Adds states and state_attr as a filter, adds is_state and is_state_attr as a test.

[Petro31]

Breaking change

No

Proposed change

Add states as a filter, e.g:

{{ ['sensor.a', 'sensor.b'] | map('states') | list }}

cleans up code like this: {{ expand(['sensor.a', 'sensor.b']) | map(attribute='state') | list }}

Adds is_state as a test, e.g:

{{ ['sensor.a', 'sensor.b'] | select('is_state', 'on') | list }}

cleans up code like this: {{ expand(['sensor.a', 'sensor.b']) | selectattr('state', 'eq', 'on') | map(attribute='entity_id') | list }}

Adds state_attr as a filter, e.g:

{{ ['sensor.a', 'sensor.b'] | map('state_attr', 'friendly_name') | list }}

cleans up code like this: {{ expand(['sensor.a', 'sensor.b']) | map(attribute='attributes.friendly_name') | list }}

Adds is_state as a test, e.g:

{{ ['sensor.a', 'sensor.b'] | select('is_state_attr', 'friendly_name', 'Temperature') | list }}

cleans up code like this: {{ expand(['sensor.a', 'sensor.b']) | selectattr('attributes.friendly_name', 'eq', 'Temperature') | map(attribute='entity_id') | list }}

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 # This WTHhttps://community.home-assistant.io/t/wth-state-based-jinja-functions-are-not-filters-or-tests/468187
• 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

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• 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.

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[frenck]

LGTM @Petro31
I think for these it makes sense in a way 👍