Use fixtures for all entity IDs in Evohome tests

[zxdavb]

Proposed change

SSIA.

This prepares Evohome for upcoming changes where it may be possible to have more than one HotWater entity.

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 PR is related to issue:
• Link to documentation pull request:
• Link to developer documentation pull request:
• Link to frontend pull request:

Checklist

• I understand the code I am submitting and can explain how it works.
• 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.
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• The code has been formatted using Ruff (ruff format homeassistant tests)
• Tests have been added to verify that the new code works.
• Any generated code has been carefully reviewed for correctness and compliance with project standards.

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

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

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  Updated and included derived files by running: python3 -m script.hassfest.
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  Updated by running python3 -m script.gen_requirements_all.
• For the updated dependencies a diff between library versions and ideally a link to the changelog/release notes is added to the PR description.

To help with the load of incoming pull requests:

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

[Copilot]

Pull request overview

This PR updates Evohome tests to stop relying on hard-coded entity IDs and instead resolve entity IDs from the entity registry via fixtures, making the suite resilient to entity_id naming changes in the integration.

Changes:

• Replace the hard-coded DHW water heater entity_id in water heater tests with a dhw_id fixture.
• Add an entity_id helper fixture (platform + unique_id → entity_id) and refactor ctl_id/zone_id to use unique_id-based lookups.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
tests/components/evohome/test_water_heater.py	Switch DHW service calls to use the new dhw_id fixture instead of a constant entity_id.
tests/components/evohome/conftest.py	Introduce entity_id/dhw_id fixtures and refactor ctl_id/zone_id to resolve entity_ids via the entity registry and unique_ids.

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

[MartinHjelmare]

Thanks!

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.