Given, When, Then pattern applied to Capybara Request DSL

given_when_then-example_spec.rb

require 'spec_helper'

feature 'Report is Now'
  scenario 'with valid attributes' do
    Given 'I am authenticated' do
      @user = authenticate(create(:user))
    end
    And 'I have no reports' do
      @user.reports.should be_empty
    end
    When 'I post valid report data' do
      post url_for([:api, :v1, :reports]), :report => { :title => 'My Report' }, :format => :json
    end
    Then 'I should now have a report' do
      @user.reports.reload
      @user.reports.should_not be_empty
    end
    And 'the API responds with OK' do
      response.status.should be(200)
    end
  end
end

given_when_then.rb

def AcceptanceCondition(description = '', &block)
  example.metadata[:description] << "\n\s\s\s\s#{description}" if description.to_s.strip.size > 0
  if block_given?
    yield
  else
    pending 'This step has not be written yet'
  end
end

def Given(description = '', &block)
  AcceptanceCondition("Given #{description}", &block)
end

def When(description = '', &block)
  AcceptanceCondition("When #{description}", &block)
end

def Then(description = '', &block)
  AcceptanceCondition("Then #{description}", &block)
end

def And(description = '', &block)
  AcceptanceCondition("And #{description}", &block)
end

def But(description = '', &block)
  AcceptanceCondition("But #{description}", &block)
end

output

> rspec spec --format documentation

New Report It Now
  with valid attributes
    Given I am authenticated
    And I have no reports
    When I post valid report data
    Then I should now have a report
    And the API responds with OK