docker_container healthcheck is not compared correctly in ansible 2.10

[Hennns]

Summary

I use the following configuration, this works on ansible 2.9 (and follows the documentation).
community.general.docker_container:
healthcheck:
test: ["NONE"]
comparisons:
'*': strict

However, on ansible 2.10.5 this will cause the container to always be restarted.

Running with --check --diff I get the following output:

>  {
> -    "expected_healthcheck": {
> -        "Test": [
> -            "NONE"
> -        ]
> -    }
> +    "expected_healthcheck": {}
>  }

I attempted two other configurations:
healthcheck: {}
and:
healthcheck:
test: []

However, then I get this warning:
[WARNING]: healthcheck is ignored when test is not specified.

I can 'fix' this by simply ignoring the healthcheck:
healthcheck:
test: ["NONE"]
comparisons:
healthcheck: ignore
'*': strict

But I want to explicitly not have a healthcheck (so it doesn't quite work). It seems that something has changed between ansible 2.9 and ansible 2.10 here.

Issue Type

Bug Report

Component Name

community.general.docker_container

Ansible Version

ansible 2.10.5
  config file = /etc/ansible/ansible.cfg
  configured module search path = [u'/root/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python2.7/site-packages/ansible
  executable location = /usr/bin/ansible
  python version = 2.7.5 (default, Oct 30 2018, 23:45:53) [GCC 4.8.5 20150623 (Red Hat 4.8.5-36)]

[felixfontein]

I guess this was caused by ansible/ansible#66599. I'll have to take a longer look later today or tomorrow.

[felixfontein]

resolved_by_pr #88