How to use Capybara in pure Ruby (without Rails)?

问题:

I'm trying to get Capybara running in a simple Ruby script -- i.e. without/outside of Rails. Here's the script:

require 'rubygems'
require 'capybara'
require 'capybara/dsl'

include Capybara

Capybara.current_driver = :selenium
Capybara.app_host = 'http://www.google.com'

visit('/')

The problem is that when I run this I get this error:

NameError: uninitialized constant Capybara::Session

at top level    in dsl.rb at line 52
method gem_original_require in custom_require.rb at line 36
method require  in custom_require.rb at line 36
at top level    in capybara_test.rb at line 3
method gem_original_require in custom_require.rb at line 31
method require  in custom_require.rb at line 31
at top level    in capybara_test.rb at line 

What am I doing wrong?

Some more info:

• Mac OS X 10.5
• ruby 1.8.6 (2009-06-08 patchlevel 369) [universal-darwin9.0]
• capybara (0.3.9)

Thanks!

Neal

Note: Per the comment from jnicklas I tried this, which matches the new README more closely:

require 'rubygems'
require 'capybara'
require 'capybara/dsl'

Capybara.default_driver = :selenium
Capybara.app_host = 'http://www.google.com'

module MyCapybaraTest
  include Capybara

  def test_google
    visit('/')
  end
end

Unfortunately, I'm still seeing the same error:

NameError: uninitialized constant Capybara::Session

Thoughts?

Thanks!

回答1:

Here's something that seems to work for me:

require 'rubygems'
require 'capybara'
require 'capybara/dsl'

Capybara.run_server = false
Capybara.current_driver = :selenium
Capybara.app_host = 'http://www.google.com'

module MyCapybaraTest
  class Test
    include Capybara::DSL
    def test_google
      visit('/')
    end
  end
end

t = MyCapybaraTest::Test.new
t.test_google

回答2:

It goes to show that even incorrect documentation lives forever. The Capybara README used to recommend to include Capybara in the global namespace, this is a really bad idea, and messes up any number of random things. You should include Capybara in your own module or class and use that instead.

Check out the README for current best practices.

回答3:

Please check this CapybaraRspec101 example and fork it.

It's a small example for acceptance tests on http://www.hi5.com using from scratch:

• Capybara
• Rspec
• Selenium-webdriver

All instructions are in the repo