Write unit tests for memory_manager and contradiction_agent

[blackboxprogramming]

Description

The memory_manager and contradiction_agent modules provide essential functionality for Lucidia but currently lack automated tests. Adding unit tests will ensure stability as new features are added.

Proposed work

• Create a tests/ directory in the Lucidia repository and set up pytest as the test runner.
• Write tests for the MemoryManager class:
  • Verify that load_memory returns an empty dictionary when the memory file does not exist or contains malformed JSON.
  • Test that save_memory persists data correctly and that MemoryManager.get, set, and delete operations work as expected.
• Write tests for the ContradictionAgent class:
  • Confirm that analyze appends contradictions to the list and writes them to contradictions.json.
  • Test list_contradictions and clear_contradictions to ensure they return and clear the stored contradictions appropriately.
• Use fixtures or temporary directories to isolate file I/O during tests so that the real memory files are not affected.

Acceptance criteria

• Running pytest in the Lucidia repository executes all tests and they pass without errors.
• Tests cover both typical and edge-case behaviors for memory loading/saving and contradiction logging/clearing.
• Tests run in an isolated environment without modifying existing memory or contradiction files.
• A brief README or comment explains how to run the tests.