Add Tests

Workflow

1. •Identify the target package under packages/:
   • •General-purpose helpers -> packages/utils
   • •Browser-only APIs -> packages/web-utils
   • •Node-only APIs -> packages/node-utils
   • •Canvas helpers -> packages/canvas-utils
   • •AI/ML helpers -> packages/ai-utils
2. •Find or create a test file in packages/<pkg>/__tests__/.
3. •Follow the naming pattern:
   • •describe('functionName', () => { it('should ...') })
4. •Cover at least:
   • •Common expected behavior
   • •Edge cases / boundary values
   • •Error or invalid input behavior (if applicable)
5. •Use deterministic inputs and avoid external I/O unless required.
6. •Suggest running focused tests:
   • •TEST_API=<package> npm run test