Which testing frameworks do you use?

RSpec and Minitest.

• RSpec: Popular, a DSL for writing tests, focused on behavior-driven development (BDD). Convenient for describing the expected behavior of the system.
• Minitest: The standard testing library in Ruby. Lightweight, fast, includes TDD, BDD, and mock/stub frameworks.

Both frameworks are flexible and support various testing approaches: unit, integration, acceptance.

Minitest is often chosen for new projects because it is included in the standard library, while RSpec is preferred for projects where BDD and test readability are important.