Implement tests for singleton decorator

[kivancbeser]

Add tests for singleton decorator functionality including basic instance equality, reset behavior, and thread safety.

Overview

This PR adds comprehensive unit tests for the singleton decorator located in src/providers/singleton.py. While the core logic was partially covered by indirect usage, these dedicated tests ensure that the singleton pattern remains robust as the project grows.

Type of change

• Bug fix
• New feature
• Documentation improvement
• Bounty issue submission
• Other: Test Coverage Improvement

Changes

• Created tests/providers/test_singleton_provider.py.

• Added test_singleton_basic_functionality to verify instance equality.

• Added test_singleton_reset to verify the instance clearing mechanism.

• Added test_singleton_thread_safety using the threading module to ensure the decorator is safe for concurrent access (race condition prevention).

Checklist

• Code complies with style guidelines
• Self-review completed
• Documentation updated (if applicable)
• Local testing completed
• Tests added/updated (if applicable)

Impact

This change has no risk to the existing codebase as it only adds test files. It improves the reliability of the singleton utility, which is a foundational component used across various providers in OM1.

Additional Information

Local test results:
collected 3 items
tests/providers/test_singleton_provider.py ... [100%]
============================== 3 passed in 0.11s ==============================

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

📢 Thoughts on this report? Let us know!

[Wanbogang]

@kivancbeser
Please take a look and fix the test errors

[kivancbeser]

@kivancbeser Please take a look and fix the test errors

Fixed