t3-code-android-nightly/.repos/alchemy-effect/examples/hetzner-website-nuxt/test/integ.test.ts

import * as Alchemy from "alchemy";
import * as Hetzner from "alchemy/Hetzner";
import * as Test from "alchemy/Test/Bun";
import { expect } from "bun:test";
import * as Console from "effect/Console";
import * as Data from "effect/Data";
import * as Effect from "effect/Effect";
import * as Schedule from "effect/Schedule";
import Stack from "../alchemy.run.ts";

// A fresh Hetzner deployment (and the Hetzner Server behind it) can serve
// transient 404/5xx responses while it propagates. `Test.getWhenReady`
// fails on that cold-start window and retries until the site serves a
// real response.
const { getWhenReady } = Test;

class AssetNotReady extends Data.TaggedError("AssetNotReady")<{
  body: string;
}> {}

// While the asset manifest and Hetzner edge caches are still
// propagating, a 200 body can be stale — the status alone can't
// distinguish "not yet" from "served", so retry until the body matches.
const getBodyWhenReady = (url: string, expected: string) =>
  Effect.gen(function* () {
    const res = yield* getWhenReady(url);
    expect(res.status).toBe(200);
    const body = yield* res.text;
    if (!body.includes(expected)) {
      return yield* Effect.fail(new AssetNotReady({ body }));
    }
    return body;
  }).pipe(
    Effect.retry({
      while: (error) => error instanceof AssetNotReady,
      schedule: Schedule.max([
        Schedule.min([
          Schedule.exponential("500 millis"),
          Schedule.spaced("3 seconds"),
        ]),
        Schedule.recurs(20),
      ]),
    }),
  );

const hasCreds = !!process.env.HCLOUD_TOKEN;

const { test, beforeAll, afterAll, deploy, destroy } = Test.make({
  providers: Hetzner.providers(),
  state: Alchemy.localState(),
  profile: process.env.ALCHEMY_PROFILE,
});

// The first deploy runs the full Nuxt build AND creates a Hetzner
// distribution (~5-10 minutes), so give the hook far more headroom than
// the default 120s.
if (!hasCreds) {
  test.skip("skipped without HCLOUD_TOKEN", Effect.void);
} else {
  const stack = beforeAll(deploy(Stack).pipe(Effect.tap(Console.log)), {
    timeout: 600_000,
  });
  // Deleting the Hetzner deployment takes several minutes too.
  afterAll.skipIf(!!process.env.NO_DESTROY)(destroy(Stack), {
    timeout: 600_000,
  });

  const base = Effect.map(stack, ({ url }) => {
    if (!url) throw new Error("expected the site to expose a url");
    return String(url).replace(/\/+$/, "");
  });

  test(
    "deploys and exposes a url",
    Effect.gen(function* () {
      const { url } = yield* stack;
      expect(url).toBeString();
    }),
    { timeout: 180_000 },
  );

  test(
    "serves the server-rendered home page",
    Effect.gen(function* () {
      const url = yield* base;
      const res = yield* getWhenReady(url);
      expect(res.status).toBe(200);
      const html = yield* res.text;
      expect(html).toContain("Nuxt on Hetzner");
      // The `GREETING` env value from alchemy.run.ts, read via
      // `process.env` during SSR — proves the Hetzner Server rendered it at
      // request time.
      expect(html).toContain("Hello from Nuxt on Hetzner!");
    }),
    { timeout: 180_000 },
  );

  test(
    "serves the api route with the environment value",
    Effect.gen(function* () {
      const url = yield* base;
      const body = yield* getBodyWhenReady(
        `${url}/api/hello`,
        "Hello from Nuxt on Hetzner!",
      );
      expect(JSON.parse(body)).toEqual({
        greeting: "Hello from Nuxt on Hetzner!",
      });
    }),
    { timeout: 180_000 },
  );

  test(
    "serves the prerendered about page",
    Effect.gen(function* () {
      const url = yield* base;
      const res = yield* getWhenReady(`${url}/about`);
      expect(res.status).toBe(200);
    }),
    { timeout: 180_000 },
  );

  test(
    "compiles tailwind from nuxt.config.ts",
    Effect.gen(function* () {
      const url = yield* base;
      // The utility classes on the home page prove the markup made it through
      // the build; the compiled rule proves the @tailwindcss/vite plugin from
      // the project's own nuxt.config.ts ran during it.
      const html = yield* getBodyWhenReady(url, "text-3xl");
      expect(html).toContain("text-3xl");

      // Nuxt either links the compiled stylesheet (/_nuxt/*.css) or inlines it
      // into a <style> tag depending on its inlineStyles feature — accept both.
      const links = [...html.matchAll(/href="([^"]+\.css)"/g)].map(
        (m) => m[1]!,
      );
      let css = [...html.matchAll(/<style[^>]*>([\s\S]*?)<\/style>/g)]
        .map((m) => m[1]!)
        .join("\n");
      for (const link of links) {
        const href = link.startsWith("http") ? link : `${url}${link}`;
        css += yield* getBodyWhenReady(href, "{");
      }
      expect(css).toContain(".text-3xl");
      expect(css).toContain("font-bold");
    }),
    { timeout: 180_000 },
  );

  test(
    "serves a static asset from public/",
    Effect.gen(function* () {
      const url = yield* base;
      const body = yield* getBodyWhenReady(
        `${url}/robots.txt`,
        "User-agent: *",
      );
      expect(body).toContain("User-agent: *");
    }),
    { timeout: 180_000 },
  );
}