spec-gen-write-tests

Spec-aligned test generation works by reading implementation code and spec contracts together to produce framework-specific test files. This ensures assertions verify real behavior using GIVEN/WHEN/THEN semantics instead of placeholder stubs.

Yes, this test generation approach works with Vitest, Jest, pytest, Go test, and CTest/GTest. It detects the local test framework and generates matching test files with appropriate annotations and conventions.

Yes, you can use it for TypeScript, JavaScript, Python, Go, and C++ codebases. It detects the language test framework, reads implementations and spec contracts, and generates framework-specific test files accordingly.

To write tests that follow local project conventions without placeholder assertions, the skill reads existing test patterns and enforces rules such as mocking only system boundaries. It iteratively runs tests to diagnose failures and reports coverage changes.

Yes, you need an existing spec-gen analysis cache for orientation. The skill requires this cache to read spec contracts and implementation details before generating framework-specific test files.

Limitations of automated spec-aligned test generation include the requirement for an existing spec-gen analysis cache and the restriction to mock only system boundaries. It cannot generate tests for code lacking spec contracts or implementation files.