1import * as Alchemy from "alchemy";
2import * as GCP from "alchemy/GCP";
3import * as Test from "alchemy/Test/Bun";
4import { describe, expect } from "bun:test";
5import * as Console from "effect/Console";
6import * as Data from "effect/Data";
7import * as Effect from "effect/Effect";
8import * as Schedule from "effect/Schedule";
9import { spawnSync } from "node:child_process";
10import Stack from "../alchemy.run.ts";
11
12// A fresh Cloud Run revision can answer transient 404/5xx responses while
13// its URL starts serving. `Test.getWhenReady` retries through that
14// cold-start window until the site serves a real response.
15const { getWhenReady } = Test;
16
17class AssetNotReady extends Data.TaggedError("AssetNotReady")<{
18 body: string;
19}> {}
20
21// Retry until the body matches — the status alone can't distinguish a
22// cold start from a served page.
23const getBodyWhenReady = (url: string, expected: string) =>
24 Effect.gen(function* () {
25 const res = yield* getWhenReady(url);
26 expect(res.status).toBe(200);
27 const body = yield* res.text;
28 if (!body.includes(expected)) {
29 return yield* Effect.fail(new AssetNotReady({ body }));
30 }
31 return body;
32 }).pipe(
33 Effect.retry({
34 while: (error) => error instanceof AssetNotReady,
35 schedule: Schedule.max([
36 Schedule.min([
37 Schedule.exponential("500 millis"),
38 Schedule.spaced("3 seconds"),
39 ]),
40 Schedule.recurs(20),
41 ]),
42 }),
43 );
44
45const { test, beforeAll, afterAll, deploy, destroy } = Test.make({
46 providers: GCP.providers(),
47 state: Alchemy.localState(),
48});
49
50// The image is built locally, so the whole suite needs Docker.
51const dockerAvailable =
52 spawnSync("docker", ["info"], { stdio: "ignore", timeout: 15_000 }).status ===
53 0;
54
55describe.skipIf(!dockerAvailable)("gcp-website-nextjs", () => {
56 // The first deploy runs `next build`, builds and pushes the image
57 // (installing `next` into it), and rolls out Cloud Run.
58 const stack = beforeAll(deploy(Stack).pipe(Effect.tap(Console.log)), {
59 timeout: 1_200_000,
60 });
61 afterAll.skipIf(!!process.env.NO_DESTROY)(destroy(Stack), {
62 timeout: 600_000,
63 });
64
65 const base = Effect.map(stack, ({ url }) => {
66 if (!url) throw new Error("expected the site to expose a Cloud Run url");
67 return String(url).replace(/\/+$/, "");
68 });
69
70 test(
71 "deploys and exposes a Cloud Run url",
72 Effect.gen(function* () {
73 const { url } = yield* stack;
74 expect(String(url)).toMatch(/^https:\/\/.+\.run\.app\/?$/);
75 }),
76 { timeout: 180_000 },
77 );
78
79 test(
80 "serves the server-rendered home page",
81 Effect.gen(function* () {
82 const url = yield* base;
83 const html = yield* getBodyWhenReady(url, "Next.js on Cloud Run");
84 // The `GREETING` env value from alchemy.run.ts, read via
85 // `process.env` in the force-dynamic page — proves the container
86 // rendered it at request time.
87 expect(html).toContain("Hello from Next.js on Cloud Run!");
88 }),
89 { timeout: 180_000 },
90 );
91
92 test(
93 "serves the dynamic API route",
94 Effect.gen(function* () {
95 const url = yield* base;
96 const res = yield* getWhenReady(`${url}/api/hello`);
97 expect(res.status).toBe(200);
98 const body = (yield* res.json) as { hello: string };
99 expect(body.hello).toBe("world");
100 }),
101 { timeout: 180_000 },
102 );
103
104 test(
105 "compiles tailwind via postcss",
106 Effect.gen(function* () {
107 const url = yield* base;
108 // The page markup uses Tailwind utilities — proving the project's own
109 // postcss.config.mjs (@tailwindcss/postcss) ran inside `next build`.
110 const html = yield* getBodyWhenReady(url, "text-3xl");
111 const match = html.match(/\/_next\/static\/[^"']+\.css/);
112 expect(match).not.toBeNull();
113 const css = yield* getBodyWhenReady(`${url}${match![0]}`, ".text-3xl");
114 expect(css).toContain(".font-bold");
115 }),
116 { timeout: 180_000 },
117 );
118
119 test(
120 "serves a static asset from public/",
121 Effect.gen(function* () {
122 const url = yield* base;
123 const body = yield* getBodyWhenReady(
124 `${url}/robots.txt`,
125 "User-agent: *",
126 );
127 expect(body).toContain("User-agent: *");
128 }),
129 { timeout: 180_000 },
130 );
131});