Unit test is a code which ensures that the program logic works as expected by verifying each component of it. The main goal is to isolate each part of the program and show that the individual parts are correct. The most powerful feature of this unit testing framework is that it can be used to test any kind of software, ranging from libraries to web applications.
When it comes to Unit Testing in Ruby, there are many open source libraries that you can use. Here we'll focus on the 7 best Unit Testing libraries for Ruby including Riot - a fast, expressive, and contextual ruby unit testing framework; single_test - Rake tasks to invoke single tests/specs with rakish syntax; riot-rails - Riot macros and helpers for Rails application testing