Add comprehensive testing for rules package

[blink-so-v1]

This PR adds comprehensive testing for the rules package, ensuring robust URL pattern matching and rule evaluation.

📊 Coverage Improvement

Adds extensive test coverage for the rules package including pattern matching, rule parsing, and evaluation logic.

🧪 Key Improvements

Rule Matching Edge Cases

• ✅ Empty URL with wildcard patterns
• ✅ Domain-only URL matching without protocols
• ✅ HTTP/HTTPS protocol handling
• ✅ URLs with and without paths
• ✅ Port number handling (localhost:8080)
• ✅ Method restrictions with case sensitivity
• ✅ Uppercase/lowercase method normalization

Rule Parsing Robustness

• ✅ Whitespace handling in rule specifications
• ✅ Empty and invalid rule detection
• ✅ Mixed case HTTP method parsing
• ✅ Empty method handling in comma-separated lists
• ✅ Tab and multiple space separators
• ✅ Pattern-only rules (without method restrictions)

Wildcard Pattern Matching

• ✅ Complex patterns with multiple stars (*api*v*)
• ✅ Patterns longer than text strings
• ✅ Multiple consecutive wildcards (***)
• ✅ Stars at beginning and end of patterns
• ✅ Empty pattern and text handling
• ✅ Performance optimization to prevent exponential backtracking

Rule Engine Evaluation

• ✅ Empty and nil rule lists
• ✅ First-match rule precedence
• ✅ Method-restricted vs. general rules
• ✅ Rule result formatting with proper messages
• ✅ Logger integration with suppressed test output

Specification Parsing

• ✅ Nil input handling
• ✅ Empty strings in rule lists
• ✅ Whitespace-only specifications
• ✅ Large rule set handling (1000+ rules)
• ✅ Mixed valid and invalid rule processing

Performance & Security

• ✅ Complex pattern performance testing
• ✅ Prevention of exponential regex backtracking
• ✅ Reasonable time bounds for pattern matching
• ✅ Stress testing with long patterns and text

🔧 Real-World Integration

GitHub Pattern Testing

• ✅ *.github.com matching api.github.com but not github.com
• ✅ github.com/* matching paths but not bare domain
• ✅ Complex API URL patterns (*/api/*)

URL Processing

• Real URL parsing with protocols and paths
• Domain extraction and matching
• Path-based rule evaluation
• Query parameter handling

🚀 Benefits

1. Security: URL filtering logic is thoroughly validated
2. Performance: Pattern matching optimized to prevent DoS
3. Reliability: Edge cases and malformed input handled gracefully
4. Maintainability: Clear test structure enables safe rule engine changes
5. Quality Assurance: Real-world patterns tested against actual URLs

Developer Experience

• Comprehensive edge case documentation through tests
• Performance benchmarks for optimization guidance
• Clear examples of expected rule behavior
• Integration test patterns for common use cases

All tests pass successfully with excellent performance characteristics and comprehensive coverage of the rules evaluation pipeline.

Co-authored-by: f0ssel [email protected]