# Task ID: 34

**Title:** Write Unit Tests for Services Layer

**Status:** done

**Dependencies:** 6, 13, 15, 17, 19, 24, 32

**Priority:** high

**Description:** Create comprehensive unit tests for all service classes with mocked dependencies.

**Details:**

Create tests in `tests/unit/services/`:

`test_auth_service.py`: login flows (cert/secret), token caching, refresh, logout, status.

`test_tenant_service.py`: list/switch/add/remove tenants, connection testing.

`test_location_service.py`: list/search/validate locations, staleness warnings, missing CSV.

`test_user_service.py`: list with filters, search, resolve (including ambiguous names), pagination.

`test_number_service.py`: list/search numbers, assign/unassign with polling, E911 validation, number format conversion.

`test_policy_service.py`: list from CSV, validate policy, assign via API.

Target: >90% coverage for services layer.

**Test Strategy:**

Run `pytest tests/unit/services/ --cov=teams_phone.services --cov-report=term-missing` and verify >90% coverage.

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## Completion Notes (2026-01-30)

Tests were written incrementally during feature development rather than as a separate phase. All service classes now have comprehensive unit tests located in `tests/unit/` (flat structure, not `tests/unit/services/`).

### Coverage Results (Target: >90%)

| Component | Coverage | Status |
|-----------|----------|--------|
| auth_service.py | 95% | ✅ Exceeds |
| tenant_service.py | 100% | ✅ Exceeds |
| location_service.py | 98% | ✅ Exceeds |
| user_service.py | 98% | ✅ Exceeds |
| number_service.py | 100% | ✅ Exceeds |
| policy_service.py | 99% | ✅ Exceeds |
| bulk_operations.py | 97% | ✅ Exceeds |

### Test Files Created

- `tests/unit/test_auth_service.py` - Login flows, token caching, refresh, logout
- `tests/unit/test_tenant_service.py` - List/switch/add/remove tenants, connection testing
- `tests/unit/test_location_service.py` - List/search/validate, staleness warnings
- `tests/unit/test_user_service.py` - List with filters, search, resolve (ambiguous names)
- `tests/unit/test_number_service.py` - List/search, assign/unassign with polling
- `tests/unit/test_policy_service.py` - List from CSV, validate, assign via API
- `tests/unit/test_bulk_operations.py` - Bulk assignment validation and execution

### Additional CLI Tests

Beyond service tests, comprehensive CLI layer tests were also created:
- `test_cli_auth.py`, `test_cli_tenants.py`, `test_cli_users.py`
- `test_cli_locations.py`, `test_cli_numbers.py`, `test_cli_policies.py`
- `test_cli_main.py`, `test_cli_api_check.py`

### Test Suite Summary

- **Total tests**: 1,139
- **Pass rate**: 100%
- **Overall coverage**: 94%
