearance');
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await adapter.setPreference('u1', 'lang', 'en', 'locale');
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await adapter.setPreference('u2', 'theme', 'light', 'appearance');
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const prefs = await adapter.listPreferences('u1');
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expect(prefs).toHaveLength(2);
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expect(prefs.map((p) => p.key).sort()).toEqual(['lang', 'theme']);
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});
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it('should filter preferences by category', async () => {
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await adapter.setPreference('u1', 'theme', 'dark', 'appearance');
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await adapter.setPreference('u1', 'lang', 'en', 'locale');
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const prefs = await adapter.listPreferences('u1', 'appearance');
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expect(prefs).toHaveLength(1);
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expect(prefs[0]!.key).toBe('theme');
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});
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});
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/* ---- Insights ---- */
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describe('insights', () => {
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it('should store and retrieve an insight', async () => {
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const insight = await adapter.storeInsight({
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userId: 'u1',
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content: 'TypeScript is great for type safety',
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source: 'chat',
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category: 'technical',
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relevanceScore: 0.9,
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});
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expect(insight.id).toBeDefined();
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expect(insight.content).toBe('TypeScript is great for type safety');
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const fetched = await adapter.getInsight(insight.id);
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expect(fetched).not.toBeNull();
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expect(fetched!.content).toBe('TypeScript is great for type safety');
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});
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it('should return null for missing insight', async () => {
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const result = await adapter.getInsight('nonexistent');
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expect(result).toBeNull();
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});
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it('should delete an insight', async () => {
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const insight = await adapter.storeInsight({
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userId: 'u1',
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content: 'test',
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source: 'chat',
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category: 'general',
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relevanceScore: 0.5,
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});
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const deleted = await adapter.deleteInsight(insight.id);
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expect(deleted).toBe(true);
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const fetched = await adapter.getInsight(insight.id);
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expect(fetched).toBeNull();
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});
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});
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/* ---- Keyword Search ---- */
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describe('searchInsights', () => {
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beforeEach(async () => {
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await adapter.storeInsight({
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userId: 'u1',
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content: 'TypeScript provides excellent type safety for JavaScript projects',
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source: 'chat',
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category: 'technical',
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relevanceScore: 0.9,
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});
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await adapter.storeInsight({
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userId: 'u1',
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content: 'React hooks simplify state management in components',
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source: 'chat',
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category: 'technical',
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relevanceScore: 0.8,
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});
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await adapter.storeInsight({
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userId: 'u1',
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content: 'TypeScript and React work great together for type safe components',
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source: 'chat',
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category: 'technical',
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relevanceScore: 0.85,
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});
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await adapter.storeInsight({
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userId: 'u2',
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content: 'TypeScript is popular',
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source: 'chat',
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category: 'general',
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relevanceScore: 0.5,
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});
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});
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it('should find insights by exact keyword', async () => {
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const results = await adapter.searchInsights('u1', 'hooks');
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expect(results).toHaveLength(1);
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expect(results[0]!.content).toContain('hooks');
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});
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it('should be case-insensitive', async () => {
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const results = await adapter.searchInsights('u1', 'TYPESCRIPT');
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expect(results.length).toBeGreaterThanOrEqual(1);
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for (const r of results) {
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expect(r.content.toLowerCase()).toContain('typescript');
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}
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});
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it('should rank multi-word matches higher', async () => {
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const results = await adapter.searchInsights('u1', 'TypeScript React');
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// The insight mentioning both "TypeScript" and "React" should rank first (score=2)
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expect(results[0]!.score).toBe(2);
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expect(results[0]!.content).toContain('TypeScript');
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expect(results[0]!.content).toContain('React');
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});
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it('should return empty for no matches', async () => {
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const results = await adapter.searchInsights('u1', 'python django');
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expect(results).toHaveLength(0);
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});
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it('should filter by userId', async () => {
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const results = await adapter.searchInsights('u2', 'TypeScript');
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expect(results).toHaveLength(1);
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expect(results[0]!.content).toBe('TypeScript is popular');
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});
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it('should respect limit option', async () => {
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const results = await adapter.searchInsights('u1', 'TypeScript', { limit: 1 });
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expect(results).toHaveLength(1);
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});
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it('should return empty for empty query', async () => {
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const results = await adapter.searchInsights('u1', ' ');
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expect(results).toHaveLength(0);
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});
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});
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/* ---- Lifecycle ---- */
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describe('lifecycle', () => {
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it('should have name "keyword"', () => {
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expect(adapter.name).toBe('keyword');
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});
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it('should have null embedder', () => {
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expect(adapter.embedder).toBeNull();
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});
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it('should close without error', async () => {
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await expect(adapter.close()).resolves.toBeUndefined();
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});
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});
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});
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