From 36763fa53263a523d85cde76deb8efa357b27150 Mon Sep 17 00:00:00 2001
From: Erick Wendel <erick.workspace@gmail.com>
Date: Sun, 3 Sep 2023 16:08:26 -0300
Subject: [PATCH] test_runner: preserve original property descriptor

PR-URL: https://github.com/nodejs/node/pull/49433
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Raz Luvaton <rluvaton@gmail.com>
Reviewed-By: Chemi Atlow <chemi@atlow.co.il>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
---
 lib/internal/test_runner/mock/mock_timers.js | 196 +++++++++++++++----
 test/parallel/test-runner-mock-timers.js     |  46 +++++
 2 files changed, 207 insertions(+), 35 deletions(-)

diff --git a/lib/internal/test_runner/mock/mock_timers.js b/lib/internal/test_runner/mock/mock_timers.js
index a718bf34d5ba50..7e38f9f7b5113c 100644
--- a/lib/internal/test_runner/mock/mock_timers.js
+++ b/lib/internal/test_runner/mock/mock_timers.js
@@ -11,6 +11,8 @@ const {
   DateNow,
   FunctionPrototypeApply,
   FunctionPrototypeBind,
+  ObjectDefineProperty,
+  ObjectGetOwnPropertyDescriptor,
   Promise,
   SymbolAsyncIterator,
   SymbolDispose,
@@ -239,11 +241,7 @@ class MockTimers {
       toFake: {
         __proto__: null,
         setTimeout: () => {
-          this.#realSetTimeout = globalThis.setTimeout;
-          this.#realClearTimeout = globalThis.clearTimeout;
-          this.#realTimersSetTimeout = nodeTimers.setTimeout;
-          this.#realTimersClearTimeout = nodeTimers.clearTimeout;
-          this.#realPromisifiedSetTimeout = nodeTimersPromises.setTimeout;
+          this.#storeOriginalSetTimeout();
 
           globalThis.setTimeout = this.#setTimeout;
           globalThis.clearTimeout = this.#clearTimeout;
@@ -257,11 +255,7 @@ class MockTimers {
           );
         },
         setInterval: () => {
-          this.#realSetInterval = globalThis.setInterval;
-          this.#realClearInterval = globalThis.clearInterval;
-          this.#realTimersSetInterval = nodeTimers.setInterval;
-          this.#realTimersClearInterval = nodeTimers.clearInterval;
-          this.#realPromisifiedSetInterval = nodeTimersPromises.setInterval;
+          this.#storeOriginalSetInterval();
 
           globalThis.setInterval = this.#setInterval;
           globalThis.clearInterval = this.#clearInterval;
@@ -275,10 +269,7 @@ class MockTimers {
           );
         },
         setImmediate: () => {
-          this.#realSetImmediate = globalThis.setImmediate;
-          this.#realClearImmediate = globalThis.clearImmediate;
-          this.#realTimersSetImmediate = nodeTimers.setImmediate;
-          this.#realTimersClearImmediate = nodeTimers.clearImmediate;
+          this.#storeOriginalSetImmediate();
 
           globalThis.setImmediate = this.#setImmediate;
           globalThis.clearImmediate = this.#clearImmediate;
@@ -295,31 +286,13 @@ class MockTimers {
       toReal: {
         __proto__: null,
         setTimeout: () => {
-          globalThis.setTimeout = this.#realSetTimeout;
-          globalThis.clearTimeout = this.#realClearTimeout;
-
-          nodeTimers.setTimeout = this.#realTimersSetTimeout;
-          nodeTimers.clearTimeout = this.#realTimersClearTimeout;
-
-          nodeTimersPromises.setTimeout = this.#realPromisifiedSetTimeout;
+          this.#restoreOriginalSetTimeout();
         },
         setInterval: () => {
-          globalThis.setInterval = this.#realSetInterval;
-          globalThis.clearInterval = this.#realClearInterval;
-
-          nodeTimers.setInterval = this.#realTimersSetInterval;
-          nodeTimers.clearInterval = this.#realTimersClearInterval;
-
-          nodeTimersPromises.setInterval = this.#realPromisifiedSetInterval;
+          this.#restoreOriginalSetInterval();
         },
         setImmediate: () => {
-          globalThis.setImmediate = this.#realSetImmediate;
-          globalThis.clearImmediate = this.#realClearImmediate;
-
-          nodeTimers.setImmediate = this.#realTimersSetImmediate;
-          nodeTimers.clearImmediate = this.#realTimersClearImmediate;
-
-          nodeTimersPromises.setImmediate = this.#realPromisifiedSetImmediate;
+          this.#restoreSetImmediate();
         },
       },
     };
@@ -329,6 +302,159 @@ class MockTimers {
     this.#isEnabled = activate;
   }
 
+  #restoreSetImmediate() {
+    ObjectDefineProperty(
+      globalThis,
+      'setImmediate',
+      this.#realSetImmediate,
+    );
+    ObjectDefineProperty(
+      globalThis,
+      'clearImmediate',
+      this.#realClearImmediate,
+    );
+    ObjectDefineProperty(
+      nodeTimers,
+      'setImmediate',
+      this.#realTimersSetImmediate,
+    );
+    ObjectDefineProperty(
+      nodeTimers,
+      'clearImmediate',
+      this.#realTimersClearImmediate,
+    );
+    ObjectDefineProperty(
+      nodeTimersPromises,
+      'setImmediate',
+      this.#realPromisifiedSetImmediate,
+    );
+  }
+
+  #restoreOriginalSetInterval() {
+    ObjectDefineProperty(
+      globalThis,
+      'setInterval',
+      this.#realSetInterval,
+    );
+    ObjectDefineProperty(
+      globalThis,
+      'clearInterval',
+      this.#realClearInterval,
+    );
+    ObjectDefineProperty(
+      nodeTimers,
+      'setInterval',
+      this.#realTimersSetInterval,
+    );
+    ObjectDefineProperty(
+      nodeTimers,
+      'clearInterval',
+      this.#realTimersClearInterval,
+    );
+    ObjectDefineProperty(
+      nodeTimersPromises,
+      'setInterval',
+      this.#realPromisifiedSetInterval,
+    );
+  }
+
+  #restoreOriginalSetTimeout() {
+    ObjectDefineProperty(
+      globalThis,
+      'setTimeout',
+      this.#realSetTimeout,
+    );
+    ObjectDefineProperty(
+      globalThis,
+      'clearTimeout',
+      this.#realClearTimeout,
+    );
+    ObjectDefineProperty(
+      nodeTimers,
+      'setTimeout',
+      this.#realSetTimeout,
+    );
+    ObjectDefineProperty(
+      nodeTimers,
+      'clearTimeout',
+      this.#realTimersClearTimeout,
+    );
+    ObjectDefineProperty(
+      nodeTimersPromises,
+      'setTimeout',
+      this.#realPromisifiedSetTimeout,
+    );
+  }
+
+  #storeOriginalSetImmediate() {
+    this.#realSetImmediate = ObjectGetOwnPropertyDescriptor(
+      globalThis,
+      'setImmediate',
+    );
+    this.#realClearImmediate = ObjectGetOwnPropertyDescriptor(
+      globalThis,
+      'clearImmediate',
+    );
+    this.#realTimersSetImmediate = ObjectGetOwnPropertyDescriptor(
+      nodeTimers,
+      'setImmediate',
+    );
+    this.#realTimersClearImmediate = ObjectGetOwnPropertyDescriptor(
+      nodeTimers,
+      'clearImmediate',
+    );
+    this.#realPromisifiedSetImmediate = ObjectGetOwnPropertyDescriptor(
+      nodeTimersPromises,
+      'setImmediate',
+    );
+  }
+
+  #storeOriginalSetInterval() {
+    this.#realSetInterval = ObjectGetOwnPropertyDescriptor(
+      globalThis,
+      'setInterval',
+    );
+    this.#realClearInterval = ObjectGetOwnPropertyDescriptor(
+      globalThis,
+      'clearInterval',
+    );
+    this.#realTimersSetInterval = ObjectGetOwnPropertyDescriptor(
+      nodeTimers,
+      'setInterval',
+    );
+    this.#realTimersClearInterval = ObjectGetOwnPropertyDescriptor(
+      nodeTimers,
+      'clearInterval',
+    );
+    this.#realPromisifiedSetInterval = ObjectGetOwnPropertyDescriptor(
+      nodeTimersPromises,
+      'setInterval',
+    );
+  }
+
+  #storeOriginalSetTimeout() {
+    this.#realSetTimeout = ObjectGetOwnPropertyDescriptor(
+      globalThis,
+      'setTimeout',
+    );
+    this.#realClearTimeout = ObjectGetOwnPropertyDescriptor(
+      globalThis,
+      'clearTimeout',
+    );
+    this.#realTimersSetTimeout = ObjectGetOwnPropertyDescriptor(
+      nodeTimers,
+      'setTimeout',
+    );
+    this.#realTimersClearTimeout = ObjectGetOwnPropertyDescriptor(
+      nodeTimers,
+      'clearTimeout',
+    );
+    this.#realPromisifiedSetTimeout = ObjectGetOwnPropertyDescriptor(
+      nodeTimersPromises,
+      'setTimeout',
+    );
+  }
+
   tick(time = 1) {
     if (!this.#isEnabled) {
       throw new ERR_INVALID_STATE(
diff --git a/test/parallel/test-runner-mock-timers.js b/test/parallel/test-runner-mock-timers.js
index 7b37c6ae4b8d74..c740aa3b4958d4 100644
--- a/test/parallel/test-runner-mock-timers.js
+++ b/test/parallel/test-runner-mock-timers.js
@@ -47,6 +47,52 @@ describe('Mock Timers Test Suite', () => {
       });
     });
 
+    it('should check that propertyDescriptor gets back after reseting timers', (t) => {
+      const getDescriptor = (ctx, fn) => Object.getOwnPropertyDescriptor(ctx, fn);
+      const getCurrentTimersDescriptors = () => {
+        const timers = [
+          'setTimeout',
+          'clearTimeout',
+          'setInterval',
+          'clearInterval',
+          'setImmediate',
+          'clearImmediate',
+        ];
+
+        const globalTimersDescriptors = timers.map((fn) => getDescriptor(global, fn));
+        const nodeTimersDescriptors = timers.map((fn) => getDescriptor(nodeTimers, fn));
+        const nodeTimersPromisesDescriptors = timers
+          .filter((fn) => !fn.includes('clear'))
+          .map((fn) => getDescriptor(nodeTimersPromises, fn));
+
+        return {
+          global: globalTimersDescriptors,
+          nodeTimers: nodeTimersDescriptors,
+          nodeTimersPromises: nodeTimersPromisesDescriptors,
+        };
+      };
+      const before = getCurrentTimersDescriptors();
+      t.mock.timers.enable();
+      const during = getCurrentTimersDescriptors();
+      t.mock.timers.reset();
+      const after = getCurrentTimersDescriptors();
+
+      assert.deepStrictEqual(
+        before,
+        after,
+      );
+
+      assert.notDeepStrictEqual(
+        before,
+        during,
+      );
+
+      assert.notDeepStrictEqual(
+        during,
+        after,
+      );
+    });
+
     it('should reset all timers when calling .reset function', (t) => {
       t.mock.timers.enable();
       const fn = t.mock.fn();