[Ruby on Rails 3, Ruby on Rails 4] Cucumber を試す

group :test do
  gem 'cucumber-rails', '1.2.1', :require => false
  gem 'database_cleaner', '0.7.0'
end

% bundle
% rails generate cucumber:install
      create  config/cucumber.yml
      create  script/cucumber
       chmod  script/cucumber
      create  features/step_definitions
      create  features/support
      create  features/support/env.rb
       exist  lib/tasks
      create  lib/tasks/cucumber.rake
        gsub  config/database.yml
        gsub  config/database.yml
       force  config/database.yml

% subl features/signing_in.feature

Feature: Signing in
Scenario: Unsuccessful signin
    Given a user visits the signin page
    When he submits invalid signin information
    Then he should see an error message
Scenario: Successful signin
    Given a user visits the signin page
      And the user has an account
    When the user submits valid signin information
    Then he should see his profile page
      And he should see a signout link

% subl features/step_definitions/authentication_steps.rb

Given /^a user visits the signin page$/ do
  visit signin_path
end
When /^he submits invalid signin information$/ do
  click_button "Sign in"
end
Then /^he should see an error message$/ do
  page.should have_selector('div.alert.alert-error')
end
Given /^the user has an account$/ do
  @user = User.create(name: "Example User", email: "user@example.com",
                      password: "foobar", password_confirmation: "foobar")
end
When /^the user submits valid signin information$/ do
  fill_in "Email",    with: @user.email
  fill_in "Password", with: @user.password
  click_button "Sign in"
end
Then /^he should see his profile page$/ do
  page.should have_selector('title', text: @user.name)
end
Then /^he should see a signout link$/ do
  page.should have_link('Sign out', href: signout_path)
end

% bundle exec cucumber features/
Using the default profile...
Feature: Signing in
  Scenario: Unsuccessful signin                # features/signing_in.feature:3
    Given a user visits the signin page        # features/step_definitions/authentication_steps.rb:1
    When he submits invalid signin information # features/step_definitions/authentication_steps.rb:5
    Then he should see an error message        # features/step_definitions/authentication_steps.rb:9
  Scenario: Successful signin                      # features/signing_in.feature:8
    Given a user visits the signin page            # features/step_definitions/authentication_steps.rb:1
    And the user has an account                    # features/step_definitions/authentication_steps.rb:13
    When the user submits valid signin information # features/step_definitions/authentication_steps.rb:18
    Then he should see his profile page            # features/step_definitions/authentication_steps.rb:24
    And he should see a signout link               # features/step_definitions/authentication_steps.rb:28
2 scenarios (2 passed)
8 steps (8 passed)
0m0.882s