rspec-rails + test-queue + simplecov

rails_helper.rb

if ENV['COVERAGE']
  require 'simplecov'
  require 'simplecov-rcov'
  SimpleCov.merge_timeout 3600
  SimpleCov.formatters = [
    SimpleCov::Formatter::HTMLFormatter,
    SimpleCov::Formatter::RcovFormatter
  ]
  SimpleCov.start 'rails'
end

RSpec.configure do |config|
  config.before(:each) do
    SimpleCov.command_name("rspec_#{Process.pid.to_s}#{ENV['TEST_ENV_NUMBER']}")
  end
end

rspec-queue

#!/usr/bin/env ruby

ENV['RAILS_ENV'] ||= 'test'
ENV['TEST_QUEUE_STATS'] ||= File.expand_path('../../tmp/.test_queue_stats', __FILE__)

require File.expand_path('../../config/environment', __FILE__)

require 'test_queue'
require 'test_queue/runner/rspec'

class MyAppRSpecRunner < TestQueue::Runner::RSpec
  def after_fork(num)
    ENV.update('TEST_ENV_NUMBER' => num.to_s)

    ActiveRecord::Base.configurations['test']['database'] << num.to_s
    ActiveRecord::Base.establish_connection(:test)

    ActiveRecord::Tasks::DatabaseTasks.drop_current
    ActiveRecord::Tasks::DatabaseTasks.create_current
    ActiveRecord::Tasks::DatabaseTasks.load_schema_current

    ::RSpec.configure do |config|
      config.add_formatter('RSpecJUnitFormatter', "spec/reports/test_queue_rspec_#{num}.xml")
    end

    SimpleCov.at_exit do
      SimpleCov.result
      exit! 0
    end
  end

  def summarize
    estatus = @completed.inject(0){ |s, worker| s + worker.status.exitstatus }
    estatus = 255 if estatus > 255
    exit(estatus)
  end

  def run_worker(iterator)
    @run_worker_ret = super
  end

  def cleanup_worker
    Kernel.exit @run_worker_ret if @run_worker_ret
  end
end

MyAppRSpecRunner.new.execute

shell

$ bundle exec ruby -v
ruby 2.2.1p85 (2015-02-26 revision 49769) [x86_64-darwin14]
$ bundle exec rails -v
Rails 4.2.1.rc3
$ bundle list | egrep ' rspec|test-queue|simplecov'                                                                                                                                                                                                                     
  * rspec (3.1.0)
  * rspec-activemodel-mocks (1.0.1)
  * rspec-core (3.1.7)
  * rspec-expectations (3.1.2)
  * rspec-mocks (3.1.3)
  * rspec-parameterized (0.1.3)
  * rspec-rails (3.1.0)
  * rspec-support (3.1.2)
  * rspec_junit_formatter (0.2.0)
  * simplecov (0.9.2)
  * simplecov-html (0.9.0)
  * simplecov-rcov (0.2.3)
  * test-queue (0.2.12)