# Edge Case Test Implementation Summary
This document summarizes the comprehensive edge case test files created for document processing.
## Test Files Created
### 1. test_malformed_documents.py (8 test methods)
Tests for handling invalid syntax, corrupted files, and encoding issues:
- `test_invalid_yaml_frontmatter` - Invalid YAML in markdown frontmatter
- `test_incomplete_code_blocks` - Unclosed code blocks in markdown
- `test_binary_content_in_text` - Binary data embedded in text files
- `test_corrupted_file_encoding` - Mixed/corrupted encodings
- `test_excessively_nested_structure` - Deeply nested document structures
- `test_invalid_file_permissions` - Files with permission issues
- `test_circular_references` - Documents with circular references
- `test_truncated_file` - Incomplete/truncated files
### 2. test_document_edge_cases.py (8 test methods)
Tests for empty docs, huge files, deep nesting, and circular refs:
- `test_empty_document` - Completely empty files
- `test_whitespace_only_document` - Files with only whitespace
- `test_huge_file_processing` - Very large files (10MB+)
- `test_single_line_extreme_length` - Files with extremely long lines
- `test_deeply_nested_sections` - Documents with deep section nesting
- `test_circular_include_references` - Circular include references
- `test_mixed_line_endings` - Files with mixed line endings (CRLF/LF/CR)
- `test_file_with_no_extension` - Files without file extensions
### 3. test_unicode_documents.py (8 test methods)
Tests for various encodings, emoji, RTL languages, and special chars:
- `test_emoji_content` - Documents with emoji and emoticons
- `test_rtl_languages` - Right-to-left languages (Arabic, Hebrew, Persian)
- `test_cjk_characters` - Chinese, Japanese, and Korean text
- `test_mathematical_symbols` - Mathematical notation and symbols
- `test_various_encodings` - UTF-16, Latin-1, Windows-1252 encodings
- `test_bom_handling` - Byte Order Mark handling
- `test_control_characters` - Control characters and special Unicode
- `test_unicode_normalization` - Unicode normalization forms (NFC/NFD)
### 4. test_document_error_recovery.py (8 test methods)
Tests for graceful degradation, partial recovery, and error reporting:
- `test_partial_markdown_recovery` - Recovery from partially corrupted markdown
- `test_encoding_fallback_chain` - Fallback through multiple encodings
- `test_memory_limit_handling` - Processing with memory constraints
- `test_interrupted_processing_recovery` - Recovery from interrupted processing
- `test_filesystem_error_handling` - Handling filesystem errors
- `test_malformed_structure_recovery` - Recovery from malformed structure
- `test_plugin_fallback_mechanism` - Fallback to generic processing
- `test_error_reporting_detail_levels` - Different error reporting levels
## Key Features Tested
### Robustness
- Handles corrupted and malformed files gracefully
- Recovers partial content when possible
- Falls back to alternative processing methods
- Reports errors with appropriate detail levels
### Unicode Support
- Supports multiple text encodings
- Handles emoji and special Unicode characters
- Processes RTL and CJK languages correctly
- Manages Unicode normalization
### Performance
- Handles large files efficiently
- Uses streaming for memory-constrained environments
- Processes files with extreme characteristics (long lines, deep nesting)
### Error Recovery
- Continues processing after encountering errors
- Provides detailed error information
- Implements fallback mechanisms
- Handles system-level errors (filesystem, memory)
## Usage
Run all edge case tests:
```bash
pytest tests/test_malformed_documents.py tests/test_document_edge_cases.py tests/test_unicode_documents.py tests/test_document_error_recovery.py -v
```
Run specific test categories:
```bash
# Malformed documents
pytest tests/test_malformed_documents.py -v
# Edge cases
pytest tests/test_document_edge_cases.py -v
# Unicode handling
pytest tests/test_unicode_documents.py -v
# Error recovery
pytest tests/test_document_error_recovery.py -v
```
