Use another linked container for testing instead of using host ports

tests/test.sh

@@ -9,6 +9,7 @@ fi
 trap _catch_err ERR
 trap _cleanup EXIT
 
+ALPINE_VERSION="alpine:3.11"
 LOCAL_DIR="$(cd "$(dirname "$0")" ; pwd -P)"
 . "$LOCAL_DIR"/../conf.env
 
@@ -23,16 +24,17 @@ _cleanup()
 {
     echo "Cleaning up..."
     docker rm -f "${NGINX_VERSION}"_test > /dev/null 2>&1
+    docker rm -f "${NGINX_VERSION}"_requester > /dev/null 2>&1
     rm -rf "$TMP_DIR"
 }
 
 _setup_crypto_stuff()
 {
-    openssl dhparam -out "$TMP_DIR"/dhparams.pem 512
-
+    echo "Generating SSL files..."
+    openssl dhparam -out "$TMP_DIR"/dhparams.pem 512 > /dev/null 2>&1
     openssl req -new -newkey rsa:4096 -days 365 -nodes -x509 \
         -subj "/C=ES/ST=Madrid/L=Madrid/O=dcarrillo/CN=localhost" \
-        -keyout "$TMP_DIR"/cert.key -out "$TMP_DIR"/cert.pem
+        -keyout "$TMP_DIR"/cert.key -out "$TMP_DIR"/cert.pem > /dev/null 2>&1
 }
 
 _check_status_code()
@@ -50,14 +52,15 @@ _check_if_is_ip()
     if echo "$1" | grep -E "^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$" > /dev/null; then
         echo "Test succeeded"
     else
-        printf "Test failed, response %s is not an IP" "$RESPONSE"
+        printf "Response: %s\nTest failed, response is not an IP\n" "$RESPONSE"
         exit 1
     fi
 }
 
 _setup_crypto_stuff
 
-docker run --name "${NGINX_VERSION}"_test --rm -p 65521:80 -p 65523:443 \
+echo "Running container to be tested..."
+docker run --name "${NGINX_VERSION}"_test --rm \
            -v "$LOCAL_DIR"/nginx.conf:/usr/local/nginx/conf/nginx.conf:ro \
            -v "$LOCAL_DIR"/GeoLite2-Country.mmdb:/tmp/GeoLite2-Country.mmdb:ro \
            -v "$TMP_DIR"/cert.pem:/tmp/cert.pem:ro \
@@ -65,14 +68,21 @@ docker run --name "${NGINX_VERSION}"_test --rm -p 65521:80 -p 65523:443 \
            -v "$TMP_DIR"/dhparams.pem:/tmp/dhparams.pem:ro \
            -d "${DOCKER_IMAGE}":"${NGINX_VERSION}" > /dev/null
 
-for request in http://localhost:65521/nginx_status https://localhost:65523/nginx_status; do
-    printf "\nRequesting %s\n" $request
-    STATUS_CODE=$(curl -s -k -m 5 -o /dev/null -w "%{http_code}" $request)
+echo "Preparing requester container..."
+docker run --name "${NGINX_VERSION}"_requester --rm --link "${NGINX_VERSION}"_test \
+           -ti -d $ALPINE_VERSION sh > /dev/null
+exec_docker="docker exec -ti ${NGINX_VERSION}_requester"
+$exec_docker apk add curl > /dev/null
+
+for request in http://${NGINX_VERSION}_test/nginx_status https://${NGINX_VERSION}_test/nginx_status; do
+    printf "\nRequesting %s\n" "$request"
+    STATUS_CODE=$($exec_docker curl -s -k -m 5 -o /dev/null -w "%{http_code}" "$request")
     _check_status_code "$STATUS_CODE"
 done
 
-printf "\nRequesting http://localhost:65521/ip\n"
-RESPONSE=$(curl -s -m 5 http://localhost:65521/ip)
+request="http://${NGINX_VERSION}_test/ip"
+printf "\nRequesting %s\n" "$request"
+RESPONSE=$($exec_docker curl -s -m 5 "$request" | tr -d '\r')
 _check_if_is_ip "$RESPONSE"
 
 echo "All tests succeeded !"