Guide Rails testing infrastructure, test types, and best practices.
npx skills add https://github.com/ThinkOodle/rails-skills --skill testing-thinkoodle
Please help me install this Agent Skill. Skill: testing Source: https://github.com/ThinkOodle/rails-skills/tree/main/skills/testing Command: npx skills add https://github.com/ThinkOodle/rails-skills --skill testing-thinkoodle
This Skill provides expert guidance on building robust and efficient test suites for Ruby on Rails applications, ensuring code quality and maintainability.
Use the testing skill to understand how to write a system test for a user login flow.
High-intent search queries and answers about installing and using this skill.
Choose Rails request tests for fast endpoint validation, but use system tests when your feature requires JavaScript interaction and Capybara browser simulation. Request tests validate routing and responses, while system tests execute full browser interactions to verify complex UI behavior.
The Rails testing pyramid prioritizes fast model tests at the base, fewer request tests in the middle, and minimal slow system tests at the top. This structure ensures fast, reliable test suites by maximizing rapid isolated unit tests and minimizing expensive browser-driven system tests.
Configure Capybara for Rails system tests by setting up the driven_by method in your application system test case, specifying a browser driver like headless Chrome. This allows your test suite to execute JavaScript-driven interactions and simulate real user behavior across DOM elements.
Minitest is Rails' default testing framework, offering fast execution and tight integration, while rspec provides an expressive syntax for readable specifications. Both integrate with Capybara for system tests, so the choice depends on your team's preferred syntax and existing test suite conventions.
Set up Rails parallel testing by enabling parallelize(workers: :number_of_processors) in your test helper, then configure your CI pipeline to distribute test files across multiple runners. This reduces overall test suite execution time and provides faster CI feedback loops.
Common Rails testing anti-patterns include overusing slow system tests for logic that belongs in fast model tests, poorly managing test database state, and avoiding fixtures. Eliminating these issues ensures fast, reliable test suites by maintaining proper test type selection and database isolation.
erwaenGenerate Rails model scaffolds with migration, validations, associations, scopes, and RSpec specs.
bismuthdigitalRun Python test suites with pytest and generate coverage reports.
mattszeinWrite RSpec tests for Rails models, controllers, and system flows.
vitaliytvAutomate surviving mutant identification and iterative test generation in git worktrees.
