Issue 25: SDK Test Suite

[laraibg786]

Goal

Create a comprehensive test suite for the Python SDK covering unit tests (parsing, error mapping, state machine) and integration tests (end-to-end workflows against the local API), with >90% coverage.

Requirements

Functional

• Unit Tests (50+): Client initialization, retry logic, error mapping, state machine transitions, callback firing.
• Integration Tests (20+ scenarios): Full activation flow, heartbeat loop, grace mode, revocation, offline simulation.
• Fixtures: Mocked API responses, deterministic test data, offline simulation helpers.
• Coverage: >90% line coverage enforced in CI.

Technical

• Framework: pytest + pytest-asyncio + respx (for mocking httpx).
• CI: Tests run in GitHub Actions on every push.
• Markers: @pytest.mark.unit and @pytest.mark.integration.

Acceptance Criteria

• All unit tests pass without a running API.
• All integration tests pass against a local Docker Compose stack.
• Coverage report shows >90%.
• CI runs both suites on every push.

Dependencies

• Blocked by: Issue 23: Python SDK Core Client #23, Issue 24: SDK Heartbeat Loop and State Machine #24.
• Blocks: Issue 27: SDK Demo Application #27 (Demo App).