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distributed rspec & cucumber via bonjour

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README.markdown

Specjour

FUCK SETI. Run specs with your spare CPU cycles.

Distribute your spec suite amongst your LAN via Bonjour.

  1. Spin up a manager on each machine that can run your specs.
  2. Start a dispatcher in your project directory.
  3. Say farewell to your long coffee breaks.

Requirements

  • Bonjour or DNSSD (the capability and the gem)
  • Rsync (system command used)
  • Rspec (officially v1.3.0)

Installation

gem install specjour

Give it a try

Running specjour starts a dispatcher, a manager, and multiple workers - all of the componenets necessary for distributing your test suite.

$ cd myproject
$ specjour

Start a manager

Running specjour listen will start a manager which advertises that it's ready to run specs. By default, the manager runs tests for the project in the current directory and uses your system cores to determine the number of workers to start. If your system has two cores, two workers will run tests.

$ specjour listen

Distribute the tests

Dispatch the tests among the managers you started. Specjour checks the 'spec' and 'features' directories for tests.

$ specjour

Distribute a subset of tests

The first parameter to the specjour command is a test directory. It defalts to the current directory and searches for 'spec' and 'features' paths therein.

$ specjour spec # all rspec tests
$ specjour spec/models # only model tests
$ specjour features # only features
$ specjour ~/my_other_project/features

Rails

Each worker should run their specs in an isolated database. Modify the test database name in your config/database.yml to include the following environment variable (Influenced by parallel_tests):

test:
  database: blog_test<%=ENV['TEST_ENV_NUMBER']%>

ActiveRecord Hooks

Specjour contains ActiveRecord hooks that clear database tables before running tests using DELETE FROM <table_name>;. Additionally, test databases will be created if they don't exist (i.e. CREATE DATABASE blog_test8 for the 8th worker) and your schema will be loaded when the database is out of date.

Custom Hooks

Specjour allows you to hook in to the test process on a per-machine and per-worker level through the before_fork and after_fork configuration blocks. If the default ActiveRecord hook doesn't set up the database properly for your test suite, override it with a custom after_fork hook.

# config/initializers/specjour.rb
Rails.configuration.after_initialize do

  # Modify the way you use bundler
  Specjour::Configuration.before_fork = lambda do
    # TODO: not working as advertised
    system('bundle install --without production')
  end

  # Modify your database setup
  Specjour::Configuration.after_fork = lambda do
    # custom database setup here
  end

end

A preparation hook is run when specjour prepare is invoked. This hook allows you to run arbitrary code on all of the listening workers. By default, it drops and recreates the database on all workers.

Rails.configuration.after_initialize do

  # Modify preparation
  Specjour::Configuration.prepare = lambda do
    # custom preparation code
  end

end

Only listen to supported projects

By default, a manager will listen to all projects trying to distribute specs over the network. Sometimes you'll only want a manager to respond to one specific spec suite. You can accomplish this with the --projects flag.

$ specjour listen --projects bizconf # only run specs for the bizconf project

You could also listen to multiple projects:

$ specjour listen --projects bizconf,workbeast # only run specs for the bizconf and workbeast projects

Customize what gets rsync'd

The standard rsync configuration file may be too broad for your project. If you find you're rsyncing gigs of extraneous data from your public directory, add an exclusion to your projects rsyncd.conf file.

$ vi workbeast/.specjour/rsyncd.conf

Thanks

  • shayarnett - Cucumber support, pairing and other various patches
  • voxdolo - Endless support, alpha testing, various patches
  • leshill - Made rsync daemon configurable
  • testjour - Ripped off your name
  • parallel_tests - Made my test suite twice as fast

Note on Patches/Pull Requests

  • Fork the project.
  • $ source .dev to ensure you're using the local specjour binary, not the rubygems version
  • Make your feature addition or bug fix.
  • Add tests for it. This is important so I don't break it in a future version unintentionally.
  • Commit, do not mess with rakefile, version, or history. (if you want to have your own version, that is fine but bump version in a commit by itself I can ignore when I pull)
  • Send me a pull request. Bonus points for topic branches.

Copyright

Copyright (c) 2010 Sandro Turriate. See MIT_LICENSE for details.

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