add unit test for nodejs#3410

test/issue-3410.js

@@ -0,0 +1,16 @@
+'use strict'
+
+const { test } = require('node:test')
+const { eventLoopBlocker } = require('./utils/event-loop-blocker')
+const { Agent, fetch, setGlobalDispatcher } = require('..')
+
+test('https://github.com/nodejs/undici/issues/3356', async (t) => {
+  const connectTimeout = 2000
+  setGlobalDispatcher(new Agent({ connectTimeout }))
+
+  const fetchPromise = fetch('http://www.example.org/')
+
+  eventLoopBlocker(3000)
+
+  await fetchPromise
+})

test/utils/event-loop-blocker.js

@@ -0,0 +1,10 @@
+'use strict'
+
+function eventLoopBlocker (ms) {
+  const nil = new Int32Array(new SharedArrayBuffer(4))
+  Atomics.wait(nil, 0, 0, ms)
+}
+
+module.exports = {
+  eventLoopBlocker
+}