Agent skill

Testing

by TheBeardedBearSAS in TheBeardedBearSAS/claude-craft

TDD/BDD testing principles. An agent skill from TheBeardedBearSAS/claude-craft.

MITAuto-check passedTesting & QA

Install Testing

skills CLI

$ npx skills add TheBeardedBearSAS/claude-craft --skill testing -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install TheBeardedBearSAS/claude-craft testing --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/TheBeardedBearSAS/claude-craft.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/testing .claude/skills/testing && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "testing" agent skill from https://github.com/TheBeardedBearSAS/claude-craft/tree/main/.claude/skills/testing into .claude/skills/testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "testing", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/TheBeardedBearSAS/claude-craft/tree/main/.claude/skills/testing

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add TheBeardedBearSAS/claude-craft --skill testing -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install TheBeardedBearSAS/claude-craft testing --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/TheBeardedBearSAS/claude-craft.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/testing .agents/skills/testing && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "testing" agent skill from https://github.com/TheBeardedBearSAS/claude-craft/tree/main/.claude/skills/testing into .agents/skills/testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "testing", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add TheBeardedBearSAS/claude-craft --skill testing -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install TheBeardedBearSAS/claude-craft testing --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/TheBeardedBearSAS/claude-craft.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/testing .cursor/skills/testing && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "testing" agent skill from https://github.com/TheBeardedBearSAS/claude-craft/tree/main/.claude/skills/testing into .cursor/skills/testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "testing", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/TheBeardedBearSAS/claude-craft.git --path .claude/skills/testing

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add TheBeardedBearSAS/claude-craft --skill testing -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install TheBeardedBearSAS/claude-craft testing --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/TheBeardedBearSAS/claude-craft.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/testing .gemini/skills/testing && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "testing" agent skill from https://github.com/TheBeardedBearSAS/claude-craft/tree/main/.claude/skills/testing into .gemini/skills/testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "testing", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install TheBeardedBearSAS/claude-craft testing

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add TheBeardedBearSAS/claude-craft --skill testing -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/TheBeardedBearSAS/claude-craft.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/testing .github/skills/testing && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "testing" agent skill from https://github.com/TheBeardedBearSAS/claude-craft/tree/main/.claude/skills/testing into .github/skills/testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "testing", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add TheBeardedBearSAS/claude-craft --skill testing -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install TheBeardedBearSAS/claude-craft testing --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/TheBeardedBearSAS/claude-craft.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/testing .opencode/skills/testing && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "testing" agent skill from https://github.com/TheBeardedBearSAS/claude-craft/tree/main/.claude/skills/testing into .opencode/skills/testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "testing", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: testing
GitHub stars: 107
Token cost: ~887 tokens
SKILL.md length: 164 words
Files: 3
Skills in repo: 12
Repo updated: Sep 14, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

TDD/BDD testing principles. An agent skill from TheBeardedBearSAS/claude-craft.

Reviewing test coverage
SKILL.md covers Principes fondamentaux, Outils recommandés 2026 and Stratégies 2026
Calls npx
Setting up testing

What it does

Testing is an agent skill from TheBeardedBearSAS/claude-craft. TDD/BDD testing principles. Use when writing tests, reviewing test coverage, setting up testing, or discussing test strategy and test architecture.

Its SKILL.md is about 890 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `README.md` and `REFERENCE.md`).

It sits in Testing & QA, covering Test coverage, Test-driven development and Unit testing. It works with Vitest and Playwright. The repository describes itself as: Supercharge Claude Code with Expert Knowledge A comprehensive framework for AI-assisted development. Install standardized rules, agents, and commands for your projects across… The licence is MIT.

When your agent uses it

Reviewing test coverage
Setting up testing
Discussing test strategy and test architecture

Example prompts

“/testing”

Requirements

Node.js

What it can do on your machine

Read from SKILL.md and the folder at commit 99c1ee3. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- npx
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
- vitest.dev
- pestphp.com
- stryker-mutator.io
- fast-check.dev
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Testing loads about 887 tokens when it runs. Until then it costs about 39 tokens; SKILL.md has 164 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~39
When it runs · the whole SKILL.md, loaded when a task matches: ~887

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from TheBeardedBearSAS/claude-craft at commit 99c1ee3, republished under its MIT licence (© TheBeardedBearSAS). 164 words, ~887 tokens.

Download SKILL.mdSave it as .claude/skills/testing/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.

name: testing
description: TDD/BDD testing principles. Use when writing tests, reviewing test coverage, setting up testing, or discussing test strategy and test architecture.
context: fork files: ["**/tests/**", "**/test/**", "**/__tests__/**", "**/spec/**", "*.test.*", "*.spec.*", "*Test*.*", "*_test.*"]

Testing - Principes TDD/BDD (2026)

Principes universels de testing pour toutes les technologies du framework Claude-Craft.

Principes fondamentaux

TDD Cycle: RED → GREEN → REFACTOR
Couverture cible: >= 80%
Pyramide: Unit (70%) > Integration (20%) > E2E (10%)
Pattern: Arrange-Act-Assert (AAA)
Nommage: Tests descriptifs expliquant le comportement

Outils recommandés 2026

Stack	Unit/Composants	E2E/Browser	Mutation Testing
JS/TS/React	Vitest 4.1+ (Browser Mode stable)	Playwright	Stryker
PHP/Laravel/Symfony	Pest 4.5+ (PHPUnit 12, Browser Testing)	Playwright via Pest	Infection
Python	pytest 8.x + Ruff 0.8+	Playwright	Mutmut
Flutter	flutter_test + bloc_test 10+	Patrol 3.13+	built-in
React Native	RNTL + Jest	Detox/Maestro	Stryker

Sources : Vitest 4, Pest 4, Stryker Mutator

Stratégies 2026

Vitest 4 — Browser Mode stable

Abandonner JSDOM lourd. Chromium/Firefox/WebKit natifs.

typescript

// vitest.config.ts
export default defineConfig({
  test: {
    browser: {
      enabled: true,
      name: 'chromium', // ou 'firefox', 'webkit'
      provider: 'playwright',
    },
  },
});

Source : Vitest Browser Mode

Mutation Testing — "Coverage ment, mutation scores disent la vérité"

Tester la qualité des tests. Mutation score >= 80%.

bash

# Stryker (JS/TS/C#)
npx stryker run

# Infection (PHP)
vendor/bin/infection --min-msi=80

# Mutmut (Python)
mutmut run

Source : Stryker Mutator

Property-based Testing

Générer des tests à partir de propriétés invariantes.

typescript

// fast-check (JS/TS)
import fc from 'fast-check';

test('sorting preserves all elements', () => {
  fc.assert(
    fc.property(fc.array(fc.integer()), (arr) => {
      const sorted = [...arr].sort();
      return sorted.length === arr.length;
    })
  );
});

Source : fast-check

Pest 4 — Browser Testing intégré

php

// Pest 4.5+ avec Playwright natif
test('user can login', function () {
    $this->browse(function (Browser $browser) {
        $browser->visit('/login')
            ->type('email', 'alice@example.com')
            ->type('password', 'secret')
            ->press('Login')
            ->assertPathIs('/dashboard');
    });
});

Source : Pest 4 Browser Testing

Vitest Workspaces — Monorepos

typescript

// vitest.workspace.ts
export default defineWorkspace([
  'packages/*/vitest.config.ts', // Unit tests
  {
    test: {
      browser: { enabled: true, name: 'chromium' },
      include: ['e2e/**/*.test.ts'],
    },
  }, // Browser tests
]);

Source : Vitest Workspaces

Voir @.claude/references/base/testing.md pour documentation complète.

Files

SKILL.md and 2 other files in .claude/skills/testing of TheBeardedBearSAS/claude-craft.

SKILL.md
README.md
REFERENCE.md

Open the folder on GitHubat commit 99c1ee3

Compare with similar skills

Testing next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Testing compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Testing this skillTheBeardedBearSAS/claude-craft	107	—	~887	Automated safety check: Pass	MIT	23 days ago
Web Testing with Playwright and Vitestwithkynam/vibecode-pro-max-kit	1.1k	—	~892	Automated safety check: Pass	Apache-2.0	3 mo ago
Dotnet Testingnovotnyllc/dotnet-artisan	233	—	~972	Automated safety check: Pass	MIT	1 mo ago
Senior QAalirezarezvani/claude-skills	28k	1 repos	~2.1k	Automated safety check: Pass	MIT	1 mo ago
Sanity Visual Regressionsanity-io/sanity	6.4k	—	~3.4k	Automated safety check: Pass	MIT	today
Vue Testing Best PracticesJetBrains/skills	363	7 repos	~563	Automated safety check: Pass	MIT	3 mo ago

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Questions about Testing

What does Testing do?

TDD/BDD testing principles. An agent skill from TheBeardedBearSAS/claude-craft. Testing is an agent skill from TheBeardedBearSAS/claude-craft. TDD/BDD testing principles.

When should I use Testing?

Testing fits situations like: reviewing test coverage; setting up testing; discussing test strategy and test architecture.

How do I install Testing in Claude Code?

Run `npx skills add TheBeardedBearSAS/claude-craft --skill testing -a claude-code`. Or copy the skill folder (.claude/skills/testing in TheBeardedBearSAS/claude-craft) into .claude/skills/testing in your project. Claude Code loads it when a task matches its description.

How do I install Testing in Codex?

Run `npx skills add TheBeardedBearSAS/claude-craft --skill testing -a codex`. Or copy the skill folder (.claude/skills/testing in TheBeardedBearSAS/claude-craft) into .agents/skills/testing in your project. Codex loads it when a task matches its description.

Can I use Testing in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add TheBeardedBearSAS/claude-craft --skill testing -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/testing, .gemini/skills/testing, .github/skills/testing and .opencode/skills/testing in your project.

What does Testing need to run?

Going by SKILL.md and its folder, Testing needs the command-line tools its instructions call (npx). Our summary lists: Node.js.

Does Testing access the network?

SKILL.md names 4 domains. As links in the text: vitest.dev, pestphp.com, stryker-mutator.io and fast-check.dev. This is read from the text; nothing was executed.

Is Testing safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Testing use?

Testing is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Testing use?

About 887 tokens (SKILL.md is roughly 3.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Testing?

Skills that share tags, products or a category with Testing: Web Testing with Playwright and Vitest (withkynam/vibecode-pro-max-kit, 1.1k stars), Dotnet Testing (novotnyllc/dotnet-artisan, 233 stars), Senior QA (alirezarezvani/claude-skills, 28k stars) and Sanity Visual Regression (sanity-io/sanity, 6.4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Testing?

TheBeardedBearSAS (a GitHub organization) maintains it in TheBeardedBearSAS/claude-craft, which has 107 GitHub stars. The repository holds 12 skills in this directory. The repository was last updated on September 14, 2026.

Source: TheBeardedBearSAS/claude-craft on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Testing

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Testing - Principes TDD/BDD (2026)

Principes fondamentaux

Outils recommandés 2026

Stratégies 2026

Vitest 4 — Browser Mode stable

Mutation Testing — "Coverage ment, mutation scores disent la vérité"

Property-based Testing

Pest 4 — Browser Testing intégré

Vitest Workspaces — Monorepos

Files

Compare with similar skills

Similar skills

More from TheBeardedBearSAS/claude-craft

Related

Questions about Testing