test: use random ports where possible

This helps to prevent issues where a failed test can keep a bound
socket open long enough to cause other tests to fail with EADDRINUSE
because the same port number is used.

PR-URL: https://github.com/nodejs/node/pull/7045
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Rod Vagg <rod@vagg.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/test/parallel/test-repl-require.js b/test/parallel/test-repl-require.js
index 2638b9643c..9dc3b51de7 100644
--- a/test/parallel/test-repl-require.js
+++ b/test/parallel/test-repl-require.js
@@ -15,11 +15,12 @@ const server = net.createServer((conn) => {
 });
 
 const host = common.localhostIPv4;
-const port = common.PORT;
+const port = 0;
 const options = { host, port };
 
 var answer = '';
 server.listen(options, function() {
+  options.port = this.address().port;
   const conn = net.connect(options);
   conn.setEncoding('utf8');
   conn.on('data', (data) => answer += data);