Make CI more robust

Author: cressie176

.github/workflows/test.yml

@@ -14,13 +14,13 @@ jobs:
     runs-on: ubuntu-latest
     services:
       rabbitmq:
-        image: rabbitmq
+        image: rabbitmq:3.12-alpine
         ports:
           - 5672:5672
 
     strategy:
       matrix:
-        node-version: [10.x, 12.x, 14.x, 16.x, 18.x]
+        node-version: [10.x, 12.x, 14.x, 16.x, 18.x, 20.x]
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
 
     steps:
@@ -34,5 +34,18 @@ jobs:
       # Install all prerequisites
       - run: npm ci
 
+      # Ensure RabbitMQ is available before continuing
+      - run: |
+          n=0
+          while :
+          do
+            sleep 5
+            echo 'HELO\n\n\n\n' | nc localhost 5672 | grep AMQP
+            [[ $? = 0 ]] && break || ((n++))
+            (( n >= 5 )) && break
+          done
+
+      - run: echo 'HELO\n\n\n\n' | nc localhost 5672 | grep AMQP
+
       # Run the tests
       - run: make test