👷(packaged) Move to Vitest (#5348)

**Description**

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Change our test runner to Vitest.

Jest is great but it's partial support for ESM is putting us in
troubles. As such we passed fast-check to Vitest a while ago and want to
unify all others so that we preserve a unique test runner in our CI.

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- [x] Category: 👷 Build tools & CI
- [x] Impacts: Test runner

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.changeset/chilled-peas-cheat.md

@@ -0,0 +1,5 @@
+---
+"@fast-check/packaged": patch
+---
+
+👷(packaged) Move to Vitest

packages/packaged/package.json

@@ -16,7 +16,7 @@
     "build-ci": "yarn build",
     "build:publish-types": "tsc -p tsconfig.publish.types.json",
     "build:publish-esm": "tsc -p tsconfig.publish.json --module es2015 --moduleResolution node",
-    "test": "yarn node --experimental-vm-modules $(yarn bin jest) --verbose",
+    "test": "vitest",
     "typecheck": "tsc --noEmit"
   },
   "repository": {
@@ -38,14 +38,10 @@
     "npm-packlist": "^9.0.0"
   },
   "devDependencies": {
-    "@babel/core": "^7.25.8",
-    "@babel/preset-typescript": "^7.25.7",
-    "@types/jest": "^29.5.13",
     "@types/npm-packlist": "^7.0.3",
     "@types/npmcli__arborist": "^5.6.11",
-    "babel-jest": "^29.7.0",
-    "jest": "^29.7.0",
-    "typescript": "~5.6.3"
+    "typescript": "~5.6.3",
+    "vitest": "^2.1.3"
   },
   "keywords": [],
   "funding": [

packages/packaged/test/packaged.spec.ts

@@ -1,10 +1,16 @@
+import { describe, it, expect, afterAll } from 'vitest';
 import { promises as fs } from 'fs';
 import * as path from 'path';
 import * as url from 'url';
 import { removeNonPublishedFiles } from '../src/packaged';
 
 // @ts-expect-error --module must be higher
 const __dirname = url.fileURLToPath(new URL('.', import.meta.url));
+const testDirname = path.join(__dirname, '..', '.test-artifacts');
+
+afterAll(async () => {
+  await fs.rmdir(testDirname);
+});
 
 describe('removeNonPublishedFiles', () => {
   it.each`
@@ -262,7 +268,7 @@ type RunnerFileSystem = {
 async function runPackageTest(runner: (fileSystem: RunnerFileSystem) => Promise<void>): Promise<void> {
   const initialWorkingDirectory = process.cwd();
   const packageName = `random-package-${Date.now().toString(16)}-${Math.random().toString(16).substring(2)}`;
-  const packagePath = path.join(__dirname, packageName);
+  const packagePath = path.join(testDirname, packageName);
   try {
     const fileSystem: RunnerFileSystem = {
       packagePath,

packages/packaged/vitest.config.ts

@@ -0,0 +1,7 @@
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    include: ['**/test/*.{test,spec}.?(c|m)[jt]s?(x)'],
+  },
+});

yarn.lock

@@ -3076,16 +3076,12 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "@fast-check/packaged@workspace:packages/packaged"
   dependencies:
-    "@babel/core": "npm:^7.25.8"
-    "@babel/preset-typescript": "npm:^7.25.7"
     "@npmcli/arborist": "npm:^8.0.0"
-    "@types/jest": "npm:^29.5.13"
     "@types/npm-packlist": "npm:^7.0.3"
     "@types/npmcli__arborist": "npm:^5.6.11"
-    babel-jest: "npm:^29.7.0"
-    jest: "npm:^29.7.0"
     npm-packlist: "npm:^9.0.0"
     typescript: "npm:~5.6.3"
+    vitest: "npm:^2.1.3"
   bin:
     packaged: ./bin/packaged.js
   languageName: unknown