rspec-tracer by avmnu-sng

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

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.

Action Cable testing utils. Maintained by palkan on GitHub, where it has earned 212 stars from the community.