Upgrade ESM and node-fetch

.prettierrc.js

@@ -1,5 +1,5 @@
 // This is a reusable configuration file copied from https://github.com/actions/reusable-workflows/tree/main/reusable-configurations. Please don't make changes to this file as it's the subject of an automatic update.
-module.exports = {
+export default {
   printWidth: 80,
   tabWidth: 2,
   useTabs: false,

__tests__/authutil.test.ts

@@ -3,17 +3,22 @@ import fs from 'fs';
 import * as path from 'path';
 import * as core from '@actions/core';
 import * as io from '@actions/io';
-import * as auth from '../src/authutil';
-import * as cacheUtils from '../src/cache-utils';
+import * as auth from '../src/authutil.js';
+import * as cacheUtils from '../src/cache-utils.js';
+import {fileURLToPath} from 'url';
+import {jest, describe, beforeEach, afterEach, it, expect} from '@jest/globals';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
 
 let rcFile: string;
 
 describe('authutil tests', () => {
   const _runnerDir = path.join(__dirname, 'runner');
 
-  let cnSpy: jest.SpyInstance;
-  let logSpy: jest.SpyInstance;
-  let dbgSpy: jest.SpyInstance;
+  let cnSpy: ReturnType<typeof jest.spyOn>;
+  let logSpy: ReturnType<typeof jest.spyOn>;
+  let dbgSpy: ReturnType<typeof jest.spyOn>;
 
   beforeAll(async () => {
     const randPath = path.join(Math.random().toString(36).substring(7));

__tests__/cache-restore.test.ts

@@ -3,9 +3,13 @@ import * as cache from '@actions/cache';
 import * as path from 'path';
 import * as glob from '@actions/glob';
 import osm from 'os';
+import {fileURLToPath} from 'url';
 
-import * as utils from '../src/cache-utils';
-import {restoreCache} from '../src/cache-restore';
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+import * as utils from '../src/cache-utils.js';
+import {restoreCache} from '../src/cache-restore.js';
 
 describe('cache-restore', () => {
   process.env['GITHUB_WORKSPACE'] = path.join(__dirname, 'data');

__tests__/cache-save.test.ts

@@ -3,10 +3,14 @@ import * as cache from '@actions/cache';
 import * as glob from '@actions/glob';
 import fs from 'fs';
 import path from 'path';
+import {fileURLToPath} from 'url';
 
-import * as utils from '../src/cache-utils';
-import {run} from '../src/cache-save';
-import {State} from '../src/constants';
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+import * as utils from '../src/cache-utils.js';
+import {run} from '../src/cache-save.js';
+import {State} from '../src/constants.js';
 
 describe('run', () => {
   const yarnFileHash =

__tests__/cache-utils.test.ts

@@ -1,19 +1,23 @@
 import * as core from '@actions/core';
 import * as cache from '@actions/cache';
 import path from 'path';
-import * as utils from '../src/cache-utils';
+import * as utils from '../src/cache-utils.js';
 import {
   PackageManagerInfo,
   isCacheFeatureAvailable,
   supportedPackageManagers,
   isGhes,
   resetProjectDirectoriesMemoized
-} from '../src/cache-utils';
+} from '../src/cache-utils.js';
 import fs from 'fs';
-import * as cacheUtils from '../src/cache-utils';
+import * as cacheUtils from '../src/cache-utils.js';
 import * as glob from '@actions/glob';
 import {Globber} from '@actions/glob';
-import {MockGlobber} from './mock/glob-mock';
+import {MockGlobber} from './mock/glob-mock.js';
+import {fileURLToPath} from 'url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
 
 describe('cache-utils', () => {
   const versionYarn1 = '1.2.3';

__tests__/canary-installer.test.ts

@@ -8,9 +8,9 @@ import fs from 'fs';
 import cp from 'child_process';
 import osm from 'os';
 import path from 'path';
-import * as main from '../src/main';
-import * as auth from '../src/authutil';
-import {INodeVersion} from '../src/distributions/base-models';
+import * as main from '../src/main.js';
+import * as auth from '../src/authutil.js';
+import {INodeVersion} from '../src/distributions/base-models.js';
 
 import nodeTestManifest from './data/versions-manifest.json';
 import nodeTestDist from './data/node-dist-index.json';