moviedice/src/__tests__/integration/realtime-smoke.test.ts

// @vitest-environment node
/**
 * Smoke test: a hand-minted HS256 JWT (mintAccessToken) is accepted by
 * PostgREST. RLS resolves `auth.uid()` to the JWT's `sub` and returns
 * exactly the rows that user is allowed to see.
 *
 * Gated on RUN_INTEGRATION=1; skipped otherwise.
 *
 * We test PostgREST rather than Realtime directly because:
 *   - Realtime accepts the same JWT via the same HS256 verification path,
 *     so PostgREST acceptance proves the load-bearing claim.
 *   - The Realtime ws client adds harness complexity disproportionate to
 *     the assertion.
 */
import { describe, it, expect } from "vitest";
import { createClient } from "@supabase/supabase-js";
import { randomUUID } from "node:crypto";

const RUN = process.env.RUN_INTEGRATION === "1";
const SUPABASE_URL = process.env.NEXT_PUBLIC_SUPABASE_URL ?? "";
const SUPABASE_ANON = process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY ?? "";
const SUPABASE_SERVICE = process.env.SUPABASE_SERVICE_ROLE_KEY ?? "";

(RUN ? describe : describe.skip)("integration: minted JWT accepted by PostgREST", () => {
  it("a JWT signed with JWT_SECRET resolves auth.uid() under RLS", async () => {
    expect(process.env.JWT_SECRET).toBeTruthy();

    // Sign an anon user up (real auth.users row required for FKs / RLS).
    const anon = createClient(SUPABASE_URL, SUPABASE_ANON, {
      auth: { persistSession: false, autoRefreshToken: false },
    });
    const { data: signin } = await anon.auth.signInAnonymously();
    const uid = signin.user!.id;

    // Persist a session row so isSessionLive() would pass — not strictly
    // required for PostgREST but matches the production token shape.
    const admin = createClient(SUPABASE_URL, SUPABASE_SERVICE, {
      auth: { persistSession: false, autoRefreshToken: false },
    });
    await admin.from("user_sessions").insert({ user_id: uid, id: randomUUID() });

    const { mintAccessToken } = await import("@/lib/auth/jwt");
    const token = await mintAccessToken({
      sub: uid,
      session_id: randomUUID(),
      iat_original: Math.floor(Date.now() / 1000),
    });

    // Construct an anon client and inject our minted token. PostgREST will
    // verify the HS256 signature and resolve auth.uid() = uid for RLS.
    const minted = createClient(SUPABASE_URL, SUPABASE_ANON, {
      auth: { persistSession: false, autoRefreshToken: false },
      global: { headers: { Authorization: `Bearer ${token}` } },
    });

    // Read the user's own row (RLS allows: auth.uid() = id).
    const { data, error } = await minted.from("users").select("id").eq("id", uid).maybeSingle();
    expect(error).toBeNull();
    expect(data?.id).toBe(uid);
  }, 30_000);
});