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React Testing Patterns

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hieutrtr·vlatest·frontend

Helps with React, testing, patterns as part of building frontend UIs and user experiences workflows.

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  1. 1

    Run this in your project

    terminal
    $ npx skills add hieutrtr/ai1-skills --skill react-testing-patterns -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

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hieutrtr

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Live repository

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Automated safety checks

scanned

This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.

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    SKILL.md parses and declares a name and a description.

    SKILL.md exists, its frontmatter parses, and it declares a name and a description.

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    Scanned hieutrtr/ai1-skills at d8244c1acd.

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Commit
d8244c1acd
Manifest
skills/react-testing-patterns/SKILL.md
Scanned
4 files, 804 lines
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About this skill

What it does

This skill provides guidance and best practices for writing tests for React components. It emphasizes testing component behavior rather than implementation details, promoting a philosophy of accessibility and realistic user interaction through techniques like userEvent. The skill also covers testing custom hooks, mocking API calls with MSW, handling asynchronous state changes, and auditing component accessibility using jest-axe.

When to use it

  • Writing unit tests for React components, including rendering, interactions, and accessibility checks.
  • Testing custom hooks using renderHook.
  • Setting up test infrastructure like providers and utility functions.
  • Mocking API calls within your component tests.
  • Verifying asynchronous state updates (e.g., loading states).

Key capabilities

  • Testing Library Philosophy: Prioritizes testing behavior over implementation details using specific query methods (getByRole, getByLabelText, etc.).
  • User Interaction Simulation: Encourages the use of userEvent for realistic user interaction simulation instead of low-level event dispatching.
  • Accessibility Testing: Integrates with jest-axe to audit component accessibility.
  • Component Test Structure: Promotes an Arrange → Act → Assert testing structure.

Example prompts

  • "How should I test a React component's interaction using the recommended approach?"
  • "What is the preferred method for querying elements in my React tests?"
  • "Can you provide guidance on mocking API calls when writing React component tests?"

Tips & gotchas

  • Avoid Testing Implementation: Focus on testing observable behavior, not internal state or CSS.
  • Prioritize Queries: Use getByRole and getByLabelText before resorting to getByTestId.
  • Use userEvent: Simulate user interactions realistically by using userEvent instead of fireEvent.