ci: Wait 5 seconds for the test server to start (#5551)

GH actions couldn't send a curl request to the test server. As we launch
the server in the background, GH actions could require some time until
the test server launches. Therefore, we now check for 5 seconds in a
loop if it runs.

Fixes GH-5550

Author: philipphofmann

.github/workflows/test.yml

@@ -171,12 +171,8 @@ jobs:
       - name: Print hardware info
         run: system_profiler SPHardwareDataType
 
-      - name: Allow test-server to run
-        run: chmod +x ./test-server-exec
-      - run: ./test-server-exec &
-
-      - name: Check test-server runs
-        run: curl http://localhost:8080/echo-baggage-header
+      - name: Start Test Server
+        run: ./scripts/start-test-server.sh
 
       - run: ./scripts/ci-select-xcode.sh ${{matrix.xcode}}
 

scripts/start-test-server.sh

@@ -0,0 +1,50 @@
+#!/bin/bash
+
+set -euo pipefail
+
+log() {
+    echo "[$(date '+%H:%M:%S')] $1"
+}
+
+is_server_running() {
+    curl -s http://localhost:8080/echo-baggage-header > /dev/null 2>&1
+}
+
+log "🚀 Starting test server..."
+
+log "Make the test server executable"
+chmod +x ./test-server-exec
+
+log "Start the test server in the background"
+./test-server-exec &
+
+log "⏳ Waiting for 5 seconds that the test server to responds"
+
+start_time=$(date +%s)
+server_started=false
+
+while true; do
+    if is_server_running; then
+        log "✅ Test server is running and responding."
+        server_started=true
+        break
+    else
+        log "⏳ Test server is not yet responding, waiting..."
+    fi
+
+    current_time=$(date +%s)
+    elapsed=$((current_time - start_time))
+
+    if [ $elapsed -ge 5 ]; then
+        break
+    fi
+    
+    sleep 0.1
+done
+
+if [ "$server_started" = true ]; then
+    log "✅ Test server successfully started and is responding at http://localhost:8080"
+else
+    log "❌ Test server failed to start or is not responding after 5 seconds"
+    exit 1
+fi