Test building block catalog — typed patterns for Storybook play-function tests, Vitest hook tests, Vitest unit tests, MSW handlers, and test data fixtures.
$ npx skills add bartstc/vite-ts-react-template --skill test-building-blocks -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install bartstc/vite-ts-react-template test-building-blocks --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/bartstc/vite-ts-react-template.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/test-building-blocks .claude/skills/test-building-blocks && rm -rf skills-srcUse ~/.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/
Install the "test-building-blocks" agent skill from https://github.com/bartstc/vite-ts-react-template/tree/core/.agents/skills/test-building-blocks into .claude/skills/test-building-blocks/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-building-blocks", 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 install https://github.com/bartstc/vite-ts-react-template/tree/core/.agents/skills/test-building-blocksType 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.
$ npx skills add bartstc/vite-ts-react-template --skill test-building-blocks -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install bartstc/vite-ts-react-template test-building-blocks --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/bartstc/vite-ts-react-template.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/test-building-blocks .agents/skills/test-building-blocks && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "test-building-blocks" agent skill from https://github.com/bartstc/vite-ts-react-template/tree/core/.agents/skills/test-building-blocks into .agents/skills/test-building-blocks/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-building-blocks", 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.
$ npx skills add bartstc/vite-ts-react-template --skill test-building-blocks -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install bartstc/vite-ts-react-template test-building-blocks --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/bartstc/vite-ts-react-template.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/test-building-blocks .cursor/skills/test-building-blocks && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "test-building-blocks" agent skill from https://github.com/bartstc/vite-ts-react-template/tree/core/.agents/skills/test-building-blocks into .cursor/skills/test-building-blocks/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-building-blocks", 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 https://github.com/bartstc/vite-ts-react-template.git --path .agents/skills/test-building-blocks--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add bartstc/vite-ts-react-template --skill test-building-blocks -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install bartstc/vite-ts-react-template test-building-blocks --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/bartstc/vite-ts-react-template.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/test-building-blocks .gemini/skills/test-building-blocks && rm -rf skills-srcUse ~/.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/
Install the "test-building-blocks" agent skill from https://github.com/bartstc/vite-ts-react-template/tree/core/.agents/skills/test-building-blocks into .gemini/skills/test-building-blocks/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-building-blocks", 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.
$ gh skill install bartstc/vite-ts-react-template test-building-blocksInstalls 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).
$ npx skills add bartstc/vite-ts-react-template --skill test-building-blocks -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/bartstc/vite-ts-react-template.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/test-building-blocks .github/skills/test-building-blocks && rm -rf skills-srcUse ~/.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/
Install the "test-building-blocks" agent skill from https://github.com/bartstc/vite-ts-react-template/tree/core/.agents/skills/test-building-blocks into .github/skills/test-building-blocks/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-building-blocks", 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.
$ npx skills add bartstc/vite-ts-react-template --skill test-building-blocks -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install bartstc/vite-ts-react-template test-building-blocks --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/bartstc/vite-ts-react-template.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/test-building-blocks .opencode/skills/test-building-blocks && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "test-building-blocks" agent skill from https://github.com/bartstc/vite-ts-react-template/tree/core/.agents/skills/test-building-blocks into .opencode/skills/test-building-blocks/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-building-blocks", 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.
test-building-blocksTest building block catalog — typed patterns for Storybook play-function tests, Vitest hook tests, Vitest unit tests, MSW handlers, and test data fixtures.
Test Building Blocks is an agent skill from bartstc/vite-ts-react-template. Test building block catalog — typed patterns for Storybook play-function tests, Vitest hook tests, Vitest unit tests, MSW handlers, and test data fixtures. Read the relevant rule file before writing or modifying any test, handler, or fixture. Covers: deciding which kind of test to write, authoring a new test from scratch, adding MSW mocks or fixtures, and reviewing existing tests for conformance.
Its SKILL.md is about 1.5k tokens, which your agent loads only when the skill is triggered. The skill folder holds 8 other files (for example `README.md`, `metadata.json` and `rules/component-story-test.md`).
It sits in Testing & QA, covering Unit testing and Test data and fixtures. It works with Vitest, Storybook, React and TanStack. The repository describes itself as: This project provides a basic dev setup intended for Single Page Application (SPA) development. It contains key tools, settings for seamless DX, and an demo app presenting good… The licence is MIT.
4 steps, taken from the first numbered list in SKILL.md.
Read from SKILL.md and the folder at commit 6aa5c9c. It shows what the files ask for, not the result of running them.
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.
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Test Building Blocks loads about 1.5k tokens when it runs. Until then it costs about 105 tokens; SKILL.md has 632 words of instructions outside code blocks.
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.
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.
The full file from bartstc/vite-ts-react-template at commit 6aa5c9c, republished under its MIT licence (© bartstc). 632 words, ~1,545 tokens.
.claude/skills/test-building-blocks/SKILL.md (or your agent's skills folder). This skill also uses 7 other files; get the full folder from GitHub.Typed catalog of test-related building blocks used in this project. Each block has a fixed name, layer, composition rules, and canonical example.
Read the rule file for each block you are about to implement. The summaries below are for routing — the rule files contain the full pattern.
Typical flow:
rules/{block-name}.md for the full pattern and canonical example.The project's testing philosophy allocates verification across three layers:
renderHook) cover custom hooks that need dedicated verification — edge cases, error paths, loading states, and hooks with logic not tied to a single component. Use independently of component-story-test; the two do not need to cover the same ground.Coverage is behavior-covered, not file-mapped. Every user-observable state has a story or a hook-test scenario; not every file has a test.
Mock at the network boundary, not the module boundary. MSW is the default for anything HTTP-backed. Do not mock lib/api/ exports, React Query, or Zustand stores — let the real code run and intercept at the wire.
Module-level mocking (vi.mock, vi.stubGlobal) is reserved for:
Date.now, crypto.randomUUID, Math.random, timers.test-lib/.machine.provide({ actors, actions }).Rationale: mocking lib/api/ wrappers hides the bugs most likely to ship (wrong query key, wrong select, stale-time issues, cache collisions). MSW keeps the real wiring under test and only fakes the external world.
| Block | Layer | Summary | File |
|---|---|---|---|
component-story-test | co-located .stories.tsx | Storybook play-function test verifying user-facing behavior. Primary verification layer for rendered components. | rules/component-story-test.md |
hook-test | co-located .test.tsx | Vitest test using renderHook for custom hooks — edge cases, error/loading paths, cross-component hooks. | rules/hook-test.md |
unit-test | co-located .test.ts(x) | Vitest test for non-hook mechanics — mappers, transformers, value objects, selectors, pure functions. | rules/unit-test.md |
| Block | Layer | Summary | File |
|---|---|---|---|
msw-handler | test-lib/handlers/ | One request handler per endpoint with optional resolver for per-scenario overrides. Shared across tests and stories. | rules/msw-handler.md |
fixture | test-lib/fixtures/ | Deterministic test data factory via createFixture<T>(). Supplies toStructure, createPermutation, createCollection. | rules/fixture.md |
Decide in this order:
component-story-test. Covers the happy path and main user-observable states. Mutation hooks, Zustand stores, XState machines, context providers composed by the component are exercised transitively.hook-test. Use for hooks whose edge cases, error branches, or loading states are awkward to reproduce through component UI, or for hooks used by multiple components where duplicating scenarios per component is wasteful.unit-test. Mappers, transformers, value objects, selectors, date math, query-keys factories.For support code:
msw-handler. One factory per endpoint; resolver at call site for per-scenario overrides.fixture. Domain type in, factory out. No randomness, no Date.now().Do not write tests for: fixtures, MSW handler factories, trivial glue (re-exports, constants, pass-through hooks).
rules/ — one file per block.© bartstc, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
SKILL.md and 7 other files in .agents/skills/test-building-blocks of bartstc/vite-ts-react-template.
Open the folder on GitHubat commit 6aa5c9c
Test Building Blocks 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Test Building Blocks this skillbartstc/vite-ts-react-template | 122 | — | ~1.5k | Automated safety check: Pass | MIT | |
| Check Visual Changesigrlk/storybook-addon-test-codegen | 154 | 1 repos | ~1.4k | Automated safety check: Pass | MIT | |
| Effect TStellahq/opensession | 392 | — | ~3.7k | Automated safety check: Pass | MIT | |
| Data Client React Testingreactive/data-client | 2k | — | ~1.5k | Automated safety check: Pass | Apache-2.0 | |
| LobeHub Testing Guidelobehub/lobehub | 83k | — | ~1.6k | Automated safety check: Pass | Custom licence | |
| Menu Testing Ssrasmyshlyaev177/react-horizontal-scrolling-menu | 790 | — | ~3.5k | Automated safety check: Pass | MIT |
igrlk/storybook-addon-test-codegen
Check the visual impact of an edit mid-task with uiverify check — render just the components you're touching on the UI Verify fleet and diff them against the real CI baseline, without opening a PR…
tellahq/opensession
Write idiomatic Effect v4 TypeScript verified against the pinned effect@4.0.0-rc.112 source.
reactive/data-client
Test @data-client/react with renderDataHook and mountDataClient - jest unit tests, fixtures, interceptors, MockResolver, mock responses, nock HTTP mocking, fake timers for polling/subscription…
lobehub/lobehub
Explains how to write and run Vitest tests in the LobeHub monorepo: single-file commands, mocking rules, database model tests and regression tests for fixes.
asmyshlyaev177/react-horizontal-scrolling-menu
Server rendering and testing for react-horizontal-scrolling-menu: the library is client-only ('use client' required in React Server Components, else "createContext is not a function"), SSR first…
yusifeng/formax
Implement or refactor Formax tool transcript UI using the Tool UI Blocks (C-lite) pattern (ToolUiBlocks renderer + blocks presenters) to avoid touching many tool presenter files; use when adjusting…
bartstc/vite-ts-react-template
Create production-ready GitHub Actions workflows for automated testing, building, and deploying applications.
bartstc/vite-ts-react-template
Create high-quality git commits: review/stage intended changes, split into logical commits, and write clear commit messages (including Conventional Commits).
bartstc/vite-ts-react-template
A skill your agent uses when creating page objects or refactoring Playwright E2E tests for better maintainability with Page Object Model patterns.
bartstc/vite-ts-react-template
Collaboratively write a feature spec with the developer. An agent skill from bartstc/vite-ts-react-template.
bartstc/vite-ts-react-template
Explains code with visual diagrams and analogies. An agent skill from bartstc/vite-ts-react-template.
bartstc/vite-ts-react-template
Frontend building block catalog — typed patterns for components, hooks, queries, mutations, stores, and models.
Categories
Test building block catalog — typed patterns for Storybook play-function tests, Vitest hook tests, Vitest unit tests, MSW handlers, and test data fixtures. Test Building Blocks is an agent skill from bartstc/vite-ts-react-template. Test building block catalog — typed patterns for Storybook play-function tests, Vitest hook tests, Vitest unit tests, MSW handlers, and test data fixtures.
Test Building Blocks fits situations like: tasks that involve Unit testing; tasks that involve Test data and fixtures.
Run `npx skills add bartstc/vite-ts-react-template --skill test-building-blocks -a claude-code`. Or copy the skill folder (.agents/skills/test-building-blocks in bartstc/vite-ts-react-template) into .claude/skills/test-building-blocks in your project. Claude Code loads it when a task matches its description.
Run `npx skills add bartstc/vite-ts-react-template --skill test-building-blocks -a codex`. Or copy the skill folder (.agents/skills/test-building-blocks in bartstc/vite-ts-react-template) into .agents/skills/test-building-blocks in your project. Codex loads it when a task matches its description.
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add bartstc/vite-ts-react-template --skill test-building-blocks -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/test-building-blocks, .gemini/skills/test-building-blocks, .github/skills/test-building-blocks and .opencode/skills/test-building-blocks in your project.
SKILL.md names no scripts, command-line tools or credentials: Test Building Blocks is instructions for the agent only.
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
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.
Test Building Blocks is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
About 1.5k tokens (SKILL.md is roughly 6.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
Skills that share tags, products or a category with Test Building Blocks: Check Visual Changes (igrlk/storybook-addon-test-codegen, 154 stars), Effect TS (tellahq/opensession, 392 stars), Data Client React Testing (reactive/data-client, 2k stars) and LobeHub Testing Guide (lobehub/lobehub, 83k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
bartstc (a GitHub user) maintains it in bartstc/vite-ts-react-template, which has 122 GitHub stars. The repository holds 7 skills in this directory. The repository was last updated on October 6, 2026.
Source: bartstc/vite-ts-react-template on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.
