ci: retry flaky tests on Windows Node.js 24

Assisted-by: openai:gpt-5.5
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>

Author: trivikr

scripts/platform-shell.js

@@ -5,8 +5,13 @@ const { writeFileSync } = require('node:fs')
 const { resolve } = require('node:path')
 
 if (platform() === 'win32') {
+  const shouldRetryTests = process.env.GITHUB_ACTIONS === 'true' && process.versions.node.split('.')[0] === '24'
+  const scriptShell = shouldRetryTests
+    ? resolve(__dirname, 'retry-test-shell.cmd')
+    : 'C:\\windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe'
+
   writeFileSync(
-    resolve(__dirname, '.npmrc'),
-    'script-shell = "C:\\windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe"\n'
+    resolve(__dirname, shouldRetryTests ? '..' : '.', '.npmrc'),
+    `script-shell = "${scriptShell}"\n`
   )
 }

scripts/retry-test-shell.cmd

@@ -0,0 +1,2 @@
+@echo off
+powershell.exe -NoLogo -NoProfile -ExecutionPolicy Bypass -File "%~dp0retry-test-shell.ps1" %*

scripts/retry-test-shell.ps1

@@ -0,0 +1,32 @@
+$testScripts = @(
+  'test:cache',
+  'test:cache-interceptor',
+  'test:cache-tests',
+  'test:cookies',
+  'test:eventsource',
+  'test:fetch',
+  'test:infra',
+  'test:interceptors',
+  'test:jest',
+  'test:node-fetch',
+  'test:node-test',
+  'test:subresource-integrity',
+  'test:unit',
+  'test:websocket',
+  'test:wpt'
+)
+
+$command = $args[-1]
+$shouldRetry = $testScripts -contains $env:npm_lifecycle_event
+
+cmd.exe /d /s /c $command
+$exitCode = $LASTEXITCODE
+
+if ($exitCode -eq 0 -or -not $shouldRetry) {
+  exit $exitCode
+}
+
+Write-Host "Command failed with exit code $exitCode. Retrying once on Windows with Node.js 24."
+
+cmd.exe /d /s /c $command
+exit $LASTEXITCODE