Testing

Skill byerlikaya/claude-starter-kit/claude-starter/skills/testing

The how of testing: pyramid, AAA, isolation, risk coverage, determinism. Guarantees the DoD's "tests are green". test-expert-csk applies it. Trigger phrases: "write a test", "run the tests", "coverage", "are the tests green", "unit test", "integration test"From its SKILL.md

Install

npx -y skills add byerlikaya/claude-starter-kit --skill testing

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

One thing to look at

22 stars22 stars. Stars are a popularity signal and not a quality one, but at this level it is likely that nobody has read this closely except its author, and you would be relying on your own review.

SKILL.md

1.4 KB, 259 tokens by cl100k_base, as published. Nobody here has run it

Testing Discipline

Goal: behavior correctness — test real behavior without breaking product code just to make a test pass.

Principles

Pyramid: many unit, fewer integration, few end-to-end (e2e). Limit e2e to critical flows.
AAA: Arrange-Act-Assert; one test = one behavior.
Isolation & determinism: external dependencies are mocked/faked; time and randomness are fixed; test order is independent.
Risk-coverage: risk, not metrics. Critical path + boundary + negative + authorization (IDOR/404) scenarios.
Naming: what_it_tests_under_which_condition_what_it_expects — on failure it is clear what broke.
Red-green: first a failing test, then the implementation.

Watch out

Flaky = bug: an occasionally failing test is not tolerated; it is fixed at the root.
In snapshot/golden-file tests, avoid needless brittleness (assert only the meaningful output).

DoD (this skill's contribution)

The relevant test command is green (e.g. dotnet test); critical paths are covered; no empty/meaningless tests.

What ships with it

Read from the repository

Just SKILL.md. No reference files, no scripts.