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Javascript Testing Patterns

Checked
lifangda·vlatest·backend·MIT

Helps with JavaScript, testing, patterns as part of developing backend services and APIs workflows.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add lifangda/claude-plugins --skill javascript-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.

What we know about this skill

Publisher

lifangda

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Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

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.

  • Declares what it does: passed

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

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

  • No undeclared network calls: passed

    Makes no network calls.

    Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.

  • No obfuscated payloads: passed

    No encoded or obfuscated payloads.

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  • No credential access: passed

    Reads no keys, tokens, keychains or credential files.

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  • No pipe-to-shell installers: passed

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  • Pinned to a commit: passed

    Scanned lifangda/claude-plugins at 76d90e8304.

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Commit
76d90e8304
Manifest
cli-tool/skills-library/javascript-typescript/javascript-testing-patterns/SKILL.md
Scanned
6 files, 2,477 lines
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About this skill

What it does

This skill provides guidance and code examples for applying common JavaScript testing patterns. It helps developers write more maintainable, readable, and robust tests using techniques like mocking, spying, and test doubles. The goal is to improve the quality of JavaScript projects by ensuring thorough and effective unit testing practices.

When to use it

  • When you need help writing unit tests for a complex JavaScript function or module.
  • To learn best practices for mocking dependencies in your tests.
  • For guidance on implementing test doubles (stubs, spies, mocks) effectively.
  • When refactoring existing tests to improve their clarity and maintainability.

Key capabilities

  • Guidance on using mocking frameworks.
  • Examples of spying on function calls for testing purposes.
  • Demonstration of creating and utilizing test doubles.
  • Explanation of common JavaScript testing patterns.

Example prompts

  • "Show me an example of how to mock a third-party API call in my Jest tests."
  • "How can I spy on a function to verify it was called with specific arguments?"
  • “Explain the difference between a stub and a mock in JavaScript testing.”

Tips & gotchas

This skill assumes you have a basic understanding of JavaScript and unit testing concepts. It's most effective when used alongside a testing framework like Jest or Mocha.