coverband by danmayer

Code coverage for Ruby with a powerful configuration library and automatic merging of coverage across test suites. Maintained by simplecov-ruby on GitHub, where it has earned 4,910 stars from the community.

Simple one-liner tests for common Rails functionality. Maintained by thoughtbot on GitHub, where it has earned 3,585 stars from the community.

A gem providing "time travel", "time freezing", and "time acceleration" capabilities, making it simple to test time-dependent code. It provides a unified method to mock Time.now, Date.today, and DateTime.now in a single call. Maintained by travisjeffery on GitHub, where it has earned 3,425 stars from the community.