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familysync/apps/api/tests/auth/persistSessionCookie.test.ts
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TypeScript

/**
* persistSessionCookie() middleware — unit tests.
*
* Tests the two critical behavioral properties:
* A (persist path): when oidcAuthJwt is set on context, the response includes an
* oidc-auth Set-Cookie with Max-Age, SameSite=Lax, HttpOnly, Secure.
* B (guard path): when oidcAuthJwt is NOT set, no oidc-auth Set-Cookie is emitted
* (the no-resurrection security guard).
*
* Does NOT call @hono/oidc-auth — sets the context variable directly to keep this a
* pure unit test that runs without MariaDB or any external service.
*/
import { describe, it, expect, afterEach } from 'vitest';
import { Hono } from 'hono';
import { persistSessionCookie } from '../../src/auth/persistSessionCookie.js';
// Read the cookie name the same way the implementation does so the test stays correct
// if OIDC_COOKIE_NAME is overridden in the environment.
const COOKIE_NAME = process.env.OIDC_COOKIE_NAME ?? 'oidc-auth';
afterEach(() => {
// Nothing to restore: these tests do not mutate process.env.
});
describe('persistSessionCookie middleware', () => {
describe('Test A — persist path (oidcAuthJwt truthy)', () => {
it('emits an oidc-auth Set-Cookie with Max-Age, SameSite=Lax, HttpOnly, and Secure', async () => {
const app = new Hono();
// Simulate what @hono/oidc-auth does: set a signed session JWT on context.
app.use('/api/*', async (c, next) => {
c.set('oidcAuthJwt' as never, 'header.payload.sig');
await next();
});
app.use('/api/*', persistSessionCookie());
app.get('/api/test', (c) => c.json({ ok: true }));
const res = await app.request('/api/test');
expect(res.status).toBe(200);
const setCookieHeader = res.headers.get('set-cookie');
expect(setCookieHeader).not.toBeNull();
// Cookie name must appear in the Set-Cookie value.
expect(setCookieHeader).toContain(COOKIE_NAME);
// Max-Age must be present (persistent cookie, not session-scoped).
expect(setCookieHeader?.toLowerCase()).toContain('max-age');
// SameSite=Lax must be present.
expect(setCookieHeader?.toLowerCase()).toContain('samesite=lax');
// HttpOnly must be present.
expect(setCookieHeader?.toLowerCase()).toContain('httponly');
// Secure must be present.
expect(setCookieHeader?.toLowerCase()).toContain('secure');
});
it('re-issues the same JWT value the library provided (no re-signing)', async () => {
const dummyJwt = 'header.payload.sig';
const app = new Hono();
app.use('/api/*', async (c, next) => {
c.set('oidcAuthJwt' as never, dummyJwt);
await next();
});
app.use('/api/*', persistSessionCookie());
app.get('/api/test', (c) => c.json({ ok: true }));
const res = await app.request('/api/test');
const setCookieHeader = res.headers.get('set-cookie') ?? '';
// The cookie value must contain the exact JWT string (URL-encoded = is fine but
// the JWT characters must all appear).
expect(setCookieHeader).toContain(dummyJwt);
});
});
describe('Test B — guard path (oidcAuthJwt falsy / absent)', () => {
it('emits NO oidc-auth Set-Cookie when oidcAuthJwt is not set (no resurrection)', async () => {
const app = new Hono();
// Do NOT set oidcAuthJwt — simulates a logged-out or unauthenticated request.
app.use('/api/*', persistSessionCookie());
app.get('/api/test', (c) => c.json({ ok: true }));
const res = await app.request('/api/test');
expect(res.status).toBe(200);
const setCookieHeader = res.headers.get('set-cookie');
// Either no Set-Cookie header at all, or it must not contain the oidc-auth cookie.
const hasOidcCookie = setCookieHeader !== null && setCookieHeader.includes(COOKIE_NAME);
expect(hasOidcCookie).toBe(false);
});
it('emits NO Set-Cookie when oidcAuthJwt is explicitly set to empty string', async () => {
const app = new Hono();
app.use('/api/*', async (c, next) => {
c.set('oidcAuthJwt' as never, '');
await next();
});
app.use('/api/*', persistSessionCookie());
app.get('/api/test', (c) => c.json({ ok: true }));
const res = await app.request('/api/test');
const setCookieHeader = res.headers.get('set-cookie');
const hasOidcCookie = setCookieHeader !== null && setCookieHeader.includes(COOKIE_NAME);
expect(hasOidcCookie).toBe(false);
});
});
});