Created a cucumber example along with documentation about what it means.

sample-code/examples/ruby/cucumber/features/calculator.feature

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+# Features describe what something should allow a user to accomplish.  They're
+# high-level things, like you'd put in your manual or marketing copy.  For more
+# information about features, check out the documentation at:
+
+
+Feature: Addition
+  In order to revolutionize maths teaching
+  As an iOS developer
+  I want to be able to sum two numbers
+
+  Scenario: Add two numbers
+    Given I have entered 4 into field 1 of the calculator
+    And I have entered 7 into field 2 of the calculator
+    When I press button 1
+    Then the result should be displayed as 11

sample-code/examples/ruby/cucumber/features/step_definitions/steps.rb

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+# These are the 'step definitions' which Cucumber uses to 
+#
+Given /^I have entered (\d+) into field (\d+) of the calculator$/ do |value, field|
+  puts "Called: #{value}  #{field}"
+  elements = selenium.find_elements(:tag_name, "textField")
+  elements[field.to_i - 1].send_keys value
+end
+
+Then /^the result should be displayed as (\d+)$/ do |expected|
+  result = selenium.find_element(:tag_name, "staticText")
+  result.attribute("value").should eq expected
+end
+
+And /^I press button (\d+)$/ do |button_index|
+  button = selenium.find_elements(:tag_name, "button")[button_index.to_i - 1]
+  button.click
+end

sample-code/examples/ruby/cucumber/features/support/env.rb

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+require 'rspec/expectations'
+require 'selenium-webdriver'
+
+APP_PATH = '../../../../../apps/TestApp/build/release-iphonesimulator/TestApp.app'
+
+def capabilities
+  {
+    'browserName' => 'iOS',
+    'platform' => 'Mac',
+    'version' => '6.0',
+    'app' => absolute_app_path
+  }
+end
+ 
+def absolute_app_path
+  File.join(File.dirname(__FILE__), APP_PATH)
+end
+
+def server_url
+  "http://127.0.0.1:4723/wd/hub"
+end
+ 
+def selenium
+  @driver ||= Selenium::WebDriver.for(:remote, :desired_capabilities => capabilities, :url => server_url)
+end