HA Test Harness

Use when adding tests for a custom integration.

Quick start

• Unit test the coordinator (success, cached fallback, error paths, option changes).
• Validate register maps and expected entities (keys, tiers, categories).
• Test entity properties (state_class/device_class/units) and translation_key wiring.
• Write-path tests: encoding, device_id usage, no immediate refresh contention.

References

• references/coordinator-tests.md
• references/entity-tests.md
• references/write-path-tests.md
• references/registry-stability.md