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