rails-testing

name

rails-testing

description

Ruby on Rails testing best practices for writing effective, maintainable test suites with RSpec. This skill should be used when writing, reviewing, or refactoring Rails tests to ensure proper test design, data management, and coverage patterns. Triggers on tasks involving RSpec specs, model tests, request specs, system tests, factory definitions, Capybara interactions, Sidekiq job tests, or test suite optimization. Complementary to rails-dev, ruby-optimise, and ruby-refactor skills.

Community Ruby on Rails Testing Best Practices

Comprehensive testing guide for Ruby on Rails applications, maintained by Community. Contains 46 rules across 8 categories, prioritized by impact to guide automated test generation, review, and refactoring.

When to Apply

Reference these guidelines when:

• Writing new RSpec specs for models, requests, system tests, or jobs
• Setting up FactoryBot factories with traits and sequences
• Writing Capybara system tests for user journeys
• Testing background jobs with Sidekiq or Active Job
• Reviewing test code for anti-patterns (mystery guests, flaky tests, slow specs)
• Optimizing test suite performance and CI pipeline speed
• Organizing test files, shared examples, and custom matchers

Rule Categories by Priority

Priority	Category	Impact	Prefix
1	Test Design & Structure	CRITICAL	design-
2	Test Data Management	CRITICAL	data-
3	Model Testing	HIGH	model-
4	Request & Controller Testing