Jest testing

Skill a5c-ai/babysitter/library/specializations/qa-testing-automation/skills/jest-testing

Babysitter enforces obedience on agentic workforces and enables them to manage extremely complex tasks and workflows through deterministic, hallucination-free self-orchestration

Install

npx -y skills add a5c-ai/babysitter --skill jest-testing

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What its author says it does

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Expert Jest testing framework for JavaScript/TypeScript unit and integration testing

SKILL.md

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Jest Testing Skill

Overview

This skill provides expert-level capabilities for Jest-based testing, enabling comprehensive unit testing, snapshot testing, and integration with React Testing Library.

Capabilities

Test Execution

Configure Jest for various project types (Node, React, TypeScript)
Execute tests with coverage collection
Parallel test execution configuration
Watch mode and selective test running

Unit Testing

Write unit tests with proper mocking
Configure custom matchers and test utilities
Mock module resolution and timer handling
Handle async testing patterns

Snapshot Testing

Configure and manage snapshot tests
Handle snapshot updates and reviews
Implement inline snapshots

Coverage Analysis

Coverage report generation and analysis
Configure coverage thresholds
Identify uncovered code paths

React Integration

Integration with React Testing Library
Component testing patterns
Hook testing utilities

Target Processes

automation-framework.js - Test framework setup
mutation-testing.js - Test quality assessment
continuous-testing.js - CI/CD integration
shift-left-testing.js - Early testing integration

Dependencies

jest - Test runner
@testing-library/react - React testing utilities
ts-jest - TypeScript support (optional)

Usage Example

{
  kind: 'skill',
  skill: {
    name: 'jest-testing',
    context: {
      action: 'execute-tests',
      testPath: 'src/**/*.test.ts',
      coverage: true,
      coverageThreshold: {
        global: { branches: 80, functions: 80, lines: 80 }
      }
    }
  }
}

Configuration

The skill respects jest.config.js or jest.config.ts in the project root and can override settings as needed.