test: add regression test for #11257

Refs: #11257
PR-URL: #20391
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>

Author: Benjamin Coe

test/parallel/test-stdio-pipe-stderr.js

@@ -0,0 +1,37 @@
+'use strict';
+require('../common');
+consttmpdir=require('../common/tmpdir');
+constassert=require('assert');
+constfs=require('fs');
+constjoin=require('path').join;
+constspawn=require('child_process').spawnSync;
+
+// Test that invoking node with require, and piping stderr to file,
+// does not result in exception,
+// see: https://github.com/nodejs/node/issues/11257
+
+tmpdir.refresh();
+constfakeModulePath=join(tmpdir.path,'batman.js');
+conststderrOutputPath=join(tmpdir.path,'stderr-output.txt');
+// we need to redirect stderr to a file to produce #11257
+conststream=fs.createWriteStream(stderrOutputPath);
+
+// the error described in #11257 only happens when we require a
+// non-built-in module.
+fs.writeFileSync(fakeModulePath,'','utf8');
+
+stream.on('open',()=>{
+spawn(process.execPath,{
+input: `require("${fakeModulePath.replace(/\\/g,'/')}")`,
+stdio: ['pipe','pipe',stream]
+});
+conststderr=fs.readFileSync(stderrOutputPath,'utf8').trim();
+assert.strictEqual(
+stderr,
+'',
+`piping stderr to file should not result in exception: ${stderr}`
+);
+stream.end();
+fs.unlinkSync(stderrOutputPath);
+fs.unlinkSync(fakeModulePath);
+});