delta_test

It's kinda "delta update" for RSpec.

It basically do two things:

1. Analyzes your tests and creates a dependencies table
2. Based on the dependencies table and git diff,
   only runs partial specs that are considered to be related to the file changes.

Add this line to your Gemfile:

gem 'delta_test'

Create configuration file at your project root directory.

$ vi delta_test.yml

patterns:
  - lib/**/*.rb
  - app/**/*.rb

Include delta_test in your spec/spec_helper.rb.

require 'delta_test'
require 'delta_test/spec_helpers'

RSpec.configure do |config|

  config.include DeltaTest::SpecHelpers

end

$ git clone git@example.com:sample/sample_stats.git tmp/delta_test_stats
$ delta_test stats:clean
$ delta_test exec rspec
$ delta_test stats:save

usage: delta_test <command> [--verbose] [<args>]

options:
    --verbose      Print more output.

commands:
    exec [--force] <script> -- <files...>
                   Execute test script using delta_test.
                   --force to force DeltaTest to run full test in profile mode.

    specs          List related spec files for changes.

    stats:clean    Clean up temporary files.

    stats:show     Show dependencies table.

    stats:save [--no-sync]
                   Save and sync a table file.

    version        Show version.

    help           Show this.

RSpec command is rewritten to:

$ bundle exec rspec
↓
$ bundle exec delta_test exec rspec

With file lists:

$ bundle exec rspec spec/{models,controllers}
↓
$ bundle exec delta_test exec rspec -- spec/{models,controllers}

And to colorize RSpec outputs, use --tty option of rspec command:

$ bundle exec delta_test exec rspec --tty

Also delta_test supports parallel_tests:

$ bundle exec parallel_test -t rspec -n 4 spec/features
↓
$ bundle exec delta_test exec parallel_test -t rspec -n 4 -- spec/features

stats_path: tmp/delta_test_stats
stats_life: 1000

full_test_patterns:
  - Gemfile.lock

full_test_braches:
  - master

patterns:
  - lib/**/*.rb
  - app/**/*.rb

exclude_patterns:
  - lib/batch/*.rb

custom_mappings:
  spec/features/i18n_spec.rb:
    - config/locales/**/*.yml

Run units tests:

$ rake test  # or you can use `rspec`

Run integration tests:

$ (cd spec/rails && bundle install)
$ rake rails:test

Contributions are always welcome!

1. Ensure the bug can be reproduced on the latest master
2. Check it's not a duplicate
3. Raise an issue

1. Fork the repository
2. Create a branch
3. Write test-driven code
4. Update the documentation if necessary
5. Create a new pull request

This project is released under the MIT license. See LICENSE.txt file for details.

@creasty