simplecov

Identify coverage gaps in Ruby and Rails projects using SimpleCov.

12|2|Updated Mar 11, 2025

Search Tags:#testing #coverage #ruby #rails #ci #simplecov

Ready to run

npx skills add https://github.com/el-feo/ai-context --skill simplecov

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Please help me install this Agent Skill.
Skill: simplecov
Source: https://github.com/el-feo/ai-context/tree/main/skills/simplecov
Command: npx skills add https://github.com/el-feo/ai-context --skill simplecov

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

SimpleCov tracks test coverage and, with reporters and integration options, helps enforce coverage standards across Ruby and Rails projects.

Core Features & Use Cases

Coverage tracking for line and branch coverage.
CI/CD integration and custom reporters (e.g., RubyCritic integration).
Multi-suite merging and advanced reporting capabilities.

Quick Start

Install SimpleCov, configure .simplecov, load it at test startup, and run tests to generate coverage reports.

Frequently Asked Questions about simplecov

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

FAQPage Schema

How do I track test coverage in Ruby and Rails projects?▼

Test coverage tracking identifies which lines and branches of code are executed during tests. SimpleCov integrates with Ruby and Rails test suites, generating line and branch coverage reports to reveal untested code paths and help enforce coverage standards across your project.

Can I enforce minimum coverage thresholds in CI/CD pipelines?▼

Yes. SimpleCov lets you configure coverage thresholds that fail builds when coverage falls below your target. Integration with CI/CD pipelines ensures coverage checks run automatically, preventing regressions and maintaining code quality standards across commits.

How do I merge coverage reports from multiple test suites?▼

SimpleCov supports multi-suite merging to consolidate coverage data from unit, integration, and system tests into a single report. This aggregated view shows complete coverage across all test types, eliminating blind spots from running suites separately.

What formats does SimpleCov use to report coverage results?▼

SimpleCov generates console output for quick feedback and HTML reports for detailed browsing. These formats let you view coverage metrics directly in your terminal or open detailed breakdowns in a browser to inspect uncovered lines.

Does SimpleCov work with RubyCritic for code quality feedback?▼

SimpleCov integrates with RubyCritic to coordinate coverage analysis with other code quality metrics. This integration provides holistic feedback combining coverage gaps with complexity and style issues in a unified quality assessment.

What's the simplest way to add coverage tracking to an existing Rails project?▼

Install SimpleCov, add configuration to your test setup, load it before tests run, then execute your test suite. SimpleCov automatically generates coverage reports without requiring changes to test code itself.