Files
backspace/packages/server/src/utils/federationEpoch.test.ts
T

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TypeScript

import { describe, it, expect, beforeEach, vi } from 'vitest';
import Database from 'better-sqlite3';
import { drizzle } from 'drizzle-orm/better-sqlite3';
import fs from 'node:fs';
import path from 'node:path';
import { fileURLToPath } from 'node:url';
import * as schema from '../db/schema.js';
const __dirname = path.dirname(fileURLToPath(import.meta.url));
let sqlite: Database.Database;
let testDb: ReturnType<typeof drizzle<typeof schema>>;
vi.mock('../db/index.js', () => ({
getDb: () => testDb,
getRawDb: () => sqlite,
schema,
}));
function applyMigrations(db: Database.Database): void {
const dir = path.resolve(__dirname, '../../drizzle');
for (const f of fs.readdirSync(dir).filter(f => f.endsWith('.sql')).sort()) {
const sqlText = fs.readFileSync(path.join(dir, f), 'utf8');
for (const stmt of sqlText.split(/-->\s*statement-breakpoint/)) {
const clean = stmt.trim();
if (clean) db.exec(clean);
}
}
}
function seedEpoch(instanceId: string): void {
testDb.insert(schema.instanceSettings).values({
id: 1,
instanceId,
updatedAt: Date.now(),
} as typeof schema.instanceSettings.$inferInsert).run();
}
beforeEach(async () => {
sqlite = new Database(':memory:');
testDb = drizzle(sqlite, { schema });
applyMigrations(sqlite);
const { __resetInstanceIdCacheForTest } = await import('./federationEpoch.js');
__resetInstanceIdCacheForTest();
});
describe('getInstanceId', () => {
it('returns the persisted epoch', async () => {
seedEpoch('123e4567-e89b-12d3-a456-426614174000');
const { getInstanceId } = await import('./federationEpoch.js');
const id = getInstanceId();
expect(id).toBe('123e4567-e89b-12d3-a456-426614174000');
expect(id).toMatch(/^[0-9a-f-]{36}$/);
});
it('caches the value after the first read', async () => {
seedEpoch('123e4567-e89b-12d3-a456-426614174000');
const { getInstanceId } = await import('./federationEpoch.js');
expect(getInstanceId()).toBe('123e4567-e89b-12d3-a456-426614174000');
// Mutate the underlying row; a cached reader must NOT observe the change.
testDb.update(schema.instanceSettings)
.set({ instanceId: 'ffffffff-ffff-ffff-ffff-ffffffffffff' })
.run();
expect(getInstanceId()).toBe('123e4567-e89b-12d3-a456-426614174000');
});
it('re-reads after __resetInstanceIdCacheForTest clears the cache', async () => {
seedEpoch('123e4567-e89b-12d3-a456-426614174000');
const { getInstanceId, __resetInstanceIdCacheForTest } = await import('./federationEpoch.js');
expect(getInstanceId()).toBe('123e4567-e89b-12d3-a456-426614174000');
testDb.update(schema.instanceSettings)
.set({ instanceId: 'ffffffff-ffff-ffff-ffff-ffffffffffff' })
.run();
__resetInstanceIdCacheForTest();
expect(getInstanceId()).toBe('ffffffff-ffff-ffff-ffff-ffffffffffff');
});
it('throws when the epoch is unset (invariant: ensureDefaults must run first)', async () => {
// No row seeded — instance_settings is empty.
const { getInstanceId } = await import('./federationEpoch.js');
expect(() => getInstanceId()).toThrow(/instance_id is not set/);
});
});