Tests tasks in Capfile

[crizCraig]

Thought this could help someone:

require 'rubygems'
gem 'minitest'

require 'minitest/autorun'
require 'capistrano'

require 'minitest-capistrano'
require 'capistrano/cli'

describe 'my_project' do

  before do
    ENV['TEST'] = 'true'
    @config = Capistrano::Configuration.new
    @config.extend(MiniTest::Capistrano::ConfigurationExtension)
    @config.load file: File.expand_path(File.join(File.dirname(__FILE__), 'Capfile'))
  end

  subject { MiniTest::Unit::TestCase.new 'the test case' }

  it 'does something in production when the task role is production' do
    test_environment 'do_something_on_production', 'production'
  end

  it 'does something in staging when the task role is staging' do
    test_environment 'do_something_on_staging', 'staging'
  end

  it 'does something in staging when the task role is not defined' do
    test_environment 'do_something', 'staging'
  end
end

def test_environment(task, environment)
  subject.assert_have_task task.to_sym, @config
  @config.find_and_execute_task task
  subject.assert_have_run "echo #{environment}", @config
end

Some gems may not load in the test environment, hence the ENV['test'] and

def this_is_a_test
  ENV['TEST'] == 'true'
end

unless this_is_a_test
  require 'hipchat/capistrano'
end