test: add route tests for signup, recover, health

src/__tests__/health.test.ts

@@ -0,0 +1,68 @@
+import { describe, it, expect, vi, beforeEach } from "vitest";
+import express from "express";
+import request from "supertest";
+import { getPoolStats } from "../services/browser.js";
+import { pool } from "../services/db.js";
+
+let app: express.Express;
+
+beforeEach(async () => {
+  vi.clearAllMocks();
+
+  // Default: healthy DB
+  const mockClient = {
+    query: vi.fn()
+      .mockResolvedValueOnce({ rows: [{ 1: 1 }] }) // SELECT 1
+      .mockResolvedValueOnce({ rows: [{ version: "PostgreSQL 17.4 on x86_64" }] }), // SELECT version()
+    release: vi.fn(),
+  };
+  vi.mocked(pool.connect).mockResolvedValue(mockClient as any);
+
+  vi.mocked(getPoolStats).mockReturnValue({
+    poolSize: 16,
+    totalPages: 16,
+    availablePages: 14,
+    queueDepth: 0,
+    pdfCount: 5,
+    restarting: false,
+    uptimeMs: 60000,
+    browsers: [],
+  });
+
+  const { healthRouter } = await import("../routes/health.js");
+  app = express();
+  app.use("/health", healthRouter);
+});
+
+describe("GET /health", () => {
+  it("returns 200 with status ok when DB is healthy", async () => {
+    const res = await request(app).get("/health");
+    expect(res.status).toBe(200);
+    expect(res.body.status).toBe("ok");
+    expect(res.body.database.status).toBe("ok");
+  });
+
+  it("returns 503 with status degraded on DB error", async () => {
+    vi.mocked(pool.connect).mockRejectedValue(new Error("Connection refused"));
+    const res = await request(app).get("/health");
+    expect(res.status).toBe(503);
+    expect(res.body.status).toBe("degraded");
+    expect(res.body.database.status).toBe("error");
+  });
+
+  it("includes pool stats", async () => {
+    const res = await request(app).get("/health");
+    expect(res.body.pool).toMatchObject({
+      size: 16,
+      available: 14,
+      queueDepth: 0,
+      pdfCount: 5,
+    });
+  });
+
+  it("includes version", async () => {
+    const res = await request(app).get("/health");
+    expect(res.body.version).toBeDefined();
+    expect(typeof res.body.version).toBe("string");
+  });
+});