Rails by Example Tutorial Request Examples and Capybara - ruby-on-rails

Question

In the Rails on Rails Tutorial by Michael Hartl, the Request Examples make assertions on the response. I installed the cabybara and steak gem to create acceptance tests. After installing capybara, the requests examples are configured to use capybara. capybara examples have a different syntax and don't recognize the response.
How do I reset the Request Examples to run as RSpec example?
Test Error:
4) Users signup failure should not make a new user
Failure/Error: click_button
wrong number of arguments (0 for 1)
# ./spec/requests/users_spec.rb:13
# ./spec/requests/users_spec.rb:7
Request Example
describe "failure" do
it "should not make a new user" do
lambda do
visit signup_path
fill_in "Name", :with => ""
fill_in "Email", :with => ""
fill_in "Password", :with => ""
fill_in "Confirmation", :with => ""
click_button
response.should render_template('users/new')
end.should_not change(User, :count)
end
end

Answer 1

This might have something to do with rspec-rails request_example_group.rb.
request_example_group.rb
If the capybara lines are commented out, then the Request Examples are not defaulted to capybara.
capybara do
include Capybara
end
In the Acceptance examples, include capybara.
require File.expand_path(File.dirname(__FILE__) + '/acceptance_helper')
feature "This Is My First Feature", %q{
In order to ...
As a ...
I want to ...
} do
include Capybara
scenario "Scenario name" do
visit signup_path
fill_in "Name", :with => ""
fill_in "Email", :with => ""
fill_in "Password", :with => ""
fill_in "Confirmation", :with => ""
click_button "Sign up"
page.has_content?('welcome to the sample app')
end
end
I ended up forking rspec-rails and commenting out the capybara lines.
In the Gemfile, the gem installed from the fork.
Why bother? We want both white box and black box testing.

Answer 2

As you correctly point out in your answer, rspec-rails will include Capybara if it is installed. I think they're assuming that it never hurts to include Capybara, just in case you need it. Is that a problem for you? In other words, what specifically is the Capybara DSL conflicting with?
(This might be also be worth bringing up on the RSpec mailing list.)
As for the error you posted, it seems that you are simply missing an argument to the click_button method.