Return group unit of measurement when device_class is None

[PoppyPop]

Proposed change

Allows to return calculated unit of measurement if no device class and all source sensors are same unit of measurement.

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)
• Deprecation (breaking change to happen in the future)
• 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 Unit of measurements is not correct #109969
• This PR is related to issue:
• Link to documentation pull request:

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[home-assistant]

Hey there @home-assistant/core, mind taking a look at this pull request as it has been labeled with an integration (group) you are listed as a code owner for? Thanks!

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[gjohansson-ST]

This is not a bugfix as it's working as intended which I mentioned in the issue but I think it's a relevant change to add this in 👍

[home-assistant]

Please take a look at the requested changes, and use the Ready for review button when you are done, thanks 👍

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[gjohansson-ST]

As I have made all the relevant changes on this PR, another core developer should make the review 👍

stale

[PoppyPop]

Hello, sorry for the late reply, i wasn't at home, but i agree, your changes was most elegant that my quick changes