wrong argument type Class (expected Module) (TypeError)

Question

I'm writing some tests in webrat with sinatra, and as part of that I need sessions.

The webrat wiki mentions that I need to call use Rack::Session::Cookie instead of enable :sessions - I have done this.

This particular test looks like this:

class RegisterNewUserTest < Test::Unit::TestCase
  include Webrat::Methods
  include Webrat::Matchers
  include Webrat::Session


  def app
    Rack::Builder.parse_file('config.ru').first
  end

  def register_new_user
    visit '/signup' 
    fill_in "user[email]", :with => "testing@jamesrgifford.com"
    set_hidden_field "user[password]", :to => "password"
    set_hidden_field "user[password_confirmation]", :to => "password"
    click_button "Register"
  end
end

When I run it, I get the following error:

in `include': wrong argument type Class (expected Module) (TypeError)
        from test.rb:77:in `<class:RegisterNewUserTest>'
        from test.rb:74:in `<main>'

When I remove Webrat::Session it goes away, but then my test is useless.

Answer 1

You're trying to include a class, which is not possible in ruby. Try using an instance of it :). Looking at webrat spec:

rack_test_session = Rack::Test::Session.new(Rack::MockSession.new(app))