phaseflow/e2e/health.spec.ts

// ABOUTME: E2E tests for health and observability endpoints.
// ABOUTME: Tests health check endpoint response and performance.
import { expect, test } from "@playwright/test";

test.describe("health and observability", () => {
  test.describe("health endpoint", () => {
    test("health endpoint returns 200 when healthy", async ({ request }) => {
      const response = await request.get("/api/health");

      expect(response.status()).toBe(200);

      const body = await response.json();
      expect(body.status).toBe("ok");
      expect(body).toHaveProperty("timestamp");
      expect(body).toHaveProperty("version");
    });

    test("health endpoint responds quickly", async ({ request }) => {
      const startTime = Date.now();
      const response = await request.get("/api/health");
      const endTime = Date.now();

      expect(response.status()).toBe(200);
      // E2E includes network latency; allow 500ms for full round-trip
      // (the handler itself executes in <100ms per spec)
      expect(endTime - startTime).toBeLessThan(500);
    });
  });

  test.describe("metrics endpoint", () => {
    test("metrics endpoint is accessible and returns Prometheus format", async ({
      request,
    }) => {
      const response = await request.get("/api/metrics");

      expect(response.status()).toBe(200);

      const contentType = response.headers()["content-type"];
      expect(contentType).toContain("text/plain");

      const body = await response.text();
      // Prometheus format should contain HELP and TYPE comments
      expect(body).toMatch(/^# HELP/m);
      expect(body).toMatch(/^# TYPE/m);
      // Should contain our custom metrics
      expect(body).toContain("phaseflow_");
    });
  });
});