net: deprecate _setSimultaneousAccepts() undocumented function

This is an undocumented utility function that is of questionable
utility.

Fixes: https://github.com/nodejs/node/issues/18391

PR-URL: https://github.com/nodejs/node/pull/23760
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/test/parallel/test-net-deprecated-setsimultaneousaccepts.js b/test/parallel/test-net-deprecated-setsimultaneousaccepts.js
new file mode 100644
index 0000000000..6d1d62e6cb
--- /dev/null
+++ b/test/parallel/test-net-deprecated-setsimultaneousaccepts.js
@@ -0,0 +1,16 @@
+// Flags: --no-warnings
+'use strict';
+
+const {
+  expectWarning
+} = require('../common');
+const {
+  _setSimultaneousAccepts
+} = require('net');
+
+expectWarning(
+  'DeprecationWarning',
+  'net._setSimultaneousAccepts() is deprecated and will be removed.',
+  'DEP00XX');
+
+_setSimultaneousAccepts();