Sample sources for post: http://wp.me/piFiH-an

cucumber.rake

begin
  require 'cucumber/rake/task'

  Cucumber::Rake::Task.new(:cucumber) do |t|
    t.cucumber_opts = "features --format pretty"
  end

  namespace :cucumber do
    Cucumber::Rake::Task.new(:wip) do |t|
      t.cucumber_opts = "features --format pretty -t @wip --wip"
    end
  end

rescue LoadError
  desc 'cucumber rake task not available (cucumber not installed)'
  task :cucumber do
    abort 'Cucumber rake task is not available. Be sure to install cucumber as a gem.'
  end
end

env_terminal.rb

require "fileutils"

OUTPUT = 'tmp/output.log'
SHOW_OUTPUT = !!ENV["show_output"]
#rake cucumber show_output=true  #to show output

Before do
  FileUtils.rm_f OUTPUT
  FileUtils.mkdir_p File.dirname(OUTPUT)
end

#execute system command, redirecting output
def execute(command)
  #2>&1 Redirect standard error to standard output
  system("#{command} > #{OUTPUT} 2>&1")
  puts File.read(OUTPUT) if SHOW_OUTPUT
end

#read output
def output
  File.read(OUTPUT)
end

#Change some commands if necessary
def gsub_command(system_command)
  command = system_command
  if system_command =~ /^gem/
    command << " --config-file=features/resources/gem-cucumber.yml"
  end
  command
end

terminal_steps.rb

When /^I run "([^\"]*)"$/ do |syscommand|
  command = gsub_command(syscommand)
  execute(command)
end

Then /^I should see "([^\"]*)"$/ do |data|
  output.should match(Regexp.new(Regexp.escape(data)))
end

Then /^I should not see "([^\"]*)"$/ do |data|
  output.should_not match(Regexp.new(Regexp.escape(data)))
end

Then /^I should see file "([^\"]*)" content like$/ do |filename, content|
  File.read(filename).should == content
end

Given /^I have a file "([^\"]*)" with content$/ do |filename, content|
  File.open(filename, "w+") { |file| file.puts content }
end