test-runner

name	test-runner
description	Write and run tests across languages — scaffolding, execution, and coverage. Use when the user mentions tests, testing, coverage, TDD, or wants to verify code correctness.
version	1.0.0
license	MIT
compatibility	Requires language-specific test framework (jest, pytest, go test, etc.)
metadata	{"author":"hermeshub","hermes":{"tags":["testing","jest","pytest","unit-tests","coverage","tdd"],"category":"development","requires_tools":["terminal"]}}

Test Runner

Multi-language test scaffolding, execution, and analysis.

When to Use

• User wants to write tests for existing code
• User asks to run a test suite
• User wants coverage analysis
• User practices TDD and needs test scaffolding

Procedure

1. Detect language and testing framework
2. Analyze the code under test
3. Generate test cases covering:
   • Happy path (expected behavior)
   • Edge cases (empty input, null, boundaries)
   • Error cases (invalid input, exceptions)
4. Run the test suite
5. Report results and coverage

Supported Frameworks

Language	Framework	Run Command
JavaScript/TS	Jest	npx jest
Python	Pytest	python -m pytest
Go	go test	go test ./...
Rust	cargo test	cargo test

Test Patterns

• Arrange-Act-Assert for unit tests
• Given-When-Then for behavior tests
• Table-driven tests for parameterized cases
• Mock external dependencies

Pitfalls

• Don't test implementation details, test behavior
• Mock external services, don't hit real APIs
• Clean up test fixtures after each test
• Watch for flaky tests (timing, ordering)

Verification

• All tests pass
• Coverage meets threshold (aim for 80%+)
• No flaky tests on repeated runs