test: deflake stream-readable-to-web test

Co-authored-by: Luigi Pinca <luigipinca@gmail.com>
PR-URL: #58948Fixes: #58949
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Mattias Buelens <mattias@buelens.com>
Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Zeyu "Alex" Yang <himself65@outlook.com>
Reviewed-By: Daeyeon Jeong <daeyeon.dev@gmail.com>

Author: 2 people

test/parallel/test-stream-readable-to-web.js

@@ -0,0 +1,64 @@
+import{mustCall}from'../common/index.mjs';
+import{Readable}from'node:stream';
+import{memoryUsage}from'node:process';
+importassertfrom'node:assert';
+import{setImmediate}from'node:timers/promises';
+
+// Based on: https://github.com/nodejs/node/issues/46347#issuecomment-1413886707
+// edit: make it cross-platform as /dev/urandom is not available on Windows
+
+constMAX_MEM=256*1024*1024;// 256 MiB
+
+functioncheckMemoryUsage(){
+assert(memoryUsage().arrayBuffers<MAX_MEM);
+}
+
+constMAX_BUFFERS=1000;
+letbuffersCreated=0;
+
+constrandomNodeStream=newReadable({
+read(size){
+if(buffersCreated>=MAX_BUFFERS){
+this.push(null);
+return;
+}
+
+this.push(Buffer.alloc(size));
+buffersCreated++;
+}
+});
+
+randomNodeStream.on('error',(err)=>{
+assert.fail(err);
+});
+
+// Before doing anything, make sure memory usage is okay
+checkMemoryUsage();
+
+// Create stream and check memory usage remains okay
+
+constrandomWebStream=Readable.toWeb(randomNodeStream);
+
+checkMemoryUsage();
+
+lettimeout;
+try{
+// Wait two seconds before consuming the stream to see if memory usage increases
+timeout=setTimeout(mustCall(async()=>{
+// Did the stream leak memory?
+checkMemoryUsage();
+// eslint-disable-next-line no-unused-vars
+forawait(const_ofrandomWebStream){
+// Yield event loop to allow garbage collection
+awaitsetImmediate();
+// consume the stream
+// check memory usage remains okay
+checkMemoryUsage();
+}
+}),2000);
+}catch(err){
+if(timeout){
+clearTimeout(timeout);
+}
+assert.fail(err);
+}