unit-test-writer

Unit test generation uses AAA structure (Arrange-Act-Assert) to scaffold comprehensive tests with mocking and coverage targets. This Skill produces test files following pytest for Python and Jest for JavaScript, with explicit benchmarks: ≥80% overall coverage, ≥90% for critical logic, 100% for error paths, and ≥85% for utilities.

TDD test structure follows AAA organization with proper naming conventions, fixture patterns, and mock setups tailored to Python and JavaScript. This Skill generates template test skeletons that enforce functional requirements and guide workflow from code analysis through test file creation.

Yes. This Skill targets both new code and existing modules needing coverage improvement. It generates maintainable tests with mocking strategies and coverage guidance, helping you reach and exceed minimum benchmarks across error paths and critical logic sections.

Unit test generation supports multi-language codebases, including Python with pytest and JavaScript/TypeScript with Jest. Each framework receives language-specific naming conventions, fixture patterns, and mocking strategies aligned to its ecosystem.

This Skill provides explicit coverage benchmarks: overall ≥80%, critical logic ≥90%, error paths 100%, and utilities ≥85%. It categorizes code sections by risk and scaffolds tests with these targets built in, automating the decision of where to focus testing effort.