rspec-rails

Automatically generates spec files via Rails generators, as shown in the 'Creating boilerplate specs' section where running 'rails generate model' creates corresponding model specs without manual setup.

Provides Rails-specific matchers like 'render_template', 'redirect_to', and 'have_enqueued_job', detailed in the 'Helpful Rails Matchers' table for testing controllers, views, and background jobs efficiently.

Supports ten spec types including model, controller, request, and system specs, enabling thorough testing across all Rails components as listed in the 'What tests should I write?' section.

Uses RSpec's DSL to combine plain English with test code, making specs serve as both verification and human-readable documentation, exemplified in the 'RSpec DSL Basics' example with descriptive contexts and expectations.