coverage-analysis

Analyze Jest and NYC coverage reports to identify untested code paths.

8|2|Updated Jan 15, 2026

Search Tags:#testing #quality assurance #refactoring #code coverage #jest #nyc

Ready to run

npx skills add https://github.com/bradtaylorsf/alphaagent-team --skill coverage-analysis-bradtaylorsf

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: coverage-analysis
Source: https://github.com/bradtaylorsf/alphaagent-team/tree/main/plugins/aai-testing/skills/coverage-analysis
Command: npx skills add https://github.com/bradtaylorsf/alphaagent-team --skill coverage-analysis-bradtaylorsf

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps developers understand and improve their code's test coverage, ensuring critical logic is well-tested and reducing the risk of bugs.

Core Features & Use Cases

Configuration Guidance: Provides examples for configuring popular testing frameworks like Jest and NYC for coverage reporting.
Coverage Type Explanation: Details statement, branch, and function coverage with clear code examples.
Gap Identification: Offers patterns for finding and fixing uncovered code paths and error conditions.
Use Case: A developer can use this Skill to set up Jest to collect coverage reports, identify which lines of code are not being tested, and then write new tests to cover those gaps, ultimately increasing their project's reliability.

Quick Start

Configure Jest for code coverage analysis by adding the provided configuration to your jest.config.ts file.

Frequently Asked Questions about coverage-analysis

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

FAQPage Schema

How do I configure Jest and NYC for code coverage reporting?▼

Configuring Jest and NYC for code coverage reporting involves adding specific snippets to your jest.config.ts file to enable automated metric collection and threshold checks.

What is the difference between statement, branch, and function coverage?▼

Statement, branch, and function coverage measure different execution paths: statement coverage checks executed lines, branch coverage verifies conditional logic paths, and function coverage ensures all functions are invoked.

How do I identify and fix untested code paths in my business logic?▼

Identify and fix untested code paths in business logic by analyzing coverage reports to find gaps, then writing new tests targeting those specific uncovered error conditions and execution branches.

Can I integrate code coverage threshold checks into a CI/CD pipeline?▼

Yes, you can integrate code coverage analysis into CI/CD pipelines to automate reporting and enforce threshold checks, ensuring that critical API endpoints and authentication modules maintain sufficient test coverage.

What are the limitations of using code coverage metrics for quality assurance?▼

Code coverage metrics do not guarantee bug-free code; while they highlight untested statements and branches, they cannot verify if the tests correctly assert business logic or validate complex authentication flows.