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test: cache dockerfile fixture reads

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This commit is contained in:
Peter Steinberger
2026-04-27 12:42:26 +01:00
parent 9be54044eb
commit d25dd7c2bd
1 changed files with 35 additions and 21 deletions
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56
src/docker-build-cache.test.ts
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@@ -1,12 +1,39 @@
import { readFile } from "node:fs/promises";
import { resolve } from "node:path";
import { fileURLToPath } from "node:url";
import { describe, expect, it } from "vitest";
import { beforeAll, describe, expect, it } from "vitest";
const repoRoot = resolve(fileURLToPath(new URL(".", import.meta.url)), "..");
const dockerfilePaths = [
"Dockerfile",
"Dockerfile.sandbox",
"Dockerfile.sandbox-browser",
"Dockerfile.sandbox-common",
"scripts/docker/cleanup-smoke/Dockerfile",
"scripts/docker/install-sh-smoke/Dockerfile",
"scripts/docker/install-sh-e2e/Dockerfile",
"scripts/docker/install-sh-nonroot/Dockerfile",
"scripts/e2e/Dockerfile",
"scripts/e2e/Dockerfile.qr-import",
] as const;
const aptCacheDockerfilePaths = dockerfilePaths.filter(
(path) => path !== "scripts/e2e/Dockerfile.qr-import" && path !== "scripts/e2e/Dockerfile",
);
const shellContinuationDockerfilePaths = dockerfilePaths.filter(
(path) =>
path !== "Dockerfile" &&
path !== "scripts/e2e/Dockerfile" &&
path !== "scripts/e2e/Dockerfile.qr-import",
);
const repoFileCache = new Map<string, Promise<string>>();
async function readRepoFile(path: string): Promise<string> {
return readFile(resolve(repoRoot, path), "utf8");
let cached = repoFileCache.get(path);
if (!cached) {
cached = readFile(resolve(repoRoot, path), "utf8");
repoFileCache.set(path, cached);
}
return cached;
}
function indexOfPattern(source: string, pattern: RegExp): number {
@@ -14,6 +41,10 @@ function indexOfPattern(source: string, pattern: RegExp): number {
}
describe("docker build cache layout", () => {
beforeAll(async () => {
await Promise.all(dockerfilePaths.map((path) => readRepoFile(path)));
});
it("keeps the root dependency layer independent from scripts changes", async () => {
const dockerfile = await readRepoFile("Dockerfile");
const installIndex = dockerfile.indexOf("pnpm install --frozen-lockfile");
@@ -42,16 +73,7 @@ describe("docker build cache layout", () => {
});
it("uses apt cache mounts in Dockerfiles that install system packages", async () => {
for (const path of [
"Dockerfile",
"Dockerfile.sandbox",
"Dockerfile.sandbox-browser",
"Dockerfile.sandbox-common",
"scripts/docker/cleanup-smoke/Dockerfile",
"scripts/docker/install-sh-smoke/Dockerfile",
"scripts/docker/install-sh-e2e/Dockerfile",
"scripts/docker/install-sh-nonroot/Dockerfile",
]) {
for (const path of aptCacheDockerfilePaths) {
const dockerfile = await readRepoFile(path);
expect(dockerfile, `${path} should cache apt package archives`).toContain(
"target=/var/cache/apt,sharing=locked",
@@ -71,15 +93,7 @@ describe("docker build cache layout", () => {
});
it("does not leave blank lines after shell continuation markers", async () => {
for (const path of [
"Dockerfile.sandbox",
"Dockerfile.sandbox-browser",
"Dockerfile.sandbox-common",
"scripts/docker/cleanup-smoke/Dockerfile",
"scripts/docker/install-sh-smoke/Dockerfile",
"scripts/docker/install-sh-e2e/Dockerfile",
"scripts/docker/install-sh-nonroot/Dockerfile",
]) {
for (const path of shellContinuationDockerfilePaths) {
const dockerfile = await readRepoFile(path);
expect(
dockerfile,