Implement Comprehensive Tests for All Service Layer Files

[alexxkara]

📜 Description

Create unit tests for each service file in the project to ensure reliability and correctness of the service layer. The tests should cover core functionality, edge cases, and error handling for each service.

🔍 Requirements

• Test Coverage: Ensure that each function in the service files has full test coverage, including:
  • Standard use cases
  • Edge cases for inputs and outputs
  • Proper handling of expected errors and exceptions
• Assertions: Verify that all outputs and side effects match expected results, maintaining strict adherence to the expected behavior.
• Mocking Dependencies: Use mocks or stubs as needed for dependencies to isolate each service and focus tests on its logic.

🚀 Automation

• CI Integration: Integrate tests with the CI pipeline to automate testing during each build, providing immediate feedback on potential issues.

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📝 Documentation Requirements

• Document the testing setup and provide instructions for running the tests.
• Include guidelines for adding new tests for future service functions.

Implementing this will ensure robust service functionality and prevent regressions during future updates.