From 4cc2430db2e2c63d924188a11295ba5db77e3738 Mon Sep 17 00:00:00 2001
From: ensonic <ensonic@google.com>
Date: Tue, 3 Feb 2026 11:50:10 +0000
Subject: [PATCH] Allow tests to specify '0' to let the os select a port.

The production uses always initialize the config with the port flag, so this
codepath won't trigger. I can't explain why the tests worked before.
---
 src/go/cmd/http-relay-server/server/server.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/go/cmd/http-relay-server/server/server.go b/src/go/cmd/http-relay-server/server/server.go
index acda1624..e3521e75 100644
--- a/src/go/cmd/http-relay-server/server/server.go
+++ b/src/go/cmd/http-relay-server/server/server.go
@@ -76,7 +76,7 @@ type Server struct {
 }
 
 func NewServer(conf Config) *Server {
-	if conf.Port == 0 {
+	if conf.Port == -1 { // let tests pass a value of 0 to let the os pick a port
 		conf.Port = DefaultPort
 	}
 	if conf.BlockSize == 0 {