Add more tests for private docker registries

test/integration/roles/test_docker/tasks/docker-tests.yml

@@ -33,3 +33,34 @@
   assert:
     that:
       - "'hello world' in docker_output.stdout_lines"
+
+- name: Run a script that sets environment in busybox
+  docker:
+    image: busybox
+    state: reloaded
+    pull: always
+    env:
+      TEST: hello
+    command: '/bin/sh -c "nc -l -p 2000 -e xargs -n1 echo $TEST"'
+    detach: True
+
+- name: Get the docker container id
+  shell: "docker ps | grep busybox | awk '{ print $1 }'"
+  register: container_id
+
+- name: Get the docker container ip
+  shell: "docker inspect {{ container_id.stdout_lines[0] }} | grep IPAddress | awk -F '\"' '{ print $4 }'"
+  register: container_ip
+
+- name: Try to access the server
+  shell: "echo 'world' | nc {{ container_ip.stdout_lines[0] }} 2000"
+  register: docker_output
+
+- name: check that the script ran
+  assert:
+    that:
+      - "'hello world' in docker_output.stdout_lines"
+
+- name: Remove the busybox image from the local docker
+  shell: "docker rmi -f busybox"
+