Replace fs-extra with newer fs built-ins

This updates the codebase to remove two uses of fs-extra by newer fs
built-in functions. The code changes are based on the implementation of
[email protected], which is the version of fs-extra recorded in the
project's lockfile.

In particular, for `watch.spec.js`, the changes are based on:
https://github.com/jprichardson/node-fs-extra/blob/0220eac966d7d6b9a595d69b1242ab8a397fba7f/lib/remove/index.js#L15

and, also for `helper.js`, the changes are based on:
https://github.com/jprichardson/node-fs-extra/blob/0220eac966d7d6b9a595d69b1242ab8a397fba7f/lib/mkdirs/make-dir.js#L23

package.json

@@ -129,7 +129,6 @@
     "cross-env": "^7.0.2",
     "eslint": "^8.56.0",
     "fail-on-errors-webpack-plugin": "^3.0.0",
-    "fs-extra": "^10.0.0",
     "globals": "^13.24.0",
     "installed-check": "^9.3.0",
     "jsdoc": "^3.6.7",

test/integration/helpers.js

@@ -2,7 +2,8 @@
 
 const escapeRegExp = require('escape-string-regexp');
 const os = require('os');
-const fs = require('fs-extra');
+const fs = require('fs');
+const fsP = require('fs/promises');
 const {format} = require('util');
 const path = require('path');
 const Base = require('../../lib/reporters/base');
@@ -487,7 +488,7 @@ const touchRef = new Date();
  * @param {string} filepath - Path to file
  */
 function touchFile(filepath) {
-  fs.ensureDirSync(path.dirname(filepath));
+  fs.mkdirSync(path.dirname(filepath), { recursive: true });
   try {
     fs.utimesSync(filepath, touchRef, touchRef);
   } catch (e) {
@@ -519,21 +520,21 @@ function replaceFileContents(filepath, pattern, replacement) {
  */
 function copyFixture(fixtureName, dest) {
   const fixtureSource = resolveFixturePath(fixtureName);
-  fs.ensureDirSync(path.dirname(dest));
-  fs.copySync(fixtureSource, dest);
+  fs.mkdirSync(path.dirname(dest), { recursive: true });
+  fs.cpSync(fixtureSource, dest);
 }
 
 /**
  * Creates a temporary directory
  * @returns {Promise<CreateTempDirResult>} Temp dir path and cleanup function
  */
 const createTempDir = async () => {
-  const dirpath = await fs.mkdtemp(path.join(os.tmpdir(), 'mocha-'));
+  const dirpath = await fsP.mkdtemp(path.join(os.tmpdir(), 'mocha-'));
   return {
     dirpath,
     removeTempDir: async () => {
       if (!process.env.MOCHA_TEST_KEEP_TEMP_DIRS) {
-        return fs.remove(dirpath);
+        return fs.rmSync(dirpath, { recursive: true, force: true });
       }
     }
   };

test/integration/options/watch.spec.js

@@ -1,6 +1,6 @@
 'use strict';
 
-const fs = require('fs-extra');
+const fs = require('fs');
 const path = require('path');
 const {
   copyFixture,
@@ -131,7 +131,7 @@ describe('--watch', function () {
         [testFile, '--watch-files', 'lib/**/*.xyz'],
         tempDir,
         () => {
-          fs.removeSync(watchedFile);
+          fs.rmSync(watchedFile, { recursive: true, force: true });
         }
       ).then(results => {
         expect(results, 'to have length', 2);