testing
Rails Testing Expert
Build fast, reliable, maintainable test suites for Rails applications. This skill covers the Rails testing ecosystem — test types, infrastructure, and what to test where.
Companion skill: For Minitest-specific assertions, fixtures deep-dive, TDD workflow, and RSpec-to-Minitest conversion, see the minitest skill.
When To Use This Skill
- Setting up or configuring a Rails test suite
- Choosing between test types (system, request, model, job, mailer, etc.)
- Writing system tests with Capybara
- Configuring parallel testing or CI pipelines
- Debugging flaky tests or test database issues
- Adding test coverage for new features
Philosophy
The Testing Pyramid — Enforce It
More from thinkoodle/rails-skills
minitest
Expert guidance for writing fast, maintainable Minitest tests in Rails applications. Use when writing tests, converting from RSpec, debugging test failures, improving test performance, or following testing best practices. Covers model tests, policy tests, request tests, system tests, fixtures, and TDD workflows.
33caching
Expert guidance for Rails caching — fragment caching, Russian doll caching, cache keys/versioning, low-level caching (Rails.cache), conditional GET (stale?/fresh_when), and cache stores (Solid Cache, Redis, Memcached). Use when implementing cache, caching, fragment cache, Russian doll, Rails.cache, Solid Cache, cache key, HTTP caching, stale?, fresh_when, cache store, or optimizing performance.
4uuid-primary-keys
Expert guidance for implementing UUID primary keys in Rails applications. Use when setting up UUIDs as primary keys, choosing between UUIDv4 and UUIDv7, configuring generators for UUID defaults, writing migrations with id colon uuid, adding UUID foreign keys, implementing base36 encoding for URL-friendly IDs, configuring PostgreSQL pgcrypto or gen_random_uuid, implementing SQLite binary UUID storage, choosing a primary key type, using non-sequential IDs, secure IDs, random IDs, or any ID generation strategy beyond auto-increment integers.
4security
Expert guidance for writing secure Rails applications. Use when dealing with security, CSRF protection, XSS prevention, SQL injection, authentication, authorization, sanitize, html_safe, credentials, secrets, content security policy, session security, mass assignment, strong parameters, secure headers, file uploads, open redirects, or vulnerability remediation. Covers every major attack vector and the Rails-idiomatic defenses.
4stimulus
Expert guidance for building Stimulus controllers in Rails applications. Use when creating JavaScript behaviors, writing data-controller/data-action/data-target attributes, building interactive UI components, or working with Hotwire Stimulus. Covers controller creation, targets, values, actions, classes, outlets, lifecycle callbacks, progressive enhancement, and common patterns like clipboard, flash, modal, toggle, and form validation.
4i18n
Expert guidance for Rails I18n (internationalization and localization). Use when working with translations, locale files, t() / l() helpers, lazy lookups, pluralization, interpolation, date/time/number formatting, model translations, error message translations, setting locale from URL/header/session, or organizing YAML translation files. Triggers on "i18n", "internationalization", "translation", "locale", "localize", "t()", "translate", "multilingual", "pluralization", "locale file", "YAML translation".
4