rspec-multicore-rails

rspec-multicore-rails loads rspec-multicore and automatically isolates ActiveRecord connections for Rails test workers.

Worker 1 uses the base test database. Later workers use _2, _3, and so on; SQLite suffixes are placed before the extension. The adapter refuses non-test environments and clears inherited connections before connecting.

bundle exec rake db:test:multicore:prepare
bundle exec rake db:test:multicore:drop
bundle exec rake db:test:multicore:recreate

The adapter does not manage Redis, Sidekiq, caches, loggers, SimpleCov, or profilers. Configure those with RSpec::Multicore.on_worker_fork and on_worker_shutdown.

Requires Ruby 3.2+, Rails/ActiveRecord 7.1–8.x, and exactly the matching rspec-multicore version.