Writing Ruby on Rails Specs with RSpec

When writing RSpec tests for Ruby on Rails applications, follow these guidelines to ensure comprehensive, maintainable, and well-structured test coverage.

Core Principles

1. Test Coverage Strategy

• No controller tests in most cases if we have spec/request and/or Capybara feature specs that already test the same thing
• Add a unit test for every new method added to models, services, and lib classes
• Test behavior, not implementation - focus on inputs and outputs
• Keep tests isolated - each test should be independent

2. File Structure

Organize specs to mirror application structure: