[v18.x backport] Backport a couple of PRs

lib/fs.js

@@ -160,6 +160,7 @@ let ReadStream;
 let WriteStream;
 let rimraf;
 let rimrafSync;
+let kResistStopPropagation;
 
 // These have to be separate because of how graceful-fs happens to do it's
 // monkeypatching.
@@ -2428,7 +2429,8 @@ function watch(filename, options, listener) {
       process.nextTick(() => watcher.close());
     } else {
       const listener = () => watcher.close();
-      options.signal.addEventListener('abort', listener);
+      kResistStopPropagation ??= require('internal/event_target').kResistStopPropagation;
+      options.signal.addEventListener('abort', listener, { __proto__: null, [kResistStopPropagation]: true });
       watcher.once('close', () => {
         options.signal.removeEventListener('abort', listener);
       });

lib/internal/fs/recursive_watch.js

@@ -42,6 +42,7 @@ function lazyLoadFsSync() {
   internalSync ??= require('fs');
   return internalSync;
 }
+let kResistStopPropagation;
 
 async function traverse(dir, files = new SafeMap(), symbolicLinks = new SafeSet()) {
   const { opendir } = lazyLoadFsPromises();
@@ -265,7 +266,8 @@ class FSWatcher extends EventEmitter {
       } : (resolve, reject) => {
         const onAbort = () => reject(new AbortError(undefined, { cause: signal.reason }));
         if (signal.aborted) return onAbort();
-        signal.addEventListener('abort', onAbort, { __proto__: null, once: true });
+        kResistStopPropagation ??= require('internal/event_target').kResistStopPropagation;
+        signal.addEventListener('abort', onAbort, { __proto__: null, once: true, [kResistStopPropagation]: true });
         this.once('change', (eventType, filename) => {
           signal.removeEventListener('abort', onAbort);
           resolve({ __proto__: null, value: { eventType, filename } });

lib/internal/fs/watchers.js

@@ -299,6 +299,8 @@ ObjectDefineProperty(FSEvent.prototype, 'owner', {
   set(v) { return this[owner_symbol] = v; },
 });
 
+let kResistStopPropagation;
+
 async function* watch(filename, options = kEmptyObject) {
   const path = toNamespacedPath(getValidatedPath(filename));
   validateObject(options, 'options');
@@ -330,7 +332,10 @@ async function* watch(filename, options = kEmptyObject) {
   };
 
   try {
-    signal?.addEventListener('abort', oncancel, { once: true });
+    if (signal) {
+      kResistStopPropagation ??= require('internal/event_target').kResistStopPropagation;
+      signal.addEventListener('abort', oncancel, { __proto__: null, once: true, [kResistStopPropagation]: true });
+    }
     handle.onchange = (status, eventType, filename) => {
       if (status < 0) {
         const error = uvException({

lib/internal/test_runner/mock.js → lib/internal/test_runner/mock/mock.js

@@ -26,6 +26,7 @@ const {
   validateInteger,
   validateObject,
 } = require('internal/validators');
+const { MockTimers } = require('internal/test_runner/mock/mock_timers');
 
 function kDefaultFunction() {}
 
@@ -106,6 +107,12 @@ delete MockFunctionContext.prototype.nextImpl;
 
 class MockTracker {
   #mocks = [];
+  #timers;
+
+  get timers() {
+    this.#timers ??= new MockTimers();
+    return this.#timers;
+  }
 
   fn(
     original = function() {},
@@ -265,6 +272,7 @@ class MockTracker {
 
   reset() {
     this.restoreAll();
+    this.#timers?.reset();
     this.#mocks = [];
   }