write-unit-tests

Create comprehensive unit tests for current code with proper imports/setup per project testing conventions.

1. Test Coverage: Test all public methods/functions, cover edge cases/error conditions, test positive/negative scenarios, aim for high coverage
2. Test Structure: Use project's testing framework conventions, write clear descriptive test names, follow Arrange-Act-Assert pattern, group related tests logically
3. Test Cases: Happy path scenarios, edge cases/boundary conditions, error handling/exception cases, mock external dependencies appropriately
4. Test Quality: Make tests independent/isolated, ensure deterministic/repeatable, keep simple/focused, add helpful assertion messages