Minitest is a complete testing suite for Ruby that provides unit testing, mocking, and benchmarking capabilities. It ships as part of Ruby's standard library, though the gem version may include newer features. Minitest offers both a traditional unit test style (similar to Test::Unit) and a spec-style DSL. Compared to RSpec, Minitest emphasizes simplicity and speed, using plain Ruby without extensive DSLs or magic. It's a practical choice for projects that value straightforward testing without additional complexity.
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