This gem permits running rspec tests in parallel by chunking tests into defined groups and balancing by file size. If the default order is not enough, it permits to balance manually by moving x percentage of test files from group A into group B.

• Add this line to your application's Gemfile:

  group :test do
    gem 'rspec_chunked'
  end

• And then execute: bundle install

• Add manual balance (optional)

    # config/rspec_chunked.rb
    if defined?(RspecChunked::ChunkedTests)
      data = { 1 => { to: 2, percentage: 15 },
               4 => { to: 3, percentage: 10 } }
      RspecChunked::ChunkedTests.balance_settings = data
    end

  Balance tests by moving 15% tests files from group 1 into group 2 and moving 10% tests files from group 4 into group 3

• Basic initialization CI_JOBS=1/3 rake rspec_chunked
• Custom initialization CI_LOGIC=qty_specs CI_JOBS=1/3 CI_CMD="bundle exec rspec ..." rake rspec_chunked
• CI_JOBS: Current job number / quantity of groups/jobs to be split
• CI_CMD: Custom rspec command
• CI_LOGIC: Kind of logic to be used when ordering tests: qty_specs or file_size (by default file_size)

This task will merge all coverage reports rake rspec_chunked:merge_reports

• Before:
  

• After:
  

• Github workflow sample:

  rspec_tests:
    name: Rspec tests
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        ci_job: [ 1, 2, 3, 4 ] # enumerize jobs
    env:
      CI_JOBS: ${{ matrix.ci_job }}/4 # <current_job>/<total_jobs>
  
    steps:
      - uses: actions/checkout@v2
      - name: Backend tests
        run: docker-compose run test /bin/sh -c "CI_JOBS=$CI_JOBS rake rspec_chunked"
  

Bug reports and pull requests are welcome on GitHub at https://github.com/owen2345/rspec_chunked. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

The gem is available as open source under the terms of the MIT License.