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RspecChunked

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.

Installation

  • 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

Usage

  • 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)

Coverage merge reports (when using simplecov)

This task will merge all coverage reports rake rspec_chunked:merge_reports

Github workflow result

  • Before:
    Before

  • After:
    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"

Contributing

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.

License

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