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Javascript Testing Patterns

Checked
microck·vlatest·backend

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 microck/ordinary-claude-skills --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

microck

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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.

  • 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

    Only contacts known or declared hosts: github.com.

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    Hosts contacted

    github.comsource host

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  • No credential access: passed

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  • Pinned to a commit: passed

    Scanned microck/ordinary-claude-skills at 1056d293d4.

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Commit
1056d293d4
Manifest
skills_all/javascript-testing-patterns/SKILL.md
Scanned
2 files, 1,004 lines
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About this skill

What it does

This skill provides guidance and code examples for implementing common JavaScript testing patterns. It helps developers write more robust, maintainable tests using techniques like mocking, stubbing, spies, and test doubles. The goal is to improve the quality of JavaScript applications through effective unit testing practices.

When to use it

  • When you need help writing unit tests for a complex JavaScript function or module.
  • To refactor existing tests that are brittle or difficult to maintain.
  • When introducing new developers to best practices in JavaScript testing.
  • For debugging failing tests and understanding the root cause of issues.

Key capabilities

  • Mocking dependencies
  • Stubbing return values
  • Using spies to track function calls
  • Implementing test doubles (mocks, stubs, spies)

Example prompts

  • "Show me how to mock a third-party API call in my Jest tests."
  • "Give me an example of using a spy to verify that a function was called with specific arguments."
  • “How can I stub the response from fetch for testing purposes?”

Tips & gotchas

This skill assumes you have a basic understanding of JavaScript and unit testing frameworks like Jest or Mocha. It's most effective when used in conjunction with existing test suites, rather than as a standalone solution to create tests from scratch.