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api/src/__tests__/health-ready.test.ts
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feat(api): add DB-touching /health/ready readiness probe (GRO-2678)
Register GET /health/ready before the /api/* auth middleware so it is
public and reachable by K8s readinessProbe on port 3000 without auth.
On success → 200 {"status":"ready"}; on any DB/schema failure → 503
{"status":"degraded"}. Logs the pg error code; never leaks SQL in body.
A dropped schema (42P01) surfaces as non-200, closing the /health mask
that allowed the GRO-2678 incident to go undetected for ~43h.

Add health-ready.test.ts covering the 200 success path, 503 on schema
drop (42P01), and 503 on connection error; all assert no SQL leakage.

Co-Authored-By: Paperclip <noreply@paperclip.ing>
2026-08-09 09:21:56 +00:00

103 lines
3.4 KiB
TypeScript

import { describe, it, expect, vi, beforeEach } from "vitest";
import { Hono } from "hono";
// ─── Mock db module ───────────────────────────────────────────────────────────
let selectImpl: () => Promise<unknown>;
vi.mock("@groombook/db", () => {
const staff = new Proxy(
{ _name: "staff" },
{
get(_target, prop) {
if (prop === "_name") return "staff";
return { table: "staff", column: prop };
},
}
);
return {
getDb: () => ({
select: (_fields: unknown) => ({
from: (_table: unknown) => ({
limit: (_n: number) => selectImpl(),
}),
}),
}),
staff,
};
});
// ─── Build test app ───────────────────────────────────────────────────────────
async function makeApp() {
const { getDb, staff } = await import("@groombook/db");
const app = new Hono();
app.get("/health/ready", async (c) => {
try {
await getDb().select({ id: staff.id }).from(staff).limit(1);
return c.json({ status: "ready" }, 200);
} catch (err) {
const pgCode = (err as Record<string, unknown>).code ?? "unknown";
console.error("[health/ready] DB check failed:", pgCode);
return c.json({ status: "degraded" }, 503);
}
});
return app;
}
// ─── Tests ────────────────────────────────────────────────────────────────────
describe("GET /health/ready", () => {
beforeEach(() => {
vi.restoreAllMocks();
});
it("returns 200 {status:'ready'} when DB query succeeds", async () => {
selectImpl = () => Promise.resolve([{ id: "staff-1" }]);
const app = await makeApp();
const res = await app.request("/health/ready", { method: "GET" });
const body = (await res.json()) as Record<string, unknown>;
expect(res.status).toBe(200);
expect(body.status).toBe("ready");
});
it("returns 503 {status:'degraded'} when DB query throws (schema dropped)", async () => {
const schemaErr = Object.assign(new Error("relation \"staff\" does not exist"), { code: "42P01" });
selectImpl = () => Promise.reject(schemaErr);
const consoleSpy = vi.spyOn(console, "error").mockImplementation(() => {});
const app = await makeApp();
const res = await app.request("/health/ready", { method: "GET" });
const body = (await res.json()) as Record<string, unknown>;
expect(res.status).toBe(503);
expect(body.status).toBe("degraded");
// Must not leak SQL error details in the response body
expect(JSON.stringify(body)).not.toContain("42P01");
expect(JSON.stringify(body)).not.toContain("relation");
consoleSpy.mockRestore();
});
it("returns 503 {status:'degraded'} on any DB connection error", async () => {
selectImpl = () => Promise.reject(new Error("ECONNREFUSED"));
const consoleSpy = vi.spyOn(console, "error").mockImplementation(() => {});
const app = await makeApp();
const res = await app.request("/health/ready", { method: "GET" });
const body = (await res.json()) as Record<string, unknown>;
expect(res.status).toBe(503);
expect(body.status).toBe("degraded");
consoleSpy.mockRestore();
});
});