version: '2.3'
services:
  proxy:
    image: "${TEST_TAG}"
    healthcheck:
      test: ["CMD", "sh", "-exc", "squidclient -T 3 mgr:info 2> /dev/null | grep -qF '200 OK'"]
      interval: 5s
      timeout: 3s
      retries: 5
      start_period: 1s
  sut:
    image: "${TEST_TAG}"
    links: 
      - proxy
    depends_on:
      - proxy
    command: sh -exc "sleep 10 && squidclient -h proxy -T 3 'https://postman-echo.com/get?squidtest=ok' 2> /dev/null | grep -qF '200 OK'"