testing-patterns SKILL.md skillA
testing-patterns from svngoku/coding-agents-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add svngoku/coding-agents-skills/testing-patterns@git:20260813.4b33420Pins git:20260813.4b33420 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- svngoku/coding-agents-skills
- Path
skills/testing-patterns/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260813.4b33420, committed Aug 13, 2026
- Size
- 12,105 bytes
- Repository stars
- 12
- License
- MIT
Plan, write, and maintain automated tests in any language, with worked examples in Python and JavaScript/TypeScript. Use this skill whenever the user wants to write or plan tests, apply TDD (red-green-refactor), structure unit tests with arrange-act-assert and given-when-then naming, choose between fakes, stubs, and mocks, set up dependency injection for testability, build integration tests with testcontainers, database seeding, or transaction rollback, write Playwright or Cypress end-to-end…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Testing Patterns Automated tests are how a codebase stays safe to change. This language-agnostic skill tells you what to test, where each test belongs, and how to keep the suite fast and reliable — with worked examples in Python (pytest, Hypothesis, factory_boy, testcontainers) and JavaScript/TypeScript (Vitest, Jest, fast-check, Playwright). ## Quick Reference | Task | Reference | |------|-----------| | pytest fixtures & parametrization, factory_boy, Hypothesis, coverage.py, mutmut | [python-testing.md](references/python-testing.md) | | Vitest/Jest mocking, fast-check, Playwright config & selectors, testcontainers-node | [js-ts-testing.md](references/js-ts-testing.md) | | CI parallelization, flaky-test triage, rerun policies, quarantine | [flaky-tests-ci.md](references/flaky-tests-ci.md) | ## Test Pyramid Many fast, isolated unit tests at the bottom; fewer slower integration tests in the middle; a handful of slow, brittle end-to-end tests at the top. | Layer | Scope | Speed | Typical count | Catches | |-------|-------|-------|---------------|---------| | Unit | one function/class | ms | hundreds+ | logic errors, edge cases | …
Read the whole file at its exact version.
How to install
mdr add svngoku/coding-agents-skills/testing-patterns@sha256:0bba2c368e822df4The line at the top of this page pins the label git:20260813.4b33420, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_c7qppbeaijiaidgw)
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Versions
The registry has recorded 1 version of this file, committed on Aug 13, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (12105 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
svngoku/coding-agents-skills · 12 stars · license MIT · pushed 2026-10-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_c7qppbeaijiaidgw GET https://markdownregistry.com/api/v1/resolve?ref=svngoku/coding-agents-skills/testing-patterns GET https://markdownregistry.com/api/v1/blob/0bba2c368e822df401f9b218c0f38caaa34afd36966ed7a98caf9c9ae885f0a3
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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