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MiniTest, as the name suggests, is a small and fast unit testing framework. Shipped with Ruby 1.9, MiniTest supports a complete suite of testing capabilities such as TDD, BDD, mocking, and benchmarking. Since ruby 1.9 the ruby standard library has included a testing framework called MiniTest, it is a modern and lightweight replacement for ruby 1.8's Test::Unit framework. MiniTest provides:

•     Unit tests with MiniTest::Unit
•     Specs with MiniTest::Spec
•     mock objects with MiniTest::Mock
•     algorithm performance tests