Datason Test Structure - Organized & Maintainable¶

✅ Proper Approach: Function-Level Organization¶

Instead of deleting whole files, we extract unique test functions and organize them logically.

Current Clean Structure¶

🎯 tests/unit/ - Main Functionality Tests¶

tests/unit/
├── test_api_comprehensive.py          # API functions (dump, load, etc.)
├── test_config_comprehensive.py       # Configuration management  
├── test_core_comprehensive.py         # Core serialization (main functionality)
├── test_deserializers_comprehensive.py # Deserialization (main functionality)
├── test_serializers_comprehensive.py  # Serializers module
├── test_validation_comprehensive.py   # Validation helpers
├── test_converters_comprehensive.py   # Type converters
└── test_data_utils_comprehensive.py   # Data utilities

🔧 tests/coverage/ - Edge Cases & Coverage Boosters¶

tests/coverage/
├── test_core_edge_cases.py           # ⭐ NEW: Import failures, object edge cases
├── test_advanced_features_boost.py   # Advanced feature paths
├── test_datetime_coverage_boost.py   # DateTime edge cases
├── test_focused_coverage_boost.py    # Focused coverage improvements
└── test_*.py                         # Other specialized coverage tests

🔗 tests/integration/ - Multi-Module Tests¶

tests/integration/
├── test_round_trip_serialization.py  # Serialize → Deserialize testing
├── test_config_and_type_handlers.py  # Configuration integration
└── test_*.py                         # Other integration scenarios

📋 Rules: Where to Add New Tests¶

✅ Add to tests/unit/ when:¶

Testing main functionality of a module
Testing happy path scenarios
Testing standard parameter variations
Testing basic error handling

Example: Adding a new serialization method

# Add to tests/unit/test_core_comprehensive.py
def test_serialize_new_type(self):
    """Test serialization of new type."""

✅ Add to tests/coverage/ when:¶

Testing import failure scenarios
Testing exception handling edge cases
Testing boundary conditions
Testing performance optimization paths
Targeting specific uncovered lines

Example: Testing edge case for coverage improvement

# Add to tests/coverage/test_core_edge_cases.py
def test_new_import_failure_path(self):
    """Test fallback when new_module import fails."""
    # Target specific lines for coverage

✅ Add to tests/integration/ when:¶

Testing multiple modules together
Testing real-world usage scenarios
Testing end-to-end workflows

📊 Coverage Results¶

Maintained 74% coverage while cleaning up structure
Eliminated 71% of duplicates (134→39 duplicate instances)
Reduced files by 30% but preserved all unique functionality

🎯 Key Benefits¶

1. Clear Decision Making¶

❓ Need to increase core serialization coverage?
✅ Check tests/unit/test_core_comprehensive.py first
✅ Add edge cases to tests/coverage/test_core_edge_cases.py

❓ Testing new API functionality?
✅ Add to tests/unit/test_api_comprehensive.py

❓ Testing import failure edge case?
✅ Add to tests/coverage/test_core_edge_cases.py

2. No More Duplicate Creation¶

Before: "I need to test X, I'll create test_X_boost.py"
After: "I need to test X, I'll add to the appropriate existing file"

3. Maintainable Coverage Growth¶

Edge cases: Always go to /coverage/ directory
Main functionality: Always go to /unit/ directory
Integration: Always go to /integration/ directory

🚀 Example: Adding New Coverage¶

If you want to increase datason/core.py coverage:

Check current: tests/unit/test_core_comprehensive.py
Add edge cases: tests/coverage/test_core_edge_cases.py
Add integration: tests/integration/test_*_integration.py

Never create: test_core_coverage_boost_v2.py ❌

✅ Success Metrics Achieved¶

74% coverage maintained
Clear structure: Know exactly where to add tests
No duplication: Each test function in exactly one logical place
Easy maintenance: Find and modify tests quickly