Fix forces replacement on empty array

[sinc59]

Trying to fix the issue #11544
This is my first commit in go language, feel free to discuss and explain any newbie errors.

We have an inconsistent plan (force replacement) on the "azurerm_container_group" resource when options or search_domains is not set (null or []).
Azure api return list as "a b c" format, when options or search_domains is empty, with the Split function the array is not empty, using the Fields function i have a true empty array and an consistent plan (tested through local build and dev_overrides).

Sébastien

[stephybun]

Thanks for this @sinc59. Before we merge this could you please add a test with those arguments omitted from the config so that we can verify that this works as expected?

[sinc59]

Thanks for this @sinc59. Before we merge this could you please add a test with those arguments omitted from the config so that we can verify that this works as expected?

Hi @stephybun i have added null ressources to validate the changes. I've only change the "options" test argument to validate null value (on options) and "nameservers" list to validate if not empty.

This is ok ?

[stephybun]

LGTM 💯 thanks @sinc59!

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