deterministic-service-test

name	deterministic-service-test
description	Write deterministic service tests with stable fixtures and boundary mocks without using jig.

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.