Fix HomeKit sensor update check

[br3sc4]

Breaking change

Proposed change

This PR fixes a bug in HomeKit integration: when a sensor reads 0, the integration doesn't call the update callback.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes Light sensor not showing value 0 in HomeKit #62641
• This PR is related to issue:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist
• The code has been formatted using Black (black --fast homeassistant tests)
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

If the code communicates with devices, web services, or third-party tools:

• The manifest file has all fields filled out correctly.
  Updated and included derived files by running: python3 -m script.hassfest.
• New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
• For the updated dependencies - a link to the changelog, or at minimum a diff between library versions is added to the PR description.
• Untested files have been added to .coveragerc.

The integration reached or maintains the following Integration Quality Scale:

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To help with the load of incoming pull requests:

• I have reviewed two other open pull requests in this repository.

[homeassistant]

Hi @br3sc4,

It seems you haven't yet signed a CLA. Please do so here.

Once you do that we will be able to review and accept this pull request.

Thanks!

[probot-home-assistant]

Hey there @bdraco, mind taking a look at this pull request as it has been labeled with an integration (homekit) you are listed as a code owner for? Thanks!
_{^{(message by CodeOwnersMention)}}

[bdraco]

Thanks. Please add a test that sets the state to 0 with hass.states. There should be a few you can copy

[br3sc4]

I added the tests, I hope to make it the right way.

[bdraco]

The hap spec enforces a minimum of 0.0001 for the light level so when you set 0 you will get 0.0001. This is expected

[bdraco]

Please see #62705 (comment)

[bdraco]

Thanks 🙏

[br3sc4]

You're welcome 😉