Comprehensive data validation and error handling tests #8
Description
Overview
Add comprehensive tests for data validation, error handling, and edge cases in memcord core.
Part of Epic #1: Testing & Maintainability Enhancement
Test Scenarios Needed
Data Validation
- Corrupted JSON files (invalid syntax)
- Missing required fields (slot_name, entries, created_at, updated_at)
- Invalid data types (entries as string instead of list)
- Malformed timestamps (invalid ISO format)
- Corrupted entry structure (missing type, content, timestamp)
Edge Cases
- Empty slots (no entries)
- Very large content (entries with 10MB+ content)
- Unicode content handling (emoji, international characters)
- Duplicate entries (same timestamp and content)
- Out of order timestamps (chronological validation)
Metadata Scenarios
- Slots with tags array
- Slots with group_path organization
- Archived slots (is_archived: true)
- Various priority values
File System
- Permissions errors (read/write failures)
- Disk full scenarios
- Concurrent access handling
Success Criteria
- 80%+ coverage on storage.py and models.py
- All error conditions handled gracefully
- Clear error messages for users