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jest-coverage

Configure, execute, and analyze Jest code coverage reports.

8|2|Updated Jan 15, 2026
Search Tags:#typescript#testing#unit testing#code coverage#javascript#jest
One-click install
npx skills add https://github.com/bradtaylorsf/alphaagent-team --skill jest-coverage
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: jest-coverage
Source: https://github.com/bradtaylorsf/alphaagent-team/tree/main/plugins/aai-stack-jest/skills/jest-coverage
Command: npx skills add https://github.com/bradtaylorsf/alphaagent-team --skill jest-coverage

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps developers configure, run, and analyze code coverage reports generated by Jest, ensuring comprehensive testing and identifying areas needing more test coverage.

Core Features & Use Cases

  • Jest Configuration: Provides examples for jest.config.js to enable coverage collection, define reporters, and set thresholds.
  • Running Coverage: Demonstrates CLI commands and package.json scripts for executing Jest with coverage.
  • Improving Coverage: Offers strategies for identifying and fixing coverage gaps, focusing on branch coverage and edge cases.
  • Use Case: A developer wants to ensure their new feature branch meets the team's 80% line coverage requirement before merging. They use this Skill to configure Jest, run coverage, and identify which lines are not being tested.

Quick Start

Configure your Jest project to collect code coverage by adding collectCoverage: true to your jest.config.js file.

Frequently Asked Questions about jest-coverage

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I configure Jest code coverage thresholds in my project?▼

Jest code coverage is configured by adding `collectCoverage: true` to your `jest.config.js` file, enabling the test runner to collect metrics on untested lines, branches, and functions during execution.

What is the best way to identify untested code segments using Jest?▼

Identifying untested code segments involves running Jest with coverage enabled and analyzing the generated reports, which highlight specific branches and edge cases lacking test execution.

Can I integrate Jest coverage reports into CI/CD pipelines for automated checks?▼

Yes, Jest coverage integrates with CI/CD pipelines for automated quality checks by executing CLI commands with threshold configurations, failing the build if coverage drops below required limits.

Does TypeScript work with Jest code coverage configuration?▼

TypeScript works with Jest code coverage configuration by utilizing the appropriate test runner setup, allowing you to collect metrics and enforce threshold requirements across TypeScript and JavaScript files.

How do I define various output reporters for Jest coverage analysis?▼

Defining various output reporters is done within the `jest.config.js` file, specifying the desired formats to visualize coverage data and pinpoint untested code segments effectively.

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