Vanilla Rails Testing

About

This skill equips Claude with the specific testing philosophy championed by 37signals, the creators of Ruby on Rails. It moves away from common community gems like RSpec and FactoryBot in favor of core Rails defaults. By prioritizing fixtures for data persistence, integration tests for controller logic, and the Minitest framework for its simplicity, it helps developers build highly performant and realistic test suites. The skill strictly enforces 'The Iron Law' of no data creation within tests and requires Current.session context setup, ensuring your testing environment mirrors production behavior as closely as possible.

Key Features

• Transition to integration-style controller tests via ActionDispatch::IntegrationTest
• Strict enforcement of Rails fixtures over FactoryBot or manual data creation
• Mandatory Current.session context setup for model-level testing
• 1 GitHub stars
• Streamlined test naming conventions and state change assertions using lambda syntax
• Standardization on Minitest syntax and native Rails assertions

Use Cases

• Ensuring new tests follow the 37signals OMR (Omakase) testing patterns
• Automating the setup of Current context and fixture references in complex model tests
• Migrating an existing Rails test suite from RSpec and FactoryBot to Vanilla Rails standards