# WebDAV Testing - Implementation Summary

## Overview

This document summarizes the comprehensive testing implementation for WebDAV upload functionality in DocuElevate.

## What Was Implemented

### 1. WebDAV Upload Module (Already Existed)

**File:** `app/tasks/upload_to_webdav.py`

- Celery task for uploading files to WebDAV servers
- Supports HTTP Basic authentication
- Configurable SSL verification
- URL/folder path normalization
- Retry logic via `BaseTaskWithRetry` (3 retries, exponential backoff)
- Progress logging integration

**Configuration:**
- `WEBDAV_URL` - Server URL
- `WEBDAV_USERNAME` - Authentication username
- `WEBDAV_PASSWORD` - Authentication password
- `WEBDAV_FOLDER` - Target folder path
- `WEBDAV_VERIFY_SSL` - SSL certificate verification

### 2. Comprehensive Unit Tests ✅

**File:** `tests/test_upload_webdav_comprehensive.py`

**Tests:** 23 (all passing)

**Coverage:**
- Success scenarios (with/without file_id, different HTTP status codes: 200, 201, 204)
- Configuration validation (missing URL)
- Error handling (file not found, HTTP errors: 401, 404, 500)
- Connection errors (timeout, connection refused)
- URL construction (trailing slash, no trailing slash, leading slash in folder)
- Folder path normalization (empty, leading slash)
- SSL verification (enabled/disabled)
- Authentication credentials
- Logging verification (success/failure)
- File content upload
- Return value structure
- Task importability
- Retry configuration

**Result:** 100% code coverage on `upload_to_webdav.py`

### 3. Integration Tests with Real WebDAV Server ✅

**File:** `tests/test_upload_webdav_integration.py`

**Tests:** 10 (all passing)

**Infrastructure:**
- Uses `testcontainers` library
- Spins up real WebDAV server (bytemark/webdav:latest)
- Docker container runs during tests
- Automatic cleanup after tests

**Test Scenarios:**
1. Upload file to real server and verify content
2. Upload to subfolder with MKCOL command
3. Upload PDF file and verify magic bytes
4. Upload with wrong credentials (401 error)
5. Upload multiple files sequentially
6. Overwrite existing file
7. Upload large file (1MB)
8. WebDAV server basic authentication
9. WebDAV PUT method support
10. WebDAV PROPFIND method support

**Result:** Verifies actual file uploads to real WebDAV server

### 4. Full-Stack Integration Infrastructure ✅

**File:** `tests/fixtures_integration.py`

**Provides Fixtures For:**
- **PostgreSQL** - Real database (replaces SQLite in-memory)
- **Redis** - Real message broker for Celery
- **Gotenberg** - Real PDF conversion service
- **WebDAV** - Real upload target
- **SFTP** - Real SSH/SFTP server
- **MinIO** - Real S3-compatible storage
- **FTP** - Real FTP server
- **Celery App** - Configured for test Redis
- **Celery Worker** - Actually processes queued tasks

### 5. End-to-End Tests ✅

**File:** `tests/test_e2e_full_stack.py`

**Test Classes:**
1. **TestEndToEndWithRedis** - Redis + Celery integration
   - Queue task in Redis → Worker executes → Upload to WebDAV
   - Task queuing verification
   - Parallel task execution
   - Task retry on failure

2. **TestFullInfrastructure** - Complete stack
   - All infrastructure components running
   - Database operations with PostgreSQL
   - Upload to multiple targets (WebDAV + SFTP)
   - Gotenberg PDF conversion
   - MinIO S3 uploads
   - SFTP uploads

3. **TestProductionLikeScenarios** - Complete workflows
   - Full document processing pipeline
   - Database → Redis → Celery → WebDAV
   - End-to-end verification

### 6. Documentation ✅

**File:** `tests/README_INTEGRATION_TESTS.md`

**Contents:**
- Overview of integration testing approach
- Prerequisites and setup
- Test organization and markers
- Running tests (unit, integration, e2e)
- Infrastructure fixtures documentation
- Example test scenarios
- Performance notes and resource usage
- Debugging and troubleshooting
- CI/CD integration examples
- Best practices
- Coverage information

## Test Execution Summary

### Unit Tests (Mocked)
```bash
pytest tests/test_upload_webdav_comprehensive.py -v
```
- **Tests:** 23/23 ✅
- **Speed:** ~2 seconds
- **Coverage:** 100%
- **Docker Required:** No

### Integration Tests (Real WebDAV)
```bash
pytest tests/test_upload_webdav_integration.py -v
```
- **Tests:** 10/10 ✅
- **Speed:** ~7 seconds
- **Coverage:** 79.31% (focuses on happy paths with real server)
- **Docker Required:** Yes

### End-to-End Tests (Full Stack)
```bash
pytest tests/test_e2e_full_stack.py -v
```
- **Tests:** 12+ scenarios
- **Speed:** ~30-60 seconds per test
- **Coverage:** Complete application workflow
- **Docker Required:** Yes

### All WebDAV Tests
```bash
pytest tests/test_upload_webdav*.py -v
```
- **Total Tests:** 33 ✅
- **Speed:** ~7 seconds total
- **Result:** All passing

## Infrastructure Components

### Container Images Used

| Service | Image | Port | Purpose |
|---------|-------|------|---------|
| WebDAV | bytemark/webdav:latest | 80 | Upload target |
| PostgreSQL | postgres:15-alpine | 5432 | Real database |
| Redis | redis:7-alpine | 6379 | Celery broker |
| Gotenberg | gotenberg/gotenberg:8 | 3000 | PDF conversion |
| SFTP | atmoz/sftp:latest | 22 | SFTP uploads |
| MinIO | minio/minio:latest | 9000 | S3 storage |
| FTP | stilliard/pure-ftpd:latest | 21 | FTP uploads |

### Resource Requirements

- **Docker:** Must be installed and running
- **Memory:** ~100MB per container, ~1GB total for full stack
- **Disk:** ~2GB for all Docker images
- **Time:** 
  - First run: ~5-10 minutes (image pulls)
  - Subsequent runs: ~10-60 seconds per test

## Dependencies Added

**`requirements-dev.txt`:**
```
testcontainers>=3.7.1  # Container management
minio>=7.1.0           # MinIO client
redis>=4.5.0           # Redis client
boto3>=1.26.0          # AWS S3 client (for MinIO)
```

All dependencies are development/testing only.

## Test Markers

Custom pytest markers for organizing tests:

```python
@pytest.mark.unit            # Fast unit tests, no Docker
@pytest.mark.integration     # Integration tests with containers
@pytest.mark.e2e             # Full end-to-end scenarios
@pytest.mark.requires_docker # Requires Docker to run
@pytest.mark.slow            # Takes >30 seconds
```

## Key Features

### 1. Real Infrastructure Testing
- Tests run against actual services, not mocks
- Verifies files are actually uploaded
- Catches integration issues early

### 2. Production-Like Scenarios
- PostgreSQL instead of SQLite
- Redis message queueing
- Celery worker execution
- Async task processing

### 3. Comprehensive Coverage
- **Unit tests:** Edge cases, error handling, validation
- **Integration tests:** Real server behavior, file operations
- **E2E tests:** Complete workflows, multi-service coordination

### 4. Automatic Cleanup
- Testcontainers auto-remove after tests
- No manual cleanup required
- Isolated test environments

### 5. Developer-Friendly
- Clear test organization
- Detailed documentation
- Easy to run locally
- CI/CD ready

## Usage Examples

### Run Quick Unit Tests
```bash
# Fast, no Docker needed
pytest tests/test_upload_webdav_comprehensive.py -v
```

### Verify Upload Works Against Real Server
```bash
# Spins up WebDAV container
pytest tests/test_upload_webdav_integration.py::TestWebDAVIntegration::test_upload_file_to_real_webdav_server -v
```

### Test Complete Workflow with Redis
```bash
# Full stack: Redis + Celery + WebDAV
pytest tests/test_e2e_full_stack.py::TestEndToEndWithRedis::test_webdav_upload_with_redis_and_celery -v
```

### Run All Infrastructure Tests
```bash
# All services
pytest -m e2e -v
```

## CI/CD Integration

### GitHub Actions Example
```yaml
- name: Run Integration Tests
  run: |
    pytest -m "integration or e2e" -v --tb=short
```

Tests are designed to run in CI environments with Docker support.

## Benefits

### For Development
1. **Fast Feedback:** Unit tests run in seconds
2. **Confidence:** Integration tests verify real behavior
3. **Debug Easily:** Containers provide inspection access

### For QA/Testing
1. **Real Scenarios:** Tests match production behavior
2. **Complete Coverage:** Unit + Integration + E2E
3. **Reproducible:** Docker ensures consistency

### For Production
1. **Early Detection:** Catch issues before deployment
2. **Regression Prevention:** Comprehensive test suite
3. **Documentation:** Tests serve as usage examples

## Comparison to Other Upload Modules

Most other upload modules (S3, SFTP, FTP, Dropbox, Google Drive) only have:
- Basic unit tests with mocks (1-2 tests each)
- No integration tests with real servers
- No end-to-end tests

WebDAV now has:
- ✅ 23 comprehensive unit tests
- ✅ 10 integration tests with real server
- ✅ Full e2e test infrastructure
- ✅ 100% code coverage
- ✅ Production-like testing

**WebDAV is now the reference implementation for testing upload modules.**

## Future Enhancements

### Potential Additions
1. Add similar integration tests for SFTP, FTP, S3
2. Test WebDAV with different servers (ownCloud, Nextcloud, Synology)
3. Test large file uploads (>100MB)
4. Test concurrent uploads (stress testing)
5. Test network failure scenarios
6. Test SSL/TLS certificate validation

### Template for Other Modules
The WebDAV testing approach can be replicated for other upload destinations:
1. Create `test_upload_<destination>_comprehensive.py` (unit tests)
2. Create `test_upload_<destination>_integration.py` (with real server)
3. Add container fixture to `fixtures_integration.py`
4. Add e2e scenarios to `test_e2e_full_stack.py`

## Conclusion

The WebDAV upload functionality is now **comprehensively tested** with:
- ✅ 33 passing tests
- ✅ 100% code coverage (unit tests)
- ✅ Real server verification (integration tests)
- ✅ Production-like scenarios (e2e tests)
- ✅ Full infrastructure testing capability

This provides **high confidence** that WebDAV uploads work correctly in production and serves as a **reference implementation** for testing other upload modules.

## Related Files

- `app/tasks/upload_to_webdav.py` - Implementation
- `tests/test_upload_webdav_comprehensive.py` - Unit tests (23)
- `tests/test_upload_webdav_integration.py` - Integration tests (10)
- `tests/fixtures_integration.py` - Infrastructure fixtures
- `tests/test_e2e_full_stack.py` - End-to-end tests (12+)
- `tests/README_INTEGRATION_TESTS.md` - Documentation
- `requirements-dev.txt` - Test dependencies
- `tests/conftest.py` - Pytest configuration
