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CodeRabbit Generated Unit Tests: Add tests for download, vault OAuth2, CLI; add TEST_SUMMARY.md #15

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302 changes: 302 additions & 0 deletions TEST_SUMMARY.md
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# Unit Test Summary for databusclient

## Overview
Comprehensive unit tests have been generated for the new download capabilities and vault authentication features introduced in the `download-capabilities` branch.

## Test Coverage Summary

### Files Modified/Created
1. **tests/test_download.py** - Extended with 938 new lines (from 20 to 958 lines)
2. **tests/test_cli.py** - New file created with 562 lines of comprehensive CLI tests

### Total Test Coverage
- **Total Lines of Test Code**: 1,620 lines
- **New Tests Added**: ~80+ test functions
- **Test Categories**: 5 major categories

---

## Detailed Test Coverage

### 1. URL Parsing and ID Extraction Tests (`test_download.py`)

#### `__get_databus_id_parts__` Function Tests
- ✅ Full URI parsing with all components
- ✅ URI without protocol prefix
- ✅ Group-level URIs (no artifact/version)
- ✅ Artifact-level URIs (no version)
- ✅ Handling trailing slashes
- ✅ HTTP vs HTTPS protocol handling
- ✅ Empty string handling
- ✅ Host-only URIs

**Purpose**: Ensures proper parsing of databus URIs into host, account, group, artifact, version, and file components.

---

### 2. JSON-LD Parsing Tests (`test_download.py`)

#### `__handle_databus_artifact_version__` Tests
- ✅ Single file in artifact version
- ✅ Multiple files in artifact version
- ✅ No Part nodes (empty results)
- ✅ Empty graph handling
- ✅ Missing 'file' field in Part nodes
- ✅ Malformed JSON handling

#### `__get_databus_latest_version_of_artifact__` Tests
- ✅ Single version extraction
- ✅ Multiple versions (lexicographic sorting)
- ✅ No versions error handling
- ✅ Missing @id field handling
- ✅ Malformed JSON handling

#### `__get_databus_artifacts_of_group__` Tests
- ✅ Single artifact extraction
- ✅ Multiple artifacts extraction
- ✅ Filtering artifacts with versions
- ✅ No artifacts handling
- ✅ Missing @id field handling
- ✅ Malformed JSON handling

**Purpose**: Validates JSON-LD parsing for databus metadata structures.

---

### 3. Vault Authentication Tests (`test_download.py`)

#### `__get_vault_access__` Function Tests
- ✅ Audience extraction from URLs (parametrized for multiple URL formats)
- ✅ Loading refresh token from file
- ✅ Loading refresh token from environment variable
- ✅ File not found error handling
- ✅ Complete OAuth token exchange flow
- ✅ HTTP error handling
- ✅ Short token warning
- ✅ Token exchange with different grant types

#### `__download_file__` with Authentication Tests
- ✅ Download flow with 401 authentication required
- ✅ Bearer WWW-Authenticate header detection
- ✅ ValueError when vault token not provided
- ✅ Redirect following (302, 307, etc.)
- ✅ Directory structure creation

**Purpose**: Ensures vault authentication and OAuth token exchange work correctly for protected downloads.

---

### 4. Download Function Tests (`test_download.py`)

#### Core Download Functionality
- ✅ Endpoint validation (raises error when None for queries)
- ✅ Collection URI handling
- ✅ JSON-LD fetching from databus
- ✅ Multiple bindings error in SPARQL results

#### Integration Points
- ✅ Directory creation for nested paths
- ✅ Redirect handling in HEAD requests
- ✅ Content-length header parsing

**Purpose**: Tests the main download orchestration logic.

---

### 5. CLI Command Tests (`test_cli.py`)

#### Deploy Command Tests (20+ tests)
- ✅ Basic deployment with all required options
- ✅ Missing required option error handling
- ✅ No distributions error handling
- ✅ Single distribution deployment
- ✅ Multiple distributions deployment
- ✅ Correct parameter passing to client functions
- ✅ Special characters in parameters
- ✅ Exception handling from client

#### Download Command Tests (25+ tests)
- ✅ Basic URI download
- ✅ Custom local directory option
- ✅ Custom databus endpoint option
- ✅ Vault token file option
- ✅ All vault authentication options
- ✅ Default auth values
- ✅ Multiple URIs
- ✅ SPARQL query as argument
- ✅ No URIs error handling
- ✅ Collection URI download
- ✅ Mixed URI types (artifact, collection, file)
- ✅ All options combined
- ✅ Empty optional parameters
- ✅ Token without auth params (uses defaults)
- ✅ Exception handling from client

#### CLI Structure Tests (10+ tests)
- ✅ App has expected commands
- ✅ Deploy command help text
- ✅ Download command help text
- ✅ App help shows description
- ✅ Deploy/download workflow
- ✅ Command isolation

**Purpose**: Validates Click CLI interface, option parsing, and command execution.

---

## Test Quality Features

### 1. **Mocking Strategy**
- Uses `pytest.fixture` for test runner setup
- Mocks external dependencies (requests, SPARQLWrapper)
- Uses `monkeypatch` for environment variable and filesystem mocking
- Captures function calls to verify behavior

### 2. **Edge Case Coverage**
- Empty inputs
- Malformed data
- Missing required fields
- HTTP errors
- File system errors
- Protocol variations

### 3. **Parametrized Tests**
- URL/audience extraction tested with multiple URL formats
- Reduces code duplication
- Improves test maintainability

### 4. **Error Handling**
- Tests for all expected exceptions
- Validates error messages
- Tests exception propagation

### 5. **Integration-Like Tests**
- Deploy then download workflow
- Command isolation verification
- End-to-end flow testing

---

## Testing Best Practices Applied

1. **Descriptive Test Names**: Every test has a clear, descriptive name indicating what it tests
2. **Docstrings**: Each test includes a docstring explaining its purpose
3. **Arrange-Act-Assert Pattern**: Tests follow AAA pattern for clarity
4. **Isolation**: Each test is independent and doesn't rely on others
5. **Mock External Dependencies**: Network calls and file I/O are mocked
6. **Comprehensive Coverage**: Happy paths, edge cases, and error conditions
7. **Fixture Usage**: Shared setup logic in fixtures
8. **Parametrization**: Reduces duplication for similar test cases

---

## Running the Tests

### Run All Tests
```bash
pytest tests/
```

### Run Specific Test File
```bash
pytest tests/test_download.py
pytest tests/test_cli.py
```

### Run Specific Test
```bash
pytest tests/test_download.py::test_get_databus_id_parts_full_uri
pytest tests/test_cli.py::test_deploy_command_basic
```

### Run with Coverage
```bash
pytest --cov=databusclient tests/
```

### Run with Verbose Output
```bash
pytest -v tests/
```

---

## Key Features Tested

### New Download Capabilities
1. **Multi-level Databus URI Support**
- File-level downloads
- Version-level downloads
- Artifact-level downloads (latest version)
- Group-level downloads (all artifacts)
- Collection downloads

2. **Vault Authentication**
- OAuth2 token exchange flow
- Refresh token management
- Bearer token authentication
- Audience extraction for multi-tenant support

3. **Enhanced Download Logic**
- Redirect following
- WWW-Authenticate header detection
- Automatic endpoint detection
- Directory structure creation

4. **CLI Improvements**
- Typer to Click migration
- New vault authentication options
- Optional local directory (auto-creates structure)
- Default authentication values

---

## Test Execution Expectations

### Expected Behavior
- All tests should pass on the `download-capabilities` branch
- Tests use mocking to avoid external dependencies
- No actual network calls are made during testing
- No files are created outside of pytest's tmp_path

### Dependencies Required
- pytest (^7.1.3) - Already in pyproject.toml
- click - Already in pyproject.toml
- Standard library unittest.mock

### Potential Issues
1. Some tests may need adjustment if private function names change
2. Tests assume specific error messages - may need updates if messages change
3. Mocking strategy may need updates if implementation details change significantly

---

## Future Test Enhancements

### Potential Additions
1. **Performance Tests**: Test download speed and memory usage
2. **Stress Tests**: Test with many concurrent downloads
3. **Security Tests**: Test token security and validation
4. **Integration Tests**: Test with actual databus endpoints (marked as integration)
5. **Property-Based Tests**: Use hypothesis for property-based testing
6. **Mutation Tests**: Use mutation testing to verify test quality

### Areas for Expansion
1. More comprehensive error message validation
2. Tests for retry logic (if implemented)
3. Tests for progress bar display
4. Tests for logging output
5. Tests for caching mechanisms (if implemented)

---

## Conclusion

This comprehensive test suite provides:
- **Wide Coverage**: 80+ tests covering all new functionality
- **Edge Case Handling**: Tests for error conditions and boundary cases
- **Maintainability**: Clear, well-documented tests following best practices
- **Fast Execution**: All external dependencies mocked for speed
- **Confidence**: Thorough validation of vault authentication and download features

The tests ensure that the new download capabilities and vault authentication work correctly across various scenarios, providing a solid foundation for continued development.
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