deterministic-service-test

Deterministic Service Test (Control)

Use this skill when creating tests for service modules. Implement the file edits directly. Do not return a checklist-only response.

Required Variables

• service_symbol
• module_path
• create_method
• cancel_method

Required Output Contract

1. Write tests/test_core_service.py.
2. Import datetime from datetime, create_autospec from unittest.mock, pytest, and CoreService from services.core_service.
3. Define a fixed_check_in fixture that returns datetime(2024, 1, 1, 12, 0, 0).
4. Define test_create_record_returns_confirmed_status(fixed_check_in).
5. In that test:

• instantiate service = CoreService()
• instantiate notifier = create_autospec(object, spec_set=True)
• include a visible # Act comment immediately before the service call
• call service.create_record(display_name="Alice", check_in=fixed_check_in, check_out=datetime(2024, 1, 3, 12, 0, 0))
• assert result["status"] == "confirmed"
• assert notifier.mock_calls == []

6. Define test_cancel_record_returns_cancelled_status().
7. In that test:

• instantiate service = CoreService()
• include a visible # Act comment immediately before the service call
• call service.cancel_record(record_id="abc-123")
• assert result["status"] == "cancelled"

8. Preserve the exact test names above and keep one behavior per test.

Guardrails

• No unittest.TestCase in pytest-style tasks.
• No real clock/random dependencies in deterministic tests.
• Do not add extra helper abstractions or additional tests beyond the required contract.