Testing login "remember me" feature with Capybara (rack::test or selenium) - deleting the session cookie (only)

cookie_steps.rb

Then /^show me the cookies!$/ do
  driver = Capybara.current_session.driver
  case driver
  when Capybara::Selenium::Driver
    announce_selenium_cookies(Capybara.current_session.driver.browser)
  when Capybara::RackTest::Driver
    announce_rack_test_cookies(get_rack_test_cookie_jar)
  else 
    raise "unsupported driver, use rack::test or selenium/webdriver"
  end
end

Given /^I close my browser \(clearing the Medify session\)$/ do
  delete_cookie session_cookie_name
end

module CookieStepHelper
  def session_cookie_name
    Rails.application.config.session_options[:key] #for rails 3, courtesy of https://github.com/ilpoldo
    #else just hard code it as follows
    #'_appname_session' #or check in browser for what your app is using
  end

  def delete_cookie(cookie_name)
    driver = Capybara.current_session.driver
    case driver
    when Capybara::Selenium::Driver
      browser = Capybara.current_session.driver.browser
      announce_selenium_cookies(browser) if @announce
      browser.manage.delete_cookie(cookie_name)
      announce "Deleted cookie: #{cookie_name}" if @announce
      announce_selenium_cookies(browser) if @announce
    when Capybara::RackTest::Driver
      announce_rack_test_cookies(get_rack_test_cookie_jar) if @announce
      delete_rack_test_cookie(get_rack_test_cookie_jar, cookie_name)
      announce "Deleted cookie: #{cookie_name}" if @announce
      announce_rack_test_cookies(get_rack_test_cookie_jar) if @announce
    else 
      raise "unsupported driver, use rack::test or selenium/webdriver"
    end
  end

  def announce_rack_test_cookies(cookie_jar)
    announce "Current cookies: #{cookie_jar.instance_variable_get(:@cookies).map(&:inspect).join("\n")}"
  end
  
  def announce_selenium_cookies(browser)
    announce "Current cookies: #{browser.manage.all_cookies.map(&:inspect).join("\n")}"
  end
  
  def get_rack_test_cookie_jar
    rack_test_driver = Capybara.current_session.driver
    cookie_jar = rack_test_driver.current_session.instance_variable_get(:@rack_mock_session).cookie_jar
  end
  
  def delete_rack_test_cookie(cookie_jar, cookie_name)
    cookie_jar.instance_variable_get(:@cookies).reject! do |existing_cookie|
      existing_cookie.name.downcase == cookie_name
    end
  end
end
World(CookieStepHelper)
Before('@announce') do
  @announce = true
end

remember_me.feature

  @javascript @announce
  Scenario: remembering users so they don't have to log in again for a while
    Given an activated member exists with forename: "Paul", surname: "Smith", email: "paul_smith_91@gmail.com", password: "bananabanana"
    When I go to the dashboard
    Then I should see "Existing Member Login"
    When I fill in "Email" with "paul_smith_91@gmail.com" within "#member_login"
    And I fill in "Password" with "bananabanana" within "#member_login"
    And I check "Remember me"
    And I press "Sign in"
    Then I should be on the dashboard
    And I should see "Logged in as Paul Smith"
    And I should see "Sign out"

    Given I close my browser (clearing the Medify session)
    When I come back next time
    And I go to the dashboard
    Then I should see "Logged in as Paul Smith"
    And I should see "Sign out"

  @rack_test @announce
  Scenario: don't remember users across browser restarts if they don't want it
    Given an activated member exists with forename: "Paul", surname: "Smith", email: "paul_smith_91@gmail.com", password: "bananabanana"
    When I go to the dashboard
    Then I should see "Existing Member Login"
    When I fill in "Email" with "paul_smith_91@gmail.com" within "#member_login"
    And I fill in "Password" with "bananabanana" within "#member_login"
    And I uncheck "Remember me"
    And I press "Sign in"
    Then I should be on the dashboard
    And I should see "Logged in as Paul Smith"
    And I should see "Sign out"

    Given I close my browser (clearing the Medify session)
    When I come back next time
    And I go to the dashboard
    Then I should see "Existing Member Login"
    And I should not see "Logged in as Paul Smith"
    And I should not see "Sign out"