refactor: replace jest with node built-in test runner

package.json

@@ -14,8 +14,7 @@
   "scripts": {
     "clean": "tsc --build --clean",
     "build": "tsc --build --verbose --listEmittedFiles",
-    "pretest:unit": "tsc --build test --verbose --listEmittedFiles",
-    "test:unit": "node --experimental-vm-modules node_modules/jest/bin/jest.js",
+    "test:unit": "node --test test/test.js test/e2e.test.js",
     "test": "pnpm run build && pnpm run test:unit",
     "prepublishOnly": "pnpm run build"
   },
@@ -34,19 +33,13 @@
     "cmd-extension": "^1.0.2"
   },
   "devDependencies": {
-    "@types/jest": "^29.5.14",
     "@types/node": "^18.19.87",
-    "jest": "^29.7.0",
     "memfs": "^3.5.3",
     "tempy": "^1.0.1",
     "typescript": "^4.9.5"
   },
   "engines": {
     "node": ">=22.13"
   },
-  "jest": {
-    "testEnvironment": "node",
-    "transform": {}
-  },
   "packageManager": "pnpm@11.0.0-beta.2"
 }

test/e2e.test.js

@@ -1,16 +1,24 @@
 import fs from 'node:fs'
 import path from 'node:path'
+import { describe, test, snapshot } from 'node:test'
+import assert from 'node:assert/strict'
+
+snapshot.setDefaultSnapshotSerializers([
+  (value) => typeof value === 'string' ? `\n${value.replaceAll('\r', '')}` : JSON.stringify(value),
+])
 import tempy from 'tempy'
 import { cmdShim } from '../index.js'
 
-const testOnWindows = process.platform === 'win32' ? test : test.skip
+const describeOnWindows = process.platform === 'win32' ? describe : describe.skip
 
-testOnWindows('create a command shim for a .exe file', async () => {
-  const tempDir = tempy.directory()
-  fs.writeFileSync(path.join(tempDir, 'foo.exe'), '', 'utf8')
-  await cmdShim(path.join(tempDir, 'foo'), path.join(tempDir, 'dest'))
-  const stripMarker = (s) => s.replace(/# cmd-shim-target=.*\n/, '')
-  expect(stripMarker(fs.readFileSync(path.join(tempDir, 'dest'), 'utf-8'))).toMatchSnapshot()
-  expect(fs.readFileSync(path.join(tempDir, 'dest.cmd'), 'utf-8')).toMatchSnapshot()
-  expect(fs.readFileSync(path.join(tempDir, 'dest.ps1'), 'utf-8')).toMatchSnapshot()
+describeOnWindows('create a command shim for a .exe file', () => {
+  test('shim files', async (t) => {
+    const tempDir = tempy.directory()
+    fs.writeFileSync(path.join(tempDir, 'foo.exe'), '', 'utf8')
+    await cmdShim(path.join(tempDir, 'foo'), path.join(tempDir, 'dest'))
+    const stripMarker = (s) => s.replace(/# cmd-shim-target=.*\n/, '')
+    t.assert.snapshot(stripMarker(fs.readFileSync(path.join(tempDir, 'dest'), 'utf-8')))
+    t.assert.snapshot(fs.readFileSync(path.join(tempDir, 'dest.cmd'), 'utf-8'))
+    t.assert.snapshot(fs.readFileSync(path.join(tempDir, 'dest.ps1'), 'utf-8'))
+  })
 })

test/__snapshots__/e2e.test.js.snap → test/e2e.test.js.snapshot

@@ -1,7 +1,6 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+exports[`create a command shim for a .exe file > shim files 1`] = `
 
-exports[`create a command shim for a .exe file 1`] = `
-"#!/bin/sh
+#!/bin/sh
 basedir=$(dirname "$(echo "$0" | sed -e 's,\\\\,/,g')")
 
 case \`uname\` in
@@ -14,17 +13,19 @@ esac
 
 "$basedir/foo"   "$@"
 exit $?
-"
+
 `;
 
-exports[`create a command shim for a .exe file 2`] = `
-"@SETLOCAL
+exports[`create a command shim for a .exe file > shim files 2`] = `
+
+@SETLOCAL
 @"%~dp0\\foo"   %*
-"
+
 `;
 
-exports[`create a command shim for a .exe file 3`] = `
-"#!/usr/bin/env pwsh
+exports[`create a command shim for a .exe file > shim files 3`] = `
+
+#!/usr/bin/env pwsh
 $basedir=Split-Path $MyInvocation.MyCommand.Definition -Parent
 
 $exe=""
@@ -40,5 +41,5 @@ if ($MyInvocation.ExpectingInput) {
   & "$basedir/foo"   $args
 }
 exit $LASTEXITCODE
-"
+
 `;

test/setup.js

@@ -27,16 +27,16 @@ const fixtureFiles = {
   }
 }
 
-beforeAll(() => {
-  const fs = memfs.promises
-  return Promise.all(
+export async function setupFixtures () {
+  const fsPromises = memfs.promises
+  await Promise.all(
     Object.entries(fixtureFiles).map(async ([dir, files]) => {
-      await fs.mkdir(dir, { recursive: true })
+      await fsPromises.mkdir(dir, { recursive: true })
       return Promise.all(
         Object.entries(files).map(([filename, contents]) => {
-          return fs.writeFile(path.join(dir, filename), contents)
+          return fsPromises.writeFile(path.join(dir, filename), contents)
         })
       )
     })
   )
-})
+}