# Test Report — P2-3: Commands und Statusmaschinen Phase 1

## Task
Implement Command Pattern for Contacts domain + State Machine for Contact and Workflow entities.

## Files Created
- `app/commands/__init__.py` — Command package init
- `app/commands/base.py` — CommandResult + BaseCommand (template method pattern)
- `app/commands/contact_commands.py` — Create/Update/Delete/Merge contact commands
- `app/core/state_machine.py` — Generic StateMachine + Contact/Workflow state definitions
- `tests/test_commands.py` — Tests for all commands and state machine

## Files Modified
- `app/routes/contacts.py` — Routes now use Commands instead of direct service calls
- `app/models/contact.py` — Added `status` field for state machine
- `app/schemas/contact.py` — Added `status` field to ContactCreate/ContactUpdate/ContactResponse

## Test Results

### State Machine Tests
- ✅ `test_can_transition_allowed` — valid transitions return True
- ✅ `test_can_transition_disallowed` — invalid transitions return False
- ✅ `test_transition_success` — valid transition returns new state
- ✅ `test_transition_invalid_raises` — invalid transition raises StateMachineError
- ✅ `test_transition_unknown_state_raises` — unknown state raises StateMachineError
- ✅ `test_workflow_state_machine_transitions` — workflow transitions correct
- ✅ `test_custom_state_machine` — custom transitions work

### CommandResult Tests
- ✅ `test_ok_result` — ok() creates successful result
- ✅ `test_ok_with_events` — ok() with events
- ✅ `test_fail_result` — fail() creates failed result

### CreateContactCommand Tests
- ✅ `test_create_contact_admin_success` — admin creates contact, audit + outbox event
- ✅ `test_create_contact_viewer_denied` — viewer denied
- ✅ `test_create_contact_with_invalid_status` — invalid status rejected

### UpdateContactCommand Tests
- ✅ `test_update_contact_admin_success` — admin updates contact, audit + outbox event
- ✅ `test_update_contact_not_found` — not found error
- ✅ `test_update_contact_viewer_denied` — viewer denied

### DeleteContactCommand Tests
- ✅ `test_soft_delete_contact_admin_success` — soft delete works, audit created
- ✅ `test_hard_delete_contact_admin_success` — hard delete works, event enqueued
- ✅ `test_delete_contact_not_found` — not found error
- ✅ `test_delete_contact_viewer_denied` — viewer denied

### MergeContactsCommand Tests
- ✅ `test_merge_contacts_admin_success` — merge works, audit + outbox event
- ✅ `test_merge_same_contact_fails` — self-merge rejected
- ✅ `test_merge_contacts_viewer_denied` — viewer denied
- ✅ `test_merge_contact_not_found` — not found error

## Compilation Check
`python -m py_compile` on all new/modified files.

## Smoke Test
Commands execute correctly when called directly with AsyncSession and Redis client.
State machine validates transitions and raises on invalid attempts.